Merge branch 'master' into feature/client-feedback-component

2021-01-22 12:34:16 +01:00 · 2021-01-22 12:34:16 +01:00 · e411ac5b3d
parent 0e1142b3cc 54c7761e72
commit e411ac5b3d
49 changed files with 6039 additions and 231 deletions
--- a/packages/builder/package.json
+++ b/packages/builder/package.json
@ -66,6 +66,7 @@
    "@budibase/bbui": "^1.54.0",
    "@budibase/client": "^0.5.3",
    "@budibase/colorpicker": "^1.0.1",
+    "@budibase/string-templates": "^0.5.3",
    "@budibase/svelte-ag-grid": "^0.0.16",
    "@sentry/browser": "5.19.1",
    "@svelteschool/svelte-forms": "^0.7.0",
@ -75,7 +76,6 @@
    "deepmerge": "^4.2.2",
    "fast-sort": "^2.2.0",
    "lodash": "^4.17.13",
-    "mustache": "^4.0.1",
    "posthog-js": "1.4.5",
    "remixicon": "^2.5.0",
    "shortid": "^2.2.15",
--- a/packages/builder/src/builderStore/replaceBindings.js
+++ b/packages/builder/src/builderStore/replaceBindings.js
@ -1,8 +1,8 @@
-export const CAPTURE_VAR_INSIDE_MUSTACHE = /{{([^}]+)}}/g
+export const CAPTURE_VAR_INSIDE_TEMPLATE = /{{([^}]+)}}/g

 export function readableToRuntimeBinding(bindableProperties, textWithBindings) {
-  // Find all instances of mustasche
-  const boundValues = textWithBindings.match(CAPTURE_VAR_INSIDE_MUSTACHE)
+  // Find all instances of template strings
+  const boundValues = textWithBindings.match(CAPTURE_VAR_INSIDE_TEMPLATE)

  let result = textWithBindings
  // Replace readableBindings with runtimeBindings
@ -22,7 +22,7 @@ export function runtimeToReadableBinding(bindableProperties, textWithBindings) {
  let temp = textWithBindings
  const boundValues =
    (typeof textWithBindings === "string" &&
-      textWithBindings.match(CAPTURE_VAR_INSIDE_MUSTACHE)) ||
+      textWithBindings.match(CAPTURE_VAR_INSIDE_TEMPLATE)) ||
    []

  // Replace runtimeBindings with readableBindings:
--- a/packages/builder/src/builderStore/uuid.js
+++ b/packages/builder/src/builderStore/uuid.js
@ -1,6 +1,6 @@
 export function uuid() {
  // always want to make this start with a letter, as this makes it
-  // easier to use with mustache bindings in the client
+  // easier to use with template string bindings in the client
  return "cxxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx".replace(/[xy]/g, c => {
    const r = (Math.random() * 16) | 0,
      v = c == "x" ? r : (r & 0x3) | 0x8
--- a/packages/builder/src/components/automation/AutomationBuilder/FlowChart/AutomationBlockTagline.svelte
+++ b/packages/builder/src/components/automation/AutomationBuilder/FlowChart/AutomationBlockTagline.svelte
@ -1,5 +1,5 @@
 <script>
-  import mustache from "mustache"
+  import { processStringSync } from "@budibase/string-templates"
  import { get } from "lodash/fp"
  import { backendUiStore } from "builderStore"

@ -54,8 +54,8 @@
      }
    })

-    // Fill in bindings with mustache
-    return mustache.render(formattedTagline, { inputs })
+    // Fill in bindings with templating library
+    return processStringSync(formattedTagline, { inputs })
  }
 </script>

--- a/packages/builder/src/components/common/Dropdowns/DropdownItem.svelte
+++ b/packages/builder/src/components/common/Dropdowns/DropdownItem.svelte
@ -11,9 +11,7 @@
  on:click
  class:big={subtitle != null}
  {...$$restProps}>
-  {#if icon}
-    <i class={icon} />
-  {/if}
+  {#if icon}<i class={icon} />{/if}
  <div class="content">
    <div class="title">{title}</div>
    {#if subtitle != null}
--- a/packages/builder/src/components/userInterface/BindingPanel.svelte
+++ b/packages/builder/src/components/userInterface/BindingPanel.svelte
@ -1,12 +1,6 @@
 <script>
  import groupBy from "lodash/fp/groupBy"
-  import {
-    Button,
-    TextArea,
-    Drawer,
-    Heading,
-    Spacer,
-  } from "@budibase/bbui"
+  import { Button, TextArea, Drawer, Heading, Spacer } from "@budibase/bbui"
  import { createEventDispatcher } from "svelte"

  const dispatch = createEventDispatcher()
@ -38,7 +32,9 @@
        <Heading extraSmall>Tables</Heading>
        <ul>
          {#each context as { readableBinding }}
-            <li on:click={() => addToText(readableBinding)}>{readableBinding}</li>
+            <li on:click={() => addToText(readableBinding)}>
+              {readableBinding}
+            </li>
          {/each}
        </ul>
      {/if}
@ -46,7 +42,9 @@
        <Heading extraSmall>Components</Heading>
        <ul>
          {#each instance as { readableBinding }}
-            <li on:click={() => addToText(readableBinding)}>{readableBinding}</li>
+            <li on:click={() => addToText(readableBinding)}>
+              {readableBinding}
+            </li>
          {/each}
        </ul>
      {/if}
--- a/packages/builder/src/components/userInterface/IconSelect/IconSelect.svelte
+++ b/packages/builder/src/components/userInterface/IconSelect/IconSelect.svelte
@ -2,8 +2,10 @@
  import iconData from "./icons.js"

  const categories = Object.keys(iconData)
-  const icons = Object.keys(iconData).reduce((acc, cat) => [...acc, ...Object.keys(iconData[cat])], [])
-
+  const icons = Object.keys(iconData).reduce(
+    (acc, cat) => [...acc, ...Object.keys(iconData[cat])],
+    []
+  )
 </script>

 <script>
--- a/packages/builder/src/components/userInterface/PropertyControl.svelte
+++ b/packages/builder/src/components/userInterface/PropertyControl.svelte
@ -103,20 +103,24 @@
 </div>

 <Drawer bind:this={bindingDrawer} title="Bindings">
-  <div slot="description"><Body extraSmall grey>Add the objects on the left to enrich your text.</Body></div>
+  <div slot="description">
+    <Body extraSmall grey>
+      Add the objects on the left to enrich your text.
+    </Body>
+  </div>
  <heading slot="buttons">
    <Button thin blue on:click={handleClose}>Save</Button>
  </heading>
  <div slot="body">
-    <BindingPanel {...handlevalueKey(value)}
-    close={handleClose}
-    on:update={e => (temporaryBindableValue = e.detail)}
-    {bindableProperties} />
+    <BindingPanel
+      {...handlevalueKey(value)}
+      close={handleClose}
+      on:update={e => (temporaryBindableValue = e.detail)}
+      {bindableProperties} />
  </div>
 </Drawer>

 <style>
-
  .property-control {
    position: relative;
    display: flex;
--- a/packages/builder/src/components/userInterface/TableViewSelect.svelte
+++ b/packages/builder/src/components/userInterface/TableViewSelect.svelte
@ -1,5 +1,12 @@
 <script>
-  import { Button, Icon, DropdownMenu, Spacer, Heading, Drawer } from "@budibase/bbui"
+  import {
+    Button,
+    Icon,
+    DropdownMenu,
+    Spacer,
+    Heading,
+    Drawer,
+  } from "@budibase/bbui"
  import { createEventDispatcher } from "svelte"
  import { store, backendUiStore, currentAsset } from "builderStore"
  import { notifier } from "builderStore/store/notifications"
@ -91,34 +98,34 @@
 </div>
 {#if value.type === 'query'}
  <i class="ri-settings-5-line" on:click={drawer.show} />
-    <Drawer title={'Query'}>
-      <div slot="buttons">
-        <Button
-          blue
-          thin
-          on:click={() => {
-            notifier.success('Query parameters saved.')
-            handleSelected(value)
-            drawer.hide()
-          }}>
-          Save
-        </Button>
-      </div>
-      <div class="drawer-contents" slot="body">
-        <IntegrationQueryEditor
-          query={value}
-          schema={fetchDatasourceSchema(value)}
-          editable={false} />
-        <Spacer large />
-        {#if value.parameters.length > 0}
-          <ParameterBuilder
-            bind:customParams={value.queryParams}
-            parameters={queries.find(query => query._id === value._id).parameters}
-            bindings={queryBindableProperties} />
-        {/if}
-      </div>
-    </Drawer>
-  {/if}
+  <Drawer title={'Query'}>
+    <div slot="buttons">
+      <Button
+        blue
+        thin
+        on:click={() => {
+          notifier.success('Query parameters saved.')
+          handleSelected(value)
+          drawer.hide()
+        }}>
+        Save
+      </Button>
+    </div>
+    <div class="drawer-contents" slot="body">
+      <IntegrationQueryEditor
+        query={value}
+        schema={fetchDatasourceSchema(value)}
+        editable={false} />
+      <Spacer large />
+      {#if value.parameters.length > 0}
+        <ParameterBuilder
+          bind:customParams={value.queryParams}
+          parameters={queries.find(query => query._id === value._id).parameters}
+          bindings={queryBindableProperties} />
+      {/if}
+    </div>
+  </Drawer>
+{/if}
 <DropdownMenu bind:this={dropdownRight} anchor={anchorRight}>
  <div class="dropdown">
    <div class="title">
--- a/packages/builder/yarn.lock
+++ b/packages/builder/yarn.lock
@ -5324,11 +5324,6 @@ ms@2.1.2, ms@^2.1.1:
  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
  integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==

-mustache@^4.0.1:
-  version "4.0.1"
-  resolved "https://registry.yarnpkg.com/mustache/-/mustache-4.0.1.tgz#d99beb031701ad433338e7ea65e0489416c854a2"
-  integrity sha512-yL5VE97+OXn4+Er3THSmTdCFCtx5hHWzrolvH+JObZnUYwuaG7XV+Ch4fR2cIrcYI0tFHxS7iyFYl14bW8y2sA==
-
 nan@^2.12.1:
  version "2.14.2"
  resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.2.tgz#f5376400695168f4cc694ac9393d0c9585eeea19"
--- a/packages/client/package.json
+++ b/packages/client/package.json
@ -9,8 +9,8 @@
    "dev:builder": "rollup -cw"
  },
  "dependencies": {
+    "@budibase/string-templates": "^0.5.3",
    "deep-equal": "^2.0.1",
-    "mustache": "^4.0.1",
    "regexparam": "^1.3.0",
    "shortid": "^2.2.15",
    "svelte-spa-router": "^3.0.5"
--- a/packages/client/src/components/Component.svelte
+++ b/packages/client/src/components/Component.svelte
@ -17,11 +17,14 @@
  const componentStore = writable({})
  setContext("component", componentStore)

+  // Enrich component props
+  let enrichedProps
+  $: enrichComponentProps(definition, $dataContext, $bindingStore)
+
  // Extract component definition info
  $: constructor = getComponentConstructor(definition._component)
  $: children = definition._children
  $: id = definition._id
-  $: enrichedProps = enrichProps(definition, $dataContext, $bindingStore)
  $: styles = definition._styles

  // Allow component selection in the builder preview if we're previewing a
@ -30,7 +33,11 @@
    $builderStore.previewType === "layout" || screenslotContext

  // Update component context
-  $: componentStore.set({ id, children: children.length, styles: { ...styles, id, allowSelection } })
+  $: componentStore.set({
+    id,
+    children: children.length,
+    styles: { ...styles, id, allowSelection },
+  })

  // Gets the component constructor for the specified component
  const getComponentConstructor = component => {
@ -39,6 +46,11 @@
    return name === "screenslot" ? Router : ComponentLibrary[name]
  }

+  // Enriches any string component props using handlebars
+  const enrichComponentProps = async (definition, context, bindingStore) => {
+    enrichedProps = await enrichProps(definition, context, bindingStore)
+  }
+
  // Returns a unique key to let svelte know when to remount components.
  // If a component is selected we want to remount it every time any props
  // change.
@ -48,7 +60,7 @@
  }
 </script>

-{#if constructor}
+{#if constructor && enrichedProps}
  <svelte:component this={constructor} {...enrichedProps}>
    {#if children && children.length}
      {#each children as child (getChildKey(child._id))}
--- a/packages/client/src/utils/buttonActions.js
+++ b/packages/client/src/utils/buttonActions.js
@ -5,26 +5,31 @@ import { saveRow, deleteRow, executeQuery, triggerAutomation } from "../api"
 const saveRowHandler = async (action, context) => {
  let draft = context[`${action.parameters.contextPath}_draft`]
  if (action.parameters.fields) {
-    Object.entries(action.parameters.fields).forEach(([key, entry]) => {
-      draft[key] = enrichDataBinding(entry.value, context)
-    })
+    for (let [key, entry] of Object.entries(action.parameters.fields)) {
+      draft[key] = await enrichDataBinding(entry.value, context)
+    }
  }
  await saveRow(draft)
 }

 const deleteRowHandler = async (action, context) => {
  const { tableId, revId, rowId } = action.parameters
+  const [enrichTable, enrichRow, enrichRev] = await Promise.all([
+    enrichDataBinding(tableId, context),
+    enrichDataBinding(rowId, context),
+    enrichDataBinding(revId, context),
+  ])
  await deleteRow({
-    tableId: enrichDataBinding(tableId, context),
-    rowId: enrichDataBinding(rowId, context),
-    revId: enrichDataBinding(revId, context),
+    tableId: enrichTable,
+    rowId: enrichRow,
+    revId: enrichRev,
  })
 }

 const triggerAutomationHandler = async (action, context) => {
  const params = {}
  for (let field in action.parameters.fields) {
-    params[field] = enrichDataBinding(
+    params[field] = await enrichDataBinding(
      action.parameters.fields[field].value,
      context
    )
--- a/packages/client/src/utils/componentProps.js
+++ b/packages/client/src/utils/componentProps.js
@ -5,7 +5,7 @@ import { enrichButtonActions } from "./buttonActions"
 * Enriches component props.
 * Data bindings are enriched, and button actions are enriched.
 */
-export const enrichProps = (props, dataContexts, dataBindings) => {
+export const enrichProps = async (props, dataContexts, dataBindings) => {
  // Exclude all private props that start with an underscore
  let validProps = {}
  Object.entries(props)
@ -24,7 +24,7 @@ export const enrichProps = (props, dataContexts, dataBindings) => {
  }

  // Enrich all data bindings in top level props
-  let enrichedProps = enrichDataBindings(validProps, context)
+  let enrichedProps = await enrichDataBindings(validProps, context)

  // Enrich button actions if they exist
  if (props._component.endsWith("/button") && enrichedProps.onClick) {
--- a/packages/client/src/utils/enrichDataBinding.js
+++ b/packages/client/src/utils/enrichDataBinding.js
@ -1,46 +1,30 @@
-import mustache from "mustache"
+import { processString } from "@budibase/string-templates"

-// this is a much more liberal version of mustache's escape function
-// ...just ignoring < and > to prevent tags from user input
-// original version here https://github.com/janl/mustache.js/blob/4b7908f5c9fec469a11cfaed2f2bed23c84e1c5c/mustache.js#L78
-const entityMap = {
-  "<": "&lt;",
-  ">": "&gt;",
-}
-mustache.escape = text => {
-  if (text == null || typeof text !== "string") {
-    return text
-  }
-  return text.replace(/[<>]/g, function fromEntityMap(s) {
-    return entityMap[s] || s
-  })
-}
-
-// Regex to test inputs with to see if they are likely candidates for mustache
-const looksLikeMustache = /{{.*}}/
+// Regex to test inputs with to see if they are likely candidates for template strings
+const looksLikeTemplate = /{{.*}}/

 /**
 * Enriches a given input with a row from the database.
 */
-export const enrichDataBinding = (input, context) => {
+export const enrichDataBinding = async (input, context) => {
  // Only accept string inputs
  if (!input || typeof input !== "string") {
    return input
  }
-  // Do a fast regex check if this looks like a mustache string
-  if (!looksLikeMustache.test(input)) {
+  // Do a fast regex check if this looks like a template string
+  if (!looksLikeTemplate.test(input)) {
    return input
  }
-  return mustache.render(input, context)
+  return processString(input, context)
 }

 /**
 * Enriches each prop in a props object
 */
-export const enrichDataBindings = (props, context) => {
+export const enrichDataBindings = async (props, context) => {
  let enrichedProps = {}
-  Object.entries(props).forEach(([key, value]) => {
-    enrichedProps[key] = enrichDataBinding(value, context)
-  })
+  for (let [key, value] of Object.entries(props)) {
+    enrichedProps[key] = await enrichDataBinding(value, context)
+  }
  return enrichedProps
 }
--- a/packages/server/package.json
+++ b/packages/server/package.json
@ -51,6 +51,7 @@
  "dependencies": {
    "@elastic/elasticsearch": "^7.10.0",
    "@budibase/client": "^0.5.3",
+    "@budibase/string-templates": "^0.5.3",
    "@koa/router": "^8.0.0",
    "@sendgrid/mail": "^7.1.1",
    "@sentry/node": "^5.19.2",
@ -67,7 +68,6 @@
    "electron-util": "^0.14.2",
    "fix-path": "^3.0.0",
    "fs-extra": "^8.1.0",
-    "handlebars": "^4.7.6",
    "jimp": "^0.16.1",
    "joi": "^17.2.1",
    "jsonschema": "^1.4.0",
@ -82,7 +82,6 @@
    "lodash": "^4.17.13",
    "mongodb": "^3.6.3",
    "mssql": "^6.2.3",
-    "mustache": "^4.0.1",
    "node-fetch": "^2.6.0",
    "open": "^7.3.0",
    "pg": "^8.5.1",
--- a/packages/server/src/api/controllers/application.js
+++ b/packages/server/src/api/controllers/application.js
@ -29,7 +29,7 @@ const {
  createLoginScreen,
 } = require("../../constants/screens")
 const { cloneDeep } = require("lodash/fp")
-const { recurseMustache } = require("../../utilities/mustache")
+const { processObject } = require("@budibase/string-templates")
 const { getAllApps } = require("../../utilities")
 const { USERS_TABLE_SCHEMA } = require("../../constants")
 const {
@ -232,8 +232,7 @@ const createEmptyAppPackage = async (ctx, app) => {
  let screensAndLayouts = []
  for (let layout of BASE_LAYOUTS) {
    const cloned = cloneDeep(layout)
-    cloned.title = app.name
-    screensAndLayouts.push(recurseMustache(cloned, app))
+    screensAndLayouts.push(await processObject(cloned, app))
  }

  const homeScreen = createHomeScreen(app)
--- a/packages/server/src/api/controllers/static/index.js
+++ b/packages/server/src/api/controllers/static/index.js
@ -7,7 +7,7 @@ const fs = require("fs-extra")
 const uuid = require("uuid")
 const AWS = require("aws-sdk")
 const { prepareUpload } = require("../deploy/utils")
-const handlebars = require("handlebars")
+const { processString } = require("@budibase/string-templates")
 const {
  budibaseAppsDir,
  budibaseTempDir,
@ -176,11 +176,8 @@ exports.serveApp = async function(ctx) {
    objectStoreUrl: objectStoreUrl(),
  })

-  const template = handlebars.compile(
-    fs.readFileSync(`${__dirname}/templates/app.hbs`, "utf8")
-  )
-
-  ctx.body = template({
+  const appHbs = fs.readFileSync(`${__dirname}/templates/app.hbs`, "utf8")
+  ctx.body = await processString(appHbs, {
    head,
    body: html,
    style: css.code,
--- a/packages/server/src/api/controllers/static/templates/BudibaseApp.svelte
+++ b/packages/server/src/api/controllers/static/templates/BudibaseApp.svelte
@ -22,7 +22,9 @@
  <title>{title}</title>
  <link rel="icon" type="image/png" href={favicon} />
  <link rel="stylesheet" href="https://rsms.me/inter/inter.css" />
-  <link href="https://cdn.jsdelivr.net/npm/remixicon@2.5.0/fonts/remixicon.css" rel="stylesheet">
+  <link
+    href="https://cdn.jsdelivr.net/npm/remixicon@2.5.0/fonts/remixicon.css"
+    rel="stylesheet" />
  <style>
    html,
    body {
--- a/packages/server/src/automations/automationUtils.js
+++ b/packages/server/src/automations/automationUtils.js
@ -1,10 +1,11 @@
 const CouchDB = require("../db")

 /**
- * When values are input to the system generally they will be of type string as this is required for mustache. This can
- * generate some odd scenarios as the Schema of the automation requires a number but the builder might supply a string
- * with mustache syntax to get the number from the rest of the context. To support this the server has to make sure that
- * the post mustache statement can be cast into the correct type, this function does this for numbers and booleans.
+ * When values are input to the system generally they will be of type string as this is required for template strings.
+ * This can generate some odd scenarios as the Schema of the automation requires a number but the builder might supply
+ * a string with template syntax to get the number from the rest of the context. To support this the server has to
+ * make sure that the post template statement can be cast into the correct type, this function does this for numbers
+ * and booleans.
 *
 * @param {object} inputs An object of inputs, please note this will not recurse down into any objects within, it simply
 * cleanses the top level inputs, however it can be used by recursively calling it deeper into the object structures if
@ -54,7 +55,7 @@ module.exports.cleanInputValues = (inputs, schema) => {
 *
 * @param {string} appId The instance which the Table/Table is contained under.
 * @param {string} tableId The ID of the Table/Table which the schema is to be retrieved for.
- * @param {object} row The input row structure which requires clean-up after having been through mustache statements.
+ * @param {object} row The input row structure which requires clean-up after having been through template statements.
 * @returns {Promise<Object>} The cleaned up rows object, will should now have all the required primitive types.
 */
 module.exports.cleanUpRow = async (appId, tableId, row) => {
@ -66,11 +67,11 @@ module.exports.cleanUpRow = async (appId, tableId, row) => {

 /**
 * A utility function for the cleanUpRow, which can be used if only the row ID is known (not the table ID) to clean
- * up a row after mustache statements have been replaced. This is specifically useful for the update row action.
+ * up a row after template statements have been replaced. This is specifically useful for the update row action.
 *
 * @param {string} appId The instance which the Table/Table is contained under.
 * @param {string} rowId The ID of the row from which the tableId will be extracted, to get the Table/Table schema.
- * @param {object} row The input row structure which requires clean-up after having been through mustache statements.
+ * @param {object} row The input row structure which requires clean-up after having been through template statements.
 * @returns {Promise<Object>} The cleaned up rows object, which will now have all the required primitive types.
 */
 module.exports.cleanUpRowById = async (appId, rowId, row) => {
--- a/packages/server/src/automations/thread.js
+++ b/packages/server/src/automations/thread.js
@ -1,13 +1,8 @@
-const handlebars = require("handlebars")
 const actions = require("./actions")
 const logic = require("./logic")
 const automationUtils = require("./automationUtils")
 const AutomationEmitter = require("../events/AutomationEmitter")
-const { recurseMustache } = require("../utilities/mustache")
-
-handlebars.registerHelper("object", value => {
-  return new handlebars.SafeString(JSON.stringify(value))
-})
+const { processObject } = require("@budibase/string-templates")

 const FILTER_STEP_ID = logic.BUILTIN_DEFINITIONS.FILTER.stepId

@ -24,7 +19,7 @@ class Orchestrator {
    // remove from context
    delete triggerOutput.appId
    delete triggerOutput.metadata
-    // step zero is never used as the mustache is zero indexed for customer facing
+    // step zero is never used as the template string is zero indexed for customer facing
    this._context = { steps: [{}], trigger: triggerOutput }
    this._automation = automation
    // create an emitter which has the chain count for this automation run in it, so it can block
@ -49,7 +44,7 @@ class Orchestrator {
    let automation = this._automation
    for (let step of automation.definition.steps) {
      let stepFn = await this.getStepFunctionality(step.type, step.stepId)
-      step.inputs = recurseMustache(step.inputs, this._context)
+      step.inputs = await processObject(step.inputs, this._context)
      step.inputs = automationUtils.cleanInputValues(
        step.inputs,
        step.schema.inputs
--- a/packages/server/src/events/index.js
+++ b/packages/server/src/events/index.js
@ -9,7 +9,7 @@ const { rowEmission, tableEmission } = require("./utils")

 /**
 * Extending the standard emitter to some syntactic sugar and standardisation to the emitted event.
- * This is specifically quite important for mustache used in automations.
+ * This is specifically quite important for template strings used in automations.
 */
 class BudibaseEmitter extends EventEmitter {
  emitRow(eventName, appId, row, table = null) {
--- a/packages/server/src/utilities/initialiseBudibase.js
+++ b/packages/server/src/utilities/initialiseBudibase.js
@ -1,6 +1,6 @@
 const { existsSync, readFile, writeFile, ensureDir } = require("fs-extra")
 const { join, resolve } = require("./centralPath")
-const handlebars = require("handlebars")
+const { processString } = require("@budibase/string-templates")
 const uuid = require("uuid")

 module.exports = async opts => {
@ -31,8 +31,7 @@ const createDevEnvFile = async opts => {
      }
    )
    opts.cookieKey1 = opts.cookieKey1 || uuid.v4()
-    const envTemplate = handlebars.compile(template)
-    const config = envTemplate(opts)
+    const config = await processString(template, opts)
    await writeFile(destConfigFile, config, { flag: "w+" })
  }
 }
--- a/packages/server/src/utilities/mustache.js
+++ b/packages/server/src/utilities/mustache.js
@ -1,73 +0,0 @@
-const handlebars = require("handlebars")
-
-handlebars.registerHelper("object", value => {
-  return new handlebars.SafeString(JSON.stringify(value))
-})
-
-/**
- * When running mustache statements to execute on the context of the automation it possible user's may input mustache
- * in a few different forms, some of which are invalid but are logically valid. An example of this would be the mustache
- * statement "{{steps[0].revision}}" here it is obvious the user is attempting to access an array or object using array
- * like operators. These are not supported by Mustache and therefore the statement will fail. This function will clean up
- * the mustache statement so it instead reads as "{{steps.0.revision}}" which is valid and will work. It may also be expanded
- * to include any other mustache statement cleanup that has been deemed necessary for the system.
- *
- * @param {string} string The string which *may* contain mustache statements, it is OK if it does not contain any.
- * @returns {string} The string that was input with cleaned up mustache statements as required.
- */
-function cleanMustache(string) {
-  let charToReplace = {
-    "[": ".",
-    "]": "",
-  }
-  let regex = new RegExp(/{{[^}}]*}}/g)
-  let matches = string.match(regex)
-  if (matches == null) {
-    return string
-  }
-  for (let match of matches) {
-    let baseIdx = string.indexOf(match)
-    for (let key of Object.keys(charToReplace)) {
-      let idxChar = match.indexOf(key)
-      if (idxChar !== -1) {
-        string =
-          string.slice(baseIdx, baseIdx + idxChar) +
-          charToReplace[key] +
-          string.slice(baseIdx + idxChar + 1)
-      }
-    }
-  }
-  return string
-}
-
-/**
- * Given an input object this will recurse through all props to try and update
- * any handlebars/mustache statements within.
- * @param {object|array} inputs The input structure which is to be recursed, it is important to note that
- * if the structure contains any cycles then this will fail.
- * @param {object} context The context that handlebars should fill data from.
- * @returns {object|array} The structure input, as fully updated as possible.
- */
-function recurseMustache(inputs, context) {
-  // JSON stringify will fail if there are any cycles, stops infinite recursion
-  try {
-    JSON.stringify(inputs)
-  } catch (err) {
-    throw "Unable to process inputs to JSON, cannot recurse"
-  }
-  for (let key of Object.keys(inputs)) {
-    let val = inputs[key]
-    if (typeof val === "string") {
-      val = cleanMustache(inputs[key])
-      const template = handlebars.compile(val)
-      inputs[key] = template(context)
-    }
-    // this covers objects and arrays
-    else if (typeof val === "object") {
-      inputs[key] = recurseMustache(inputs[key], context)
-    }
-  }
-  return inputs
-}
-
-exports.recurseMustache = recurseMustache
--- a/packages/server/yarn.lock
+++ b/packages/server/yarn.lock
@ -228,6 +228,16 @@
    lodash "^4.17.19"
    to-fast-properties "^2.0.0"

+"@budibase/client@^0.5.3":
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/@budibase/client/-/client-0.5.3.tgz#d2406b9a5b25ac446ba0f776b0ef3a38777a131a"
+  integrity sha512-pv8pMH5vxgvIAEl+2zjp1ScWAtqVWqeH65e9EDqX6oVK2AsnJe9r0HxywOHN5mCgOFxou972+39c6fYR9/enyw==
+  dependencies:
+    deep-equal "^2.0.1"
+    mustache "^4.0.1"
+    regexparam "^1.3.0"
+    svelte-spa-router "^3.0.5"
+
 "@cnakazawa/watch@^1.0.3":
  version "1.0.4"
  resolved "https://registry.yarnpkg.com/@cnakazawa/watch/-/watch-1.0.4.tgz#f864ae85004d0fcab6f50be9141c4da368d1656a"
@ -3588,18 +3598,6 @@ growly@^1.3.0:
  resolved "https://registry.yarnpkg.com/growly/-/growly-1.3.0.tgz#f10748cbe76af964b7c96c93c6bcc28af120c081"
  integrity sha1-8QdIy+dq+WS3yWyTxrzCivEgwIE=

-handlebars@^4.7.6:
-  version "4.7.6"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.7.6.tgz#d4c05c1baf90e9945f77aa68a7a219aa4a7df74e"
-  integrity sha512-1f2BACcBfiwAfStCKZNrUCgqNZkGsAT7UM3kkYtXuLo0KnaVfjKOyf7PRzB6++aK9STyT1Pd2ZCPe3EGOXleXA==
-  dependencies:
-    minimist "^1.2.5"
-    neo-async "^2.6.0"
-    source-map "^0.6.1"
-    wordwrap "^1.0.0"
-  optionalDependencies:
-    uglify-js "^3.1.4"
-
 har-schema@^2.0.0:
  version "2.0.0"
  resolved "https://registry.yarnpkg.com/har-schema/-/har-schema-2.0.0.tgz#a94c2224ebcac04782a0d9035521f24735b7ec92"
--- a/packages/standard-components/src/Icon.svelte
+++ b/packages/standard-components/src/Icon.svelte
@ -8,13 +8,12 @@
  export let size = "fa-lg"
  export let color = "#f00"
  $: styles = {
-  ...$component.styles,
-  normal: {
-    ...$component.styles.normal,
-    color
+    ...$component.styles,
+    normal: {
+      ...$component.styles.normal,
+      color,
+    },
  }
-}
 </script>

-<i use:styleable={styles}
-  class="{icon} {size}" />
+<i use:styleable={styles} class="{icon} {size}" />
--- a/packages/standard-components/src/List.svelte
+++ b/packages/standard-components/src/List.svelte
@ -28,7 +28,7 @@
    {#each rows as row}
      <DataProvider {row}>
        {#if $component.children === 0}
-         <p>Add some components too.</p>
+          <p>Add some components too.</p>
        {:else}
          <slot />
        {/if}
--- a/packages/string-templates/.eslintrc
+++ b/packages/string-templates/.eslintrc
@ -0,0 +1,12 @@
+{
+  "globals": {
+    "emit": true,
+    "key": true
+  },
+  "env": {
+    "node": true
+  },
+  "extends": ["eslint:recommended"],
+  "rules": {
+  }
+}
--- a/packages/string-templates/.gitignore
+++ b/packages/string-templates/.gitignore
@ -0,0 +1,2 @@
+dist/
+node_modules/
--- a/packages/string-templates/jest.config.js
+++ b/packages/string-templates/jest.config.js
@ -0,0 +1,194 @@
+/*
+ * For a detailed explanation regarding each configuration property, visit:
+ * https://jestjs.io/docs/en/configuration.html
+ */
+
+module.exports = {
+  // All imported modules in your tests should be mocked automatically
+  // automock: false,
+
+  // Stop running tests after `n` failures
+  // bail: 0,
+
+  // The directory where Jest should store its cached dependency information
+  // cacheDirectory: "/tmp/jest_rs",
+
+  // Automatically clear mock calls and instances between every test
+  clearMocks: true,
+
+  // Indicates whether the coverage information should be collected while executing the test
+  // collectCoverage: false,
+
+  // An array of glob patterns indicating a set of files for which coverage information should be collected
+  // collectCoverageFrom: undefined,
+
+  // The directory where Jest should output its coverage files
+  coverageDirectory: "coverage",
+
+  // An array of regexp pattern strings used to skip coverage collection
+  // coveragePathIgnorePatterns: [
+  //   "/node_modules/"
+  // ],
+
+  // Indicates which provider should be used to instrument code for coverage
+  coverageProvider: "v8",
+
+  // A list of reporter names that Jest uses when writing coverage reports
+  // coverageReporters: [
+  //   "json",
+  //   "text",
+  //   "lcov",
+  //   "clover"
+  // ],
+
+  // An object that configures minimum threshold enforcement for coverage results
+  // coverageThreshold: undefined,
+
+  // A path to a custom dependency extractor
+  // dependencyExtractor: undefined,
+
+  // Make calling deprecated APIs throw helpful error messages
+  // errorOnDeprecated: false,
+
+  // Force coverage collection from ignored files using an array of glob patterns
+  // forceCoverageMatch: [],
+
+  // A path to a module which exports an async function that is triggered once before all test suites
+  // globalSetup: undefined,
+
+  // A path to a module which exports an async function that is triggered once after all test suites
+  // globalTeardown: undefined,
+
+  // A set of global variables that need to be available in all test environments
+  // globals: {},
+
+  // The maximum amount of workers used to run your tests. Can be specified as % or a number. E.g. maxWorkers: 10% will use 10% of your CPU amount + 1 as the maximum worker number. maxWorkers: 2 will use a maximum of 2 workers.
+  // maxWorkers: "50%",
+
+  // An array of directory names to be searched recursively up from the requiring module's location
+  // moduleDirectories: [
+  //   "node_modules"
+  // ],
+
+  // An array of file extensions your modules use
+  // moduleFileExtensions: [
+  //   "js",
+  //   "json",
+  //   "jsx",
+  //   "ts",
+  //   "tsx",
+  //   "node"
+  // ],
+
+  // A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
+  // moduleNameMapper: {},
+
+  // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
+  // modulePathIgnorePatterns: [],
+
+  // Activates notifications for test results
+  // notify: false,
+
+  // An enum that specifies notification mode. Requires { notify: true }
+  // notifyMode: "failure-change",
+
+  // A preset that is used as a base for Jest's configuration
+  // preset: undefined,
+
+  // Run tests from one or more projects
+  // projects: undefined,
+
+  // Use this configuration option to add custom reporters to Jest
+  // reporters: undefined,
+
+  // Automatically reset mock state between every test
+  // resetMocks: false,
+
+  // Reset the module registry before running each individual test
+  // resetModules: false,
+
+  // A path to a custom resolver
+  // resolver: undefined,
+
+  // Automatically restore mock state between every test
+  // restoreMocks: false,
+
+  // The root directory that Jest should scan for tests and modules within
+  // rootDir: undefined,
+
+  // A list of paths to directories that Jest should use to search for files in
+  // roots: [
+  //   "<rootDir>"
+  // ],
+
+  // Allows you to use a custom runner instead of Jest's default test runner
+  // runner: "jest-runner",
+
+  // The paths to modules that run some code to configure or set up the testing environment before each test
+  // setupFiles: [],
+
+  // A list of paths to modules that run some code to configure or set up the testing framework before each test
+  // setupFilesAfterEnv: [],
+
+  // The number of seconds after which a test is considered as slow and reported as such in the results.
+  // slowTestThreshold: 5,
+
+  // A list of paths to snapshot serializer modules Jest should use for snapshot testing
+  // snapshotSerializers: [],
+
+  // The test environment that will be used for testing
+  testEnvironment: "node",
+
+  // Options that will be passed to the testEnvironment
+  // testEnvironmentOptions: {},
+
+  // Adds a location field to test results
+  // testLocationInResults: false,
+
+  // The glob patterns Jest uses to detect test files
+  // testMatch: [
+  //   "**/__tests__/**/*.[jt]s?(x)",
+  //   "**/?(*.)+(spec|test).[tj]s?(x)"
+  // ],
+
+  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
+  // testPathIgnorePatterns: [
+  //   "/node_modules/"
+  // ],
+
+  // The regexp pattern or array of patterns that Jest uses to detect test files
+  // testRegex: [],
+
+  // This option allows the use of a custom results processor
+  // testResultsProcessor: undefined,
+
+  // This option allows use of a custom test runner
+  // testRunner: "jasmine2",
+
+  // This option sets the URL for the jsdom environment. It is reflected in properties such as location.href
+  // testURL: "http://localhost",
+
+  // Setting this value to "fake" allows the use of fake timers for functions such as "setTimeout"
+  // timers: "real",
+
+  // A map from regular expressions to paths to transformers
+  // transform: undefined,
+
+  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
+  // transformIgnorePatterns: [
+  //   "/node_modules/",
+  //   "\\.pnp\\.[^\\/]+$"
+  // ],
+
+  // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
+  // unmockedModulePathPatterns: undefined,
+
+  // Indicates whether each individual test should be reported during the run
+  // verbose: undefined,
+
+  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
+  // watchPathIgnorePatterns: [],
+
+  // Whether to use watchman for file crawling
+  // watchman: true,
+}
--- a/packages/string-templates/package.json
+++ b/packages/string-templates/package.json
@ -0,0 +1,31 @@
+{
+  "name": "@budibase/string-templates",
+  "version": "0.5.3",
+  "description": "Handlebars wrapper for Budibase templating.",
+  "main": "dist/bundle.js",
+  "module": "dist/bundle.js",
+  "license": "AGPL-3.0",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "build": "tsc && rollup -c",
+    "dev:builder": "tsc && rollup -cw",
+    "test": "jest"
+  },
+  "dependencies": {
+    "handlebars": "^4.7.6",
+    "handlebars-helpers": "^0.10.0",
+    "handlebars-utils": "^1.0.6",
+    "helper-date": "^1.0.1",
+    "lodash": "^4.17.20"
+  },
+  "devDependencies": {
+    "@rollup/plugin-json": "^4.1.0",
+    "jest": "^26.6.3",
+    "rollup": "^2.36.2",
+    "rollup-plugin-commonjs": "^10.1.0",
+    "rollup-plugin-node-builtins": "^2.1.2",
+    "rollup-plugin-node-globals": "^1.4.0",
+    "rollup-plugin-node-resolve": "^5.2.0",
+    "typescript": "^4.1.3"
+  }
+}
--- a/packages/string-templates/rollup.config.js
+++ b/packages/string-templates/rollup.config.js
@ -0,0 +1,28 @@
+import commonjs from "rollup-plugin-commonjs"
+import resolve from "rollup-plugin-node-resolve"
+import builtins from "rollup-plugin-node-builtins"
+import globals from "rollup-plugin-node-globals"
+import json from "@rollup/plugin-json"
+
+export default {
+  input: "src/index.js",
+  output: [
+    {
+      sourcemap: true,
+      format: "umd",
+      file: "./dist/bundle.js",
+      name: "string-templates",
+      exports: "named",
+    },
+  ],
+  plugins: [
+    resolve({
+      preferBuiltins: true,
+      browser: true,
+    }),
+    commonjs(),
+    globals(),
+    builtins(),
+    json(),
+  ],
+}
--- a/packages/string-templates/src/helpers/Helper.js
+++ b/packages/string-templates/src/helpers/Helper.js
@ -0,0 +1,19 @@
+class Helper {
+  constructor(name, fn) {
+    this.name = name
+    this.fn = fn
+  }
+
+  register(handlebars) {
+    // wrap the function so that no helper can cause handlebars to break
+    handlebars.registerHelper(this.name, value => {
+      return this.fn(value) || value
+    })
+  }
+
+  unregister(handlebars) {
+    handlebars.unregisterHelper(this.name)
+  }
+}
+
+module.exports = Helper
--- a/packages/string-templates/src/helpers/constants.js
+++ b/packages/string-templates/src/helpers/constants.js
@ -0,0 +1,21 @@
+module.exports.HelperFunctionBuiltin = [
+  "#if",
+  "#unless",
+  "#each",
+  "#with",
+  "lookup",
+  "log",
+  "blockHelperMissing",
+  "each",
+  "helperMissing",
+  "if",
+  "unless",
+  "log",
+  "lookup",
+  "with",
+]
+
+module.exports.HelperFunctionNames = {
+  OBJECT: "object",
+  ALL: "all",
+}
--- a/packages/string-templates/src/helpers/external.js
+++ b/packages/string-templates/src/helpers/external.js
@ -0,0 +1,56 @@
+const helpers = require("handlebars-helpers")
+const dateHelper = require("helper-date")
+const { HelperFunctionBuiltin } = require("./constants")
+
+/**
+ * full list of supported helpers can be found here:
+ * https://github.com/helpers/handlebars-helpers
+ */
+
+const EXTERNAL_FUNCTION_COLLECTIONS = [
+  "math",
+  "array",
+  "number",
+  "url",
+  "string",
+  "markdown",
+]
+
+const DATE_NAME = "date"
+
+exports.registerAll = handlebars => {
+  handlebars.registerHelper(DATE_NAME, dateHelper)
+  let externalNames = []
+  for (let collection of EXTERNAL_FUNCTION_COLLECTIONS) {
+    // collect information about helper
+    let hbsHelperInfo = helpers[collection]()
+    for (let entry of Object.entries(hbsHelperInfo)) {
+      const name = entry[0]
+      // skip built in functions and ones seen already
+      if (
+        HelperFunctionBuiltin.indexOf(name) !== -1 ||
+        externalNames.indexOf(name) !== -1
+      ) {
+        continue
+      }
+      externalNames.push(name)
+    }
+    // attach it to our handlebars instance
+    helpers[collection]({
+      handlebars,
+    })
+  }
+  // add date external functionality
+  externalNames.push(DATE_NAME)
+  exports.externalHelperNames = externalNames
+}
+
+exports.unregisterAll = handlebars => {
+  handlebars.unregisterHelper(DATE_NAME)
+  for (let name of module.exports.externalHelperNames) {
+    handlebars.unregisterHelper(name)
+  }
+  exports.externalHelperNames = []
+}
+
+exports.externalHelperNames = []
--- a/packages/string-templates/src/helpers/index.js
+++ b/packages/string-templates/src/helpers/index.js
@ -0,0 +1,53 @@
+const Helper = require("./Helper")
+const { SafeString } = require("handlebars")
+const externalHandlebars = require("./external")
+const { HelperFunctionNames, HelperFunctionBuiltin } = require("./constants")
+
+const HTML_SWAPS = {
+  "<": "&lt;",
+  ">": "&gt;",
+}
+
+const HELPERS = [
+  // external helpers
+  new Helper(HelperFunctionNames.OBJECT, value => {
+    return new SafeString(JSON.stringify(value))
+  }),
+  // this help is applied to all statements
+  new Helper(HelperFunctionNames.ALL, value => {
+    // null/undefined values produce bad results
+    if (value == null) {
+      return ""
+    }
+    let text = new SafeString(unescape(value).replace(/&amp;/g, "&"))
+    if (text == null || typeof text !== "string") {
+      return text
+    }
+    return text.replace(/[<>]/g, tag => {
+      return HTML_SWAPS[tag] || tag
+    })
+  }),
+]
+
+module.exports.HelperNames = () => {
+  return Object.values(HelperFunctionNames).concat(
+    HelperFunctionBuiltin,
+    externalHandlebars.externalHelperNames
+  )
+}
+
+module.exports.registerAll = handlebars => {
+  for (let helper of HELPERS) {
+    helper.register(handlebars)
+  }
+  // register imported helpers
+  externalHandlebars.registerAll(handlebars)
+}
+
+module.exports.unregisterAll = handlebars => {
+  for (let helper of HELPERS) {
+    helper.unregister(handlebars)
+  }
+  // unregister all imported helpers
+  externalHandlebars.unregisterAll(handlebars)
+}
--- a/packages/string-templates/src/index.js
+++ b/packages/string-templates/src/index.js
@ -0,0 +1,105 @@
+const handlebars = require("handlebars")
+const { registerAll } = require("./helpers/index")
+const processors = require("./processors")
+const { cloneDeep } = require("lodash/fp")
+const { removeNull } = require("./utilities")
+
+const hbsInstance = handlebars.create()
+registerAll(hbsInstance)
+
+/**
+ * utility function to check if the object is valid
+ */
+function testObject(object) {
+  // JSON stringify will fail if there are any cycles, stops infinite recursion
+  try {
+    JSON.stringify(object)
+  } catch (err) {
+    throw "Unable to process inputs to JSON, cannot recurse"
+  }
+}
+
+/**
+ * Given an input object this will recurse through all props to try and update any handlebars statements within.
+ * @param {object|array} object The input structure which is to be recursed, it is important to note that
+ * if the structure contains any cycles then this will fail.
+ * @param {object} context The context that handlebars should fill data from.
+ * @returns {Promise<object|array>} The structure input, as fully updated as possible.
+ */
+module.exports.processObject = async (object, context) => {
+  testObject(object)
+  for (let key of Object.keys(object)) {
+    if (object[key] != null) {
+      let val = object[key]
+      if (typeof val === "string") {
+        object[key] = await module.exports.processString(object[key], context)
+      } else if (typeof val === "object") {
+        object[key] = await module.exports.processObject(object[key], context)
+      }
+    }
+  }
+  return object
+}
+
+/**
+ * This will process a single handlebars containing string. If the string passed in has no valid handlebars statements
+ * then nothing will occur.
+ * @param {string} string The template string which is the filled from the context object.
+ * @param {object} context An object of information which will be used to enrich the string.
+ * @returns {Promise<string>} The enriched string, all templates should have been replaced if they can be.
+ */
+module.exports.processString = async (string, context) => {
+  // TODO: carry out any async calls before carrying out async call
+  return module.exports.processStringSync(string, context)
+}
+
+/**
+ * Given an input object this will recurse through all props to try and update any handlebars statements within. This is
+ * a pure sync call and therefore does not have the full functionality of the async call.
+ * @param {object|array} object The input structure which is to be recursed, it is important to note that
+ * if the structure contains any cycles then this will fail.
+ * @param {object} context The context that handlebars should fill data from.
+ * @returns {object|array} The structure input, as fully updated as possible.
+ */
+module.exports.processObjectSync = (object, context) => {
+  testObject(object)
+  for (let key of Object.keys(object)) {
+    let val = object[key]
+    if (typeof val === "string") {
+      object[key] = module.exports.processStringSync(object[key], context)
+    } else if (typeof val === "object") {
+      object[key] = module.exports.processObjectSync(object[key], context)
+    }
+  }
+  return object
+}
+
+/**
+ * This will process a single handlebars containing string. If the string passed in has no valid handlebars statements
+ * then nothing will occur. This is a pure sync call and therefore does not have the full functionality of the async call.
+ * @param {string} string The template string which is the filled from the context object.
+ * @param {object} context An object of information which will be used to enrich the string.
+ * @returns {string} The enriched string, all templates should have been replaced if they can be.
+ */
+module.exports.processStringSync = (string, context) => {
+  const clonedContext = removeNull(cloneDeep(context))
+  // remove any null/undefined properties
+  if (typeof string !== "string") {
+    throw "Cannot process non-string types."
+  }
+  let template
+  string = processors.preprocess(string)
+  // this does not throw an error when template can't be fulfilled, have to try correct beforehand
+  template = hbsInstance.compile(string)
+  return processors.postprocess(template(clonedContext))
+}
+
+/**
+ * Errors can occur if a user of this library attempts to use a helper that has not been added to the system, these errors
+ * can be captured to alert the user of the mistake.
+ * @param {function} handler a function which will be called every time an error occurs when processing a handlebars
+ * statement.
+ */
+module.exports.errorEvents = handler => {
+  hbsInstance.registerHelper("helperMissing", handler)
+}
--- a/packages/string-templates/src/processors/index.js
+++ b/packages/string-templates/src/processors/index.js
@ -0,0 +1,26 @@
+const { FIND_HBS_REGEX } = require("../utilities")
+const preprocessor = require("./preprocessor")
+const postprocessor = require("./postprocessor")
+
+function process(string, processors) {
+  for (let processor of processors) {
+    // re-run search each time incase previous processor updated/removed a match
+    let regex = new RegExp(FIND_HBS_REGEX)
+    let matches = string.match(regex)
+    if (matches == null) {
+      continue
+    }
+    for (let match of matches) {
+      string = processor.process(string, match)
+    }
+  }
+  return string
+}
+
+module.exports.preprocess = string => {
+  return process(string, preprocessor.processors)
+}
+
+module.exports.postprocess = string => {
+  return process(string, postprocessor.processors)
+}
--- a/packages/string-templates/src/processors/postprocessor.js
+++ b/packages/string-templates/src/processors/postprocessor.js
@ -0,0 +1,9 @@
+/* eslint-disable no-unused-vars */
+class Postprocessor {
+  constructor(name, fn) {
+    this.name = name
+    this.fn = fn
+  }
+}
+
+module.exports.processors = []
--- a/packages/string-templates/src/processors/preprocessor.js
+++ b/packages/string-templates/src/processors/preprocessor.js
@ -0,0 +1,88 @@
+const { HelperNames } = require("../helpers")
+const { swapStrings, isAlphaNumeric } = require("../utilities")
+
+const PreprocessorNames = {
+  SWAP_TO_DOT: "swap-to-dot-notation",
+  HANDLE_SPACES: "handle-spaces-in-properties",
+  FINALISE: "finalise",
+}
+
+/* eslint-disable no-unused-vars */
+class Preprocessor {
+  constructor(name, fn) {
+    this.name = name
+    this.fn = fn
+  }
+
+  process(fullString, statement) {
+    const output = this.fn(statement)
+    const idx = fullString.indexOf(statement)
+    return swapStrings(fullString, idx, statement.length, output)
+  }
+}
+
+module.exports.processors = [
+  new Preprocessor(PreprocessorNames.SWAP_TO_DOT, statement => {
+    let startBraceIdx = statement.indexOf("[")
+    let lastIdx = 0
+    while (startBraceIdx !== -1) {
+      // if the character previous to the literal specifier is alpha-numeric this should happen
+      if (isAlphaNumeric(statement.charAt(startBraceIdx - 1))) {
+        statement = swapStrings(statement, startBraceIdx + lastIdx, 1, ".[")
+      }
+      lastIdx = startBraceIdx + 1
+      startBraceIdx = statement.substring(lastIdx + 1).indexOf("[")
+    }
+    return statement
+  }),
+
+  new Preprocessor(PreprocessorNames.HANDLE_SPACES, statement => {
+    // exclude helpers and brackets, regex will only find double brackets
+    const exclusions = HelperNames()
+    // find all the parts split by spaces
+    const splitBySpaces = statement
+      .split(" ")
+      .filter(el => el !== "{{" && el !== "}}")
+    // remove braces if they are found and weren't spaced out
+    splitBySpaces[0] = splitBySpaces[0].replace("{", "")
+    splitBySpaces[splitBySpaces.length - 1] = splitBySpaces[
+      splitBySpaces.length - 1
+    ].replace("}", "")
+    // remove the excluded elements
+    const propertyParts = splitBySpaces.filter(
+      part => exclusions.indexOf(part) === -1
+    )
+    // rebuild to get the full property
+    const fullProperty = propertyParts.join(" ")
+    // now work out the dot notation layers and split them up
+    const propertyLayers = fullProperty.split(".")
+    // find the layers which need to be wrapped and wrap them
+    for (let layer of propertyLayers) {
+      if (layer.indexOf(" ") !== -1) {
+        statement = swapStrings(
+          statement,
+          statement.indexOf(layer),
+          layer.length,
+          `[${layer}]`
+        )
+      }
+    }
+    // remove the edge case of double brackets being entered (in-case user already has specified)
+    return statement.replace(/\[\[/g, "[").replace(/]]/g, "]")
+  }),
+
+  new Preprocessor(Preprocessor.FINALISE, statement => {
+    let insideStatement = statement.slice(2, statement.length - 2)
+    if (insideStatement.charAt(0) === " ") {
+      insideStatement = insideStatement.slice(1)
+    }
+    if (insideStatement.charAt(insideStatement.length - 1) === " ") {
+      insideStatement = insideStatement.slice(0, insideStatement.length - 1)
+    }
+    const possibleHelper = insideStatement.split(" ")[0]
+    if (HelperNames().some(option => possibleHelper === option)) {
+      insideStatement = `(${insideStatement})`
+    }
+    return `{{ all ${insideStatement} }}`
+  }),
+]
--- a/packages/string-templates/src/utilities.js
+++ b/packages/string-templates/src/utilities.js
@ -0,0 +1,23 @@
+const ALPHA_NUMERIC_REGEX = /^[A-Za-z0-9]+$/g
+
+module.exports.FIND_HBS_REGEX = /{{([^{}])+}}/g
+
+module.exports.isAlphaNumeric = char => {
+  return char.match(ALPHA_NUMERIC_REGEX)
+}
+
+module.exports.swapStrings = (string, start, length, swap) => {
+  return string.slice(0, start) + swap + string.slice(start + length)
+}
+
+// removes null and undefined
+module.exports.removeNull = obj => {
+  return Object.fromEntries(
+    Object.entries(obj)
+      .filter(entry => entry[1] != null)
+      .map(([key, value]) => [
+        key,
+        value === Object(value) ? module.exports.removeNull(value) : value,
+      ])
+  )
+}
--- a/packages/string-templates/test/basic.spec.js
+++ b/packages/string-templates/test/basic.spec.js
@ -0,0 +1,84 @@
+const {
+  processObject,
+  processString,
+} = require("../src/index")
+
+describe("Test that the string processing works correctly", () => {
+  it("should process a basic template string", async () => {
+    const output = await processString("templating is {{ adjective }}", {
+      adjective: "easy"
+    })
+    expect(output).toBe("templating is easy")
+  })
+
+  it("should process a literal template", async () => {
+    const output = await processString("derp is {{{ adjective }}}", {
+      adjective: "derp"
+    })
+    expect(output).toBe("derp is derp")
+  })
+
+  it("should fail gracefully when wrong type passed in", async () => {
+    let error = null
+    try {
+      await processString(null, null)
+    } catch (err) {
+      error = err
+    }
+    expect(error).not.toBeNull()
+  })
+
+  it("confirm that null properties are handled correctly", async () => {
+    const output = await processString("hello {{ name }} I am {{ name2 }}", {
+      name: undefined,
+      name2: null,
+    })
+    expect(output).toBe("hello  I am ")
+  })
+})
+
+describe("Test that the object processing works correctly", () => {
+  it("should be able to process an object with some template strings", async () => {
+    const output = await processObject({
+      first: "thing is {{ adjective }}",
+      second: "thing is bad",
+      third: "we are {{ adjective }} {{ noun }}",
+    }, {
+      adjective: "easy",
+      noun: "people",
+    })
+    expect(output.first).toBe("thing is easy")
+    expect(output.second).toBe("thing is bad")
+    expect(output.third).toBe("we are easy people")
+  })
+
+  it("should be able to handle arrays of string templates", async () => {
+    const output = await processObject(["first {{ noun }}", "second {{ noun }}"], {
+      noun: "person"
+    })
+    expect(output[0]).toBe("first person")
+    expect(output[1]).toBe("second person")
+  })
+
+  it("should fail gracefully when object passed in has cycles", async () => {
+    let error = null
+    try {
+      const innerObj = { a: "thing {{ a }}" }
+      innerObj.b = innerObj
+      await processObject(innerObj, { a: 1 })
+    } catch (err) {
+      error = err
+    }
+    expect(error).not.toBeNull()
+  })
+
+  it("should fail gracefully when wrong type is passed in", async () => {
+    let error = null
+    try {
+      await processObject(null, null)
+    } catch (err) {
+      error = err
+    }
+    expect(error).not.toBeNull()
+  })
+})
--- a/packages/string-templates/test/escapes.spec.js
+++ b/packages/string-templates/test/escapes.spec.js
@ -0,0 +1,51 @@
+const {
+  processString,
+} = require("../src/index")
+
+describe("Handling context properties with spaces in their name", () => {
+  it("should allow through literal specifiers", async () => {
+    const output = await processString("test {{ [test thing] }}", {
+      "test thing": 1
+    })
+    expect(output).toBe("test 1")
+  })
+
+  it("should convert to dot notation where required", async () => {
+    const output = await processString("test {{ test[0] }}", {
+      test: [2]
+    })
+    expect(output).toBe("test 2")
+  })
+
+  it("should be able to handle a property with a space in its name", async () => {
+    const output = await processString("hello my name is {{ person name }}", {
+      "person name": "Mike",
+    })
+    expect(output).toBe("hello my name is Mike")
+  })
+
+  it("should be able to handle an object with layers that requires escaping", async () => {
+    const output = await processString("testcase {{ testing.test case }}", {
+      testing: {
+        "test case": 1
+      }
+    })
+    expect(output).toBe("testcase 1")
+  })
+})
+
+describe("attempt some complex problems", () => {
+  it("should be able to handle a very complex handlebars statement", async () => {
+    const context = {
+      "New Repeater": {
+        "Get Actors": {
+          "first_name": "Bob",
+          "last_name": "Bobert"
+        },
+      },
+    }
+    const hbs = "{{ New Repeater.Get Actors.first_name }} {{ New Repeater.Get Actors.last_name }}"
+    const output = await processString(hbs, context)
+    expect(output).toBe("Bob Bobert")
+  })
+})
--- a/packages/string-templates/test/helpers.spec.js
+++ b/packages/string-templates/test/helpers.spec.js
@ -0,0 +1,13 @@
+const {
+  processString,
+} = require("../src/index")
+
+describe("test the custom helpers we have applied", () => {
+  it("should be able to use the object helper", async () => {
+    const output = await processString("object is {{ object obj }}", {
+      obj: { a: 1 },
+    })
+    expect(output).toBe("object is {\"a\":1}")
+  })
+
+})
--- a/packages/string-templates/test/renderApp.spec.js
+++ b/packages/string-templates/test/renderApp.spec.js
@ -0,0 +1,33 @@
+const { processString } = require("../src/index")
+
+describe("specific test case for whether or not full app template can still be rendered", () => {
+  it("should be able to render the app template", async () => {
+    const template =
+      `<!doctype html>
+        <html>
+        <head>
+          {{{head}}}
+        </head>
+        <script>
+          window["##BUDIBASE_APP_ID##"] = "{{appId}}"
+        </script>
+        {{{body}}}
+        </html>`
+    const context = {
+      appId: "App1",
+      head: "<title>App</title>",
+      body: "<body><p>App things</p></body>"
+    }
+    const output = await processString(template, context)
+    expect(output).toBe(`<!doctype html>
+        <html>
+        <head>
+          <title>App</title>
+        </head>
+        <script>
+          window["##BUDIBASE_APP_ID##"] = "App1"
+        </script>
+        <body><p>App things</p></body>
+        </html>`)
+  })
+})
--- a/packages/string-templates/tsconfig.json
+++ b/packages/string-templates/tsconfig.json
@ -0,0 +1,10 @@
+{
+  "include": ["src/**/*"],
+
+  "compilerOptions": {
+    "allowJs": true,
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "outDir": "dist"
+  }
+}
--- a/packages/string-templates/yarn.lock
+++ b/packages/string-templates/yarn.lock
--- a/packages/worker/.eslintrc
+++ b/packages/worker/.eslintrc
@ -0,0 +1,12 @@
+{
+  "globals": {
+    "emit": true,
+    "key": true
+  },
+  "env": {
+    "node": true
+  },
+  "extends": ["eslint:recommended"],
+  "rules": {
+  }
+}
--- a/scripts/symlinkDev.js
+++ b/scripts/symlinkDev.js
@ -35,6 +35,10 @@ const SYMLINK_PATHS = [
    symlink: `${devDir}/budibase-client.js.map`,
    destination: resolve("packages/client/dist/budibase-client.js.map"),
  },
+  {
+    symlink: `${devDir}/@budibase/string-templates`,
+    destination: resolve("packages/string-templates"),
+  },
 ]

 SYMLINK_PATHS.forEach(sym => {