Add current user bindings, and current user relationships as data sources

packages/builder/src/builderStore/dataBinding.js

@@ -2,6 +2,7 @@ import { cloneDeep } from "lodash/fp"
 import { get } from "svelte/store"
 import { backendUiStore, store } from "builderStore"
 import { findAllMatchingComponents, findComponentPath } from "./storeUtils"
+import { TableNames } from "../constants"
 
 // Regex to match all instances of template strings
 const CAPTURE_VAR_INSIDE_TEMPLATE = /{{([^}]+)}}/g
@@ -114,6 +115,37 @@ export const getContextBindings = (rootComponent, componentId) => {
       })
     })
   })
+
+  // Add logged in user bindings
+  const tables = get(backendUiStore).tables
+  const userTable = tables.find(table => table._id === TableNames.USERS)
+  const schema = {
+    ...userTable.schema,
+    _id: { type: "string" },
+    _rev: { type: "string" },
+  }
+  const keys = Object.keys(schema).sort()
+  keys.forEach(key => {
+    const fieldSchema = schema[key]
+    // Replace certain bindings with a new property to help display components
+    let runtimeBoundKey = key
+    if (fieldSchema.type === "link") {
+      runtimeBoundKey = `${key}_count`
+    } else if (fieldSchema.type === "attachment") {
+      runtimeBoundKey = `${key}_first`
+    }
+
+    contextBindings.push({
+      type: "context",
+      runtimeBinding: `user.${runtimeBoundKey}`,
+      readableBinding: `Current User.${key}`,
+      fieldSchema,
+      providerId: "user",
+      tableId: TableNames.USERS,
+      field: key,
+    })
+  })
+
   return contextBindings
 }
 

packages/client/src/api/auth.js

@@ -1,4 +1,6 @@
 import API from "./api"
+import { enrichRows } from "./rows"
+import { TableNames } from "../constants"
 
 /**
  * Performs a log in request.
@@ -15,3 +17,15 @@ export const logIn = async ({ email, password }) => {
     body: { email, password },
   })
 }
+
+/**
+ * Fetches the currently logged in user object
+ */
+export const fetchSelf = async () => {
+  const user = await API.get({ url: "/api/self" })
+  if (user?._id) {
+    return (await enrichRows([user], TableNames.USERS))[0]
+  } else {
+    return null
+  }
+}

packages/client/src/components/ClientApp.svelte

@@ -4,12 +4,7 @@
   import Component from "./Component.svelte"
   import NotificationDisplay from "./NotificationDisplay.svelte"
   import SDK from "../sdk"
-  import {
-    createDataStore,
-    initialise,
-    screenStore,
-    notificationStore,
-  } from "../store"
+  import { createDataStore, initialise, screenStore, authStore } from "../store"
 
   // Provide contexts
   setContext("sdk", SDK)
@@ -22,6 +17,7 @@
   // Load app config
   onMount(async () => {
     await initialise()
+    await authStore.actions.fetchUser()
     loaded = true
   })
 </script>

packages/client/src/components/Component.svelte

@@ -4,7 +4,7 @@
   import * as ComponentLibrary from "@budibase/standard-components"
   import Router from "./Router.svelte"
   import { enrichProps, propsAreSame } from "../utils/componentProps"
-  import { bindingStore, builderStore } from "../store"
+  import { authStore, bindingStore, builderStore } from "../store"
 
   export let definition = {}
 
@@ -23,7 +23,7 @@
   $: constructor = getComponentConstructor(definition._component)
   $: children = definition._children || []
   $: id = definition._id
-  $: enrichComponentProps(definition, $dataContext, $bindingStore)
+  $: enrichComponentProps(definition, $dataContext, $bindingStore, $authStore)
   $: updateProps(enrichedProps)
   $: styles = definition._styles
 
@@ -67,8 +67,8 @@
   }
 
   // Enriches any string component props using handlebars
-  const enrichComponentProps = async (definition, context, bindingStore) => {
-    enrichedProps = await enrichProps(definition, context, bindingStore)
+  const enrichComponentProps = async (definition, context, bindings, user) => {
+    enrichedProps = await enrichProps(definition, context, bindings, user)
   }
 
   // Returns a unique key to let svelte know when to remount components.

packages/client/src/constants.js

@@ -0,0 +1,3 @@
+export const TableNames = {
+  USERS: "ta_users",
+}

packages/client/src/store/auth.js

@@ -3,9 +3,10 @@ import { writable, get } from "svelte/store"
 import { initialise } from "./initialise"
 import { routeStore } from "./routes"
 import { builderStore } from "./builder"
+import { TableNames } from "../constants"
 
 const createAuthStore = () => {
-  const store = writable("")
+  const store = writable(null)
 
   const goToDefaultRoute = () => {
     // Setting the active route forces an update of the active screen ID,
@@ -15,16 +16,20 @@ const createAuthStore = () => {
     // Navigating updates the URL to reflect this route
     routeStore.actions.navigate("/")
   }
+
+  // Logs a user in
   const logIn = async ({ email, password }) => {
     const user = await API.logIn({ email, password })
     if (!user.error) {
-      store.set(user.token)
+      store.set(user)
       await initialise()
       goToDefaultRoute()
     }
   }
+
+  // Logs a user out
   const logOut = async () => {
-    store.set("")
+    store.set(null)
     const appId = get(builderStore).appId
     if (appId) {
       for (let environment of ["local", "cloud"]) {
@@ -35,9 +40,34 @@ const createAuthStore = () => {
     goToDefaultRoute()
   }
 
+  // Fetches the user object if someone is logged in and has reloaded the page
+  const fetchUser = async () => {
+    // Fetch the first user if inside the builder
+    if (get(builderStore).inBuilder) {
+      const users = await API.fetchTableData(TableNames.USERS)
+      if (!users.error && users[0] != null) {
+        store.set(users[0])
+      }
+    }
+
+    // Or fetch the current user from localstorage in a real app
+    else {
+      if (get(store) == null) {
+        const user = await API.fetchSelf()
+        if (user) {
+          store.set(user)
+        } else {
+          await logOut()
+        }
+      } else {
+        await logOut()
+      }
+    }
+  }
+
   return {
     subscribe: store.subscribe,
-    actions: { logIn, logOut },
+    actions: { logIn, logOut, fetchUser },
   }
 }
 

packages/client/src/utils/componentProps.js

@@ -21,7 +21,7 @@ export const propsAreSame = (a, b) => {
  * Enriches component props.
  * Data bindings are enriched, and button actions are enriched.
  */
-export const enrichProps = async (props, dataContexts, dataBindings) => {
+export const enrichProps = async (props, dataContexts, dataBindings, user) => {
   // Exclude all private props that start with an underscore
   let validProps = {}
   Object.entries(props)
@@ -35,6 +35,7 @@ export const enrichProps = async (props, dataContexts, dataBindings) => {
   const context = {
     ...dataContexts,
     ...dataBindings,
+    user,
     data: dataContexts[dataContexts.closestComponentId],
     data_draft: dataContexts[`${dataContexts.closestComponentId}_draft`],
   }

packages/server/src/api/controllers/auth.js

@@ -57,3 +57,17 @@ exports.authenticate = async ctx => {
     ctx.throw(401, "Invalid credentials.")
   }
 }
+
+exports.fetchSelf = async ctx => {
+  const { userId, appId } = ctx.user
+  if (!userId || !appId) {
+    ctx.body = {}
+  } else {
+    const database = new CouchDB(appId)
+    const user = await database.get(userId)
+    if (user) {
+      delete user.password
+    }
+    ctx.body = user
+  }
+}

packages/server/src/api/routes/auth.js

@@ -4,5 +4,6 @@ const controller = require("../controllers/auth")
 const router = Router()
 
 router.post("/api/authenticate", controller.authenticate)
+router.get("/api/self", controller.fetchSelf)
 
 module.exports = router