Automatically determine which state keys are available

packages/builder/src/builderStore/dataBinding.js

@@ -1,6 +1,10 @@
 import { cloneDeep } from "lodash/fp"
 import { get } from "svelte/store"
-import { findComponent, findComponentPath } from "./storeUtils"
+import {
+  findComponent,
+  findComponentPath,
+  findAllMatchingComponents,
+} from "./storeUtils"
 import { store } from "builderStore"
 import { tables as tablesStore, queries as queriesStores } from "stores/backend"
 import { makePropSafe } from "@budibase/string-templates"
@@ -262,13 +266,12 @@ const getDeviceBindings = () => {
  * Gets all state bindings that are globally available.
  */
 const getStateBindings = () => {
-  return [
-    {
+  const safeState = makePropSafe("state")
+  return getAllStateVariables().map(key => ({
     type: "context",
-      runtimeBinding: makePropSafe("state"),
-      readableBinding: `State`,
-    },
-  ]
+    runtimeBinding: `${safeState}.${makePropSafe(key)}`,
+    readableBinding: `State.${key}`,
+  }))
 }
 
 /**
@@ -473,3 +476,49 @@ export function runtimeToReadableBinding(bindableProperties, textWithBindings) {
     "readableBinding"
   )
 }
+
+/**
+ * Returns an array of the keys of any state variables which are set anywhere
+ * in the app.
+ */
+export const getAllStateVariables = () => {
+  let allComponents = []
+
+  // Find all onClick settings in all layouts
+  get(store).layouts.forEach(layout => {
+    const components = findAllMatchingComponents(
+      layout.props,
+      c => c.onClick != null
+    )
+    allComponents = allComponents.concat(components || [])
+  })
+
+  // Find all onClick settings in all screens
+  get(store).screens.forEach(screen => {
+    const components = findAllMatchingComponents(
+      screen.props,
+      c => c.onClick != null
+    )
+    allComponents = allComponents.concat(components || [])
+  })
+
+  // Add state bindings for all state actions
+  let bindingSet = new Set()
+  allComponents.forEach(component => {
+    if (!Array.isArray(component.onClick)) {
+      return
+    }
+    component.onClick.forEach(action => {
+      if (
+        action["##eventHandlerType"] === "Update State" &&
+        action.parameters?.type === "set" &&
+        action.parameters?.key &&
+        action.parameters?.value
+      ) {
+        bindingSet.add(action.parameters.key)
+      }
+    })
+  })
+
+  return Array.from(bindingSet)
+}

packages/builder/src/components/design/PropertiesPanel/PropertyControls/EventsEditor/actions/UpdateState.svelte

@@ -1,11 +1,13 @@
 <script>
-  import { Select, Label, Input } from "@budibase/bbui"
+  import { Select, Label, Combobox } from "@budibase/bbui"
   import { onMount } from "svelte"
   import DrawerBindableInput from "components/common/bindings/DrawerBindableInput.svelte"
+  import { getAllStateVariables } from "builderStore/dataBinding"
 
   export let parameters
   export let bindings = []
 
+  const keyOptions = getAllStateVariables()
   const typeOptions = [
     {
       label: "Set value",
@@ -32,7 +34,7 @@
     options={typeOptions}
   />
   <Label small>Key</Label>
-  <Input bind:value={parameters.key} />
+  <Combobox bind:value={parameters.key} options={keyOptions} />
   {#if parameters.type === "set"}
     <Label small>Value</Label>
     <DrawerBindableInput