Add client app state and button actions to control it

packages/builder/src/builderStore/dataBinding.js

@@ -18,7 +18,9 @@ export const getBindableProperties = (asset, componentId) => {
   const userBindings = getUserBindings()
   const urlBindings = getUrlBindings(asset)
   const deviceBindings = getDeviceBindings()
+  const stateBindings = getStateBindings()
   return [
+    ...stateBindings,
     ...deviceBindings,
     ...urlBindings,
     ...contextBindings,
@@ -256,6 +258,19 @@ const getDeviceBindings = () => {
   return bindings
 }
 
+/**
+ * Gets all state bindings that are globally available.
+ */
+const getStateBindings = () => {
+  return [
+    {
+      type: "context",
+      runtimeBinding: makePropSafe("state"),
+      readableBinding: `State`,
+    },
+  ]
+}
+
 /**
  * Gets all bindable properties from URL parameters.
  */

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

@@ -0,0 +1,56 @@
+<script>
+  import { Select, Label, Input } from "@budibase/bbui"
+  import { onMount } from "svelte"
+  import DrawerBindableInput from "components/common/bindings/DrawerBindableInput.svelte"
+
+  export let parameters
+  export let bindings = []
+
+  const typeOptions = [
+    {
+      label: "Set value",
+      value: "set",
+    },
+    {
+      label: "Delete value",
+      value: "delete",
+    },
+  ]
+
+  onMount(() => {
+    if (!parameters.type) {
+      parameters.type = "set"
+    }
+  })
+</script>
+
+<div class="root">
+  <Label small>Type</Label>
+  <Select
+    placeholder={null}
+    bind:value={parameters.type}
+    options={typeOptions}
+  />
+  <Label small>Key</Label>
+  <Input bind:value={parameters.key} />
+  {#if parameters.type === "set"}
+    <Label small>Value</Label>
+    <DrawerBindableInput
+      {bindings}
+      value={parameters.value}
+      on:change={e => (parameters.value = e.detail)}
+    />
+  {/if}
+</div>
+
+<style>
+  .root {
+    display: grid;
+    column-gap: var(--spacing-l);
+    row-gap: var(--spacing-s);
+    grid-template-columns: 60px 1fr;
+    align-items: center;
+    max-width: 400px;
+    margin: 0 auto;
+  }
+</style>

packages/builder/src/components/design/PropertiesPanel/PropertyControls/EventsEditor/actions/index.js

@@ -8,6 +8,7 @@ import LogOut from "./LogOut.svelte"
 import ClearForm from "./ClearForm.svelte"
 import CloseScreenModal from "./CloseScreenModal.svelte"
 import ChangeFormStep from "./ChangeFormStep.svelte"
+import UpdateStateStep from "./UpdateState.svelte"
 
 // Defines which actions are available to configure in the front end.
 // Unfortunately the "name" property is used as the identifier so please don't
@@ -57,4 +58,8 @@ export default [
     name: "Change Form Step",
     component: ChangeFormStep,
   },
+  {
+    name: "Update State",
+    component: UpdateStateStep,
+  },
 ]

packages/client/src/components/ClientApp.svelte

@@ -22,6 +22,7 @@
   import ErrorSVG from "../../../builder/assets/error.svg"
   import UserBindingsProvider from "./UserBindingsProvider.svelte"
   import DeviceBindingsProvider from "./DeviceBindingsProvider.svelte"
+  import StateBindingsProvider from "./StateBindingsProvider.svelte"
 
   // Provide contexts
   setContext("sdk", SDK)
@@ -85,6 +86,7 @@
     {:else if $screenStore.activeLayout}
       <UserBindingsProvider>
         <DeviceBindingsProvider>
+          <StateBindingsProvider>
             <div id="app-root" class:preview={$builderStore.inBuilder}>
               {#key $screenStore.activeLayout._id}
                 <Component instance={$screenStore.activeLayout.props} />
@@ -107,6 +109,7 @@
               <SelectionIndicator />
               <HoverIndicator />
             {/if}
+          </StateBindingsProvider>
         </DeviceBindingsProvider>
       </UserBindingsProvider>
     {/if}

packages/client/src/components/StateBindingsProvider.svelte

@@ -0,0 +1,8 @@
+<script>
+  import Provider from "./Provider.svelte"
+  import { stateStore } from "../store"
+</script>
+
+<Provider key="state" data={$stateStore}>
+  <slot />
+</Provider>

packages/client/src/store/index.js

@@ -7,6 +7,7 @@ export { builderStore } from "./builder"
 export { dataSourceStore } from "./dataSource"
 export { confirmationStore } from "./confirmation"
 export { peekStore } from "./peek"
+export { stateStore } from "./state"
 
 // Context stores are layered and duplicated, so it is not a singleton
 export { createContextStore } from "./context"

packages/client/src/store/state.js

@@ -0,0 +1,25 @@
+import { writable } from "svelte/store"
+
+const createStateStore = () => {
+  const store = writable({})
+
+  const setValue = (key, value) => {
+    store.update(state => {
+      state[key] = value
+      return state
+    })
+  }
+  const deleteValue = key => {
+    store.update(state => {
+      delete state[key]
+      return state
+    })
+  }
+
+  return {
+    subscribe: store.subscribe,
+    actions: { setValue, deleteValue },
+  }
+}
+
+export const stateStore = createStateStore()

packages/client/src/utils/buttonActions.js

@@ -5,6 +5,7 @@ import {
   confirmationStore,
   authStore,
   peekStore,
+  stateStore,
 } from "../store"
 import { saveRow, deleteRow, executeQuery, triggerAutomation } from "../api"
 import { ActionTypes } from "../constants"
@@ -122,6 +123,15 @@ const closeScreenModalHandler = () => {
   window.dispatchEvent(new Event("close-screen-modal"))
 }
 
+const updateStateHandler = action => {
+  const { type, key, value } = action.parameters
+  if (type === "set") {
+    stateStore.actions.setValue(key, value)
+  } else if (type === "delete") {
+    stateStore.actions.deleteValue(key)
+  }
+}
+
 const handlerMap = {
   ["Save Row"]: saveRowHandler,
   ["Delete Row"]: deleteRowHandler,
@@ -134,6 +144,7 @@ const handlerMap = {
   ["Clear Form"]: clearFormHandler,
   ["Close Screen Modal"]: closeScreenModalHandler,
   ["Change Form Step"]: changeFormStepHandler,
+  ["Update State"]: updateStateHandler,
 }
 
 const confirmTextMap = {