Automatically refresh data when related data changes

packages/client/src/api/rows.js

@@ -1,4 +1,4 @@
-import { notificationStore } from "../store/notification"
+import { notificationStore, datasourceStore } from "../store"
 import API from "./api"
 import { fetchTableDefinition } from "./tables"
 
@@ -6,6 +6,9 @@ import { fetchTableDefinition } from "./tables"
  * Fetches data about a certain row in a table.
  */
 export const fetchRow = async ({ tableId, rowId }) => {
+  if (!tableId || !rowId) {
+    return
+  }
   const row = await API.get({
     url: `/api/${tableId}/rows/${rowId}`,
   })
@@ -16,6 +19,9 @@ export const fetchRow = async ({ tableId, rowId }) => {
  * Creates a row in a table.
  */
 export const saveRow = async row => {
+  if (!row?.tableId) {
+    return
+  }
   const res = await API.post({
     url: `/api/${row.tableId}/rows`,
     body: row,
@@ -23,6 +29,10 @@ export const saveRow = async row => {
   res.error
     ? notificationStore.danger("An error has occurred")
     : notificationStore.success("Row saved")
+
+  // Refresh related datasources
+  datasourceStore.actions.invalidateDatasource(row.tableId)
+
   return res
 }
 
@@ -30,6 +40,9 @@ export const saveRow = async row => {
  * Updates a row in a table.
  */
 export const updateRow = async row => {
+  if (!row?.tableId || !row?._id) {
+    return
+  }
   const res = await API.patch({
     url: `/api/${row.tableId}/rows/${row._id}`,
     body: row,
@@ -37,6 +50,10 @@ export const updateRow = async row => {
   res.error
     ? notificationStore.danger("An error has occurred")
     : notificationStore.success("Row updated")
+
+  // Refresh related datasources
+  datasourceStore.actions.invalidateDatasource(row.tableId)
+
   return res
 }
 
@@ -44,12 +61,19 @@ export const updateRow = async row => {
  * Deletes a row from a table.
  */
 export const deleteRow = async ({ tableId, rowId, revId }) => {
+  if (!tableId || !rowId || !revId) {
+    return
+  }
   const res = await API.del({
     url: `/api/${tableId}/rows/${rowId}/${revId}`,
   })
   res.error
     ? notificationStore.danger("An error has occurred")
     : notificationStore.success("Row deleted")
+
+  // Refresh related datasources
+  datasourceStore.actions.invalidateDatasource(tableId)
+
   return res
 }
 
@@ -57,6 +81,9 @@ export const deleteRow = async ({ tableId, rowId, revId }) => {
  * Deletes many rows from a table.
  */
 export const deleteRows = async ({ tableId, rows }) => {
+  if (!tableId || !rows) {
+    return
+  }
   const res = await API.post({
     url: `/api/${tableId}/rows`,
     body: {
@@ -67,6 +94,10 @@ export const deleteRows = async ({ tableId, rows }) => {
   res.error
     ? notificationStore.danger("An error has occurred")
     : notificationStore.success(`${rows.length} row(s) deleted`)
+
+  // Refresh related datasources
+  datasourceStore.actions.invalidateDatasource(tableId)
+
   return res
 }
 

packages/client/src/components/Provider.svelte

@@ -1,6 +1,8 @@
 <script>
-  import { getContext, setContext } from "svelte"
-  import { createContextStore } from "../store"
+  import { getContext, setContext, onMount } from "svelte"
+  import { datasourceStore, createContextStore } from "../store"
+  import { ActionTypes } from "../constants"
+  import { generate } from "shortid"
 
   export let data
   export let actions
@@ -13,15 +15,40 @@
   setContext("context", newContext)
   $: providerKey = key || $component.id
 
+  // Instance ID is unique to each instance of a provider
+  let instanceId
+
   // Add data context
   $: data !== undefined && newContext.actions.provideData(providerKey, data)
 
   // Add actions context
   $: {
-    actions?.forEach(({ type, callback }) => {
+    if (instanceId) {
+      actions?.forEach(({ type, callback, metadata }) => {
         newContext.actions.provideAction(providerKey, type, callback)
+
+        // Register any "refresh datasource" actions with a singleton store
+        // so we can easily refresh data at all levels for any datasource
+        if (type === ActionTypes.RefreshDatasource) {
+          const { datasource } = metadata || {}
+          datasourceStore.actions.registerDatasource(
+            datasource,
+            instanceId,
+            callback
+          )
+        }
       })
     }
+  }
+
+  onMount(() => {
+    // Generate a permanent unique ID for this component and use it to register
+    // any datasource actions
+    instanceId = generate()
+
+    // Unregister all datasource instances when unmounting this provider
+    return () => datasourceStore.actions.unregisterInstance(instanceId)
+  })
 </script>
 
 <slot />

packages/client/src/store/context.js

@@ -4,28 +4,28 @@ export const createContextStore = existingContext => {
   const store = writable({ ...existingContext })
 
   // Adds a data context layer to the tree
-  const provideData = (key, data) => {
-    if (!key) {
+  const provideData = (providerId, data) => {
+    if (!providerId) {
       return
     }
     store.update(state => {
-      state[key] = data
+      state[providerId] = data
 
       // Keep track of the closest component ID so we can later hydrate a "data" prop.
       // This is only required for legacy bindings that used "data" rather than a
       // component ID.
-      state.closestComponentId = key
+      state.closestComponentId = providerId
       return state
     })
   }
 
   // Adds an action context layer to the tree
-  const provideAction = (key, actionType, callback) => {
-    if (!key || !actionType) {
+  const provideAction = (providerId, actionType, callback) => {
+    if (!providerId || !actionType) {
       return
     }
     store.update(state => {
-      state[`${key}_${actionType}`] = callback
+      state[`${providerId}_${actionType}`] = callback
       return state
     })
   }

packages/client/src/store/datasource.js

@@ -0,0 +1,80 @@
+import { writable, get } from "svelte/store"
+
+export const createDatasourceStore = () => {
+  const store = writable([])
+
+  // Registers a new datasource instance
+  const registerDatasource = (datasource, instanceId, refresh) => {
+    if (!datasource || !instanceId || !refresh) {
+      return
+    }
+
+    // Create a list of all relevant datasource IDs which would require that
+    // this datasource is refreshed
+    let datasourceIds = []
+
+    // Extract table ID
+    if (datasource.type === "table") {
+      if (datasource.tableId) {
+        datasourceIds.push(datasource.tableId)
+      }
+    }
+
+    // Extract both table IDs from both sides of the relationship
+    else if (datasource.type === "link") {
+      if (datasource.rowTableId) {
+        datasourceIds.push(datasource.rowTableId)
+      }
+      if (datasource.tableId) {
+        datasourceIds.push(datasource.tableId)
+      }
+    }
+
+    // Extract the datasource ID (not the query ID) for queries
+    else if (datasource.type === "query") {
+      if (datasource.datasourceId) {
+        datasourceIds.push(datasource.datasourceId)
+      }
+    }
+
+    // Store configs for each relevant datasource ID
+    if (datasourceIds.length) {
+      store.update(state => {
+        datasourceIds.forEach(id => {
+          state.push({
+            datasourceId: id,
+            instanceId,
+            refresh,
+          })
+        })
+        return state
+      })
+    }
+  }
+
+  // Removes all registered datasource instances belonging to a particular
+  // instance ID
+  const unregisterInstance = instanceId => {
+    store.update(state => {
+      return state.filter(instance => instance.instanceId !== instanceId)
+    })
+  }
+
+  // Invalidates a specific datasource ID by refreshing all instances
+  // which depend on data from that datasource
+  const invalidateDatasource = datasourceId => {
+    const relatedInstances = get(store).filter(instance => {
+      return instance.datasourceId === datasourceId
+    })
+    relatedInstances?.forEach(instance => {
+      instance.refresh()
+    })
+  }
+
+  return {
+    subscribe: store.subscribe,
+    actions: { registerDatasource, unregisterInstance, invalidateDatasource },
+  }
+}
+
+export const datasourceStore = createDatasourceStore()

packages/client/src/store/index.js

@@ -3,6 +3,7 @@ export { notificationStore } from "./notification"
 export { routeStore } from "./routes"
 export { screenStore } from "./screens"
 export { builderStore } from "./builder"
+export { datasourceStore } from "./datasource"
 
 // Context stores are layered and duplicated, so it is not a singleton
 export { createContextStore } from "./context"

packages/standard-components/src/List.svelte

@@ -2,17 +2,23 @@
   import { getContext } from "svelte"
   import { isEmpty } from "lodash/fp"
 
+  export let datasource = []
+
   const { API, styleable, Provider, builderStore, ActionTypes } = getContext(
     "sdk"
   )
   const component = getContext("component")
-
-  export let datasource = []
-
   let rows = []
   let loaded = false
 
   $: fetchData(datasource)
+  $: actions = [
+    {
+      type: ActionTypes.RefreshDatasource,
+      callback: () => fetchData(datasource),
+      metadata: { datasource },
+    },
+  ]
 
   async function fetchData(datasource) {
     if (!isEmpty(datasource)) {
@@ -20,13 +26,6 @@
     }
     loaded = true
   }
-
-  $: actions = [
-    {
-      type: ActionTypes.RefreshDatasource,
-      callback: () => fetchData(datasource),
-    },
-  ]
 </script>
 
 <Provider {actions}>