feat: Provide an helper composable to count elements in a collection #…

…945

core/client/composables/counter.js

@@ -0,0 +1,51 @@
+import _ from 'lodash'
+import logger from 'loglevel'
+import { ref, watchEffect, onBeforeMount, onBeforeUnmount } from 'vue'
+import { api } from '../api.js'
+
+export function useCounter (options) {
+  logger.trace(`[KDK] Counter created with options ${options}`)
+
+  // Data
+  const counter = ref(0)
+
+  // Watch
+  watchEffect(() => refresh())
+
+  // Functions
+  function getService () {
+    const service = api.getService(options.service.value, options.contextId ? options.contextId.value : null)
+    if (!service) {
+      throw new Error('[KDK] Cannot retrieve target service ' + options.service.value)
+    }
+    return service
+  }
+  function getBaseQuery () {
+    return options.baseQuery ? options.baseQuery.value : {}
+  }
+  function getFilterQuery () {
+    return options.filterQuery ? options.filterQuery.value : {}
+  }
+  async function refresh () {
+    const query = _.merge(getBaseQuery(), getFilterQuery(), { $limit: 0 })
+    logger.trace(`[KDK] Count service ${options.service.value} with query ${query}`)
+    const response = await getService().find({ query })
+    counter.value = response.total
+  }
+
+  // Hooks
+  onBeforeMount(async () => {
+    const service = getService()
+    service.on('created', refresh)
+    service.on('removed', refresh)
+  })
+  onBeforeUnmount(() => {
+    const service = getService()
+    service.off('created', refresh)
+     service.off('removed', refresh)
+  })
+
+  return {
+    counter
+  }
+}

core/client/composables/index.js

@@ -1,5 +1,6 @@
 export * from './activity.js'
 export * from './collection.js'
+export * from './counter.js'
 export * from './layout.js'
 export * from './messages.js'
 export * from './pwa.js'

core/client/index.js

@@ -55,7 +55,7 @@ export default async function initialize () {
 
   logger.debug('[KDK] initializing core module')
 
-  // Declare the module intiaization states
+  // Declare the module initialization states
   Store.set('kdk', { core: { initialized: false }, map: { initialized: false } })
 
   // Initialize singletons that might be used globally first