Convert search-status-bar to preact

src/sidebar/components/search-status-bar.js

 'use strict';
 
-const memoize = require('../util/memoize');
+const { Fragment, createElement } = require('preact');
+const propTypes = require('prop-types');
+const { useMemo } = require('preact/hooks');
 
+const { withServices } = require('../util/service-context');
 const uiConstants = require('../ui-constants');
+const useStore = require('../store/use-store');
 
-// @ngInject
-function SearchStatusBarController(store, rootThread) {
-  this.TAB_ANNOTATIONS = uiConstants.TAB_ANNOTATIONS;
-  this.TAB_NOTES = uiConstants.TAB_NOTES;
-  this.TAB_ORPHANS = uiConstants.TAB_ORPHANS;
+const countVisibleAnns = annThread => {
+  return annThread.children.reduce(
+    function(count, child) {
+      return count + countVisibleAnns(child);
+    },
+    annThread.visible ? 1 : 0
+  );
+};
 
-  const thread = () => {
-    return rootThread.thread(store.getState());
-  };
+/**
+ * A bar where the user can clear a selection or search and see whether
+ * any search results were found.
+ * */
+function SearchStatusBar({
+  selectedTab,
+  totalAnnotations,
+  totalNotes,
+  rootThread,
+}) {
+  const storeState = useStore(store => store.getState());
+  const clearSelection = useStore(store => store.clearSelection);
+  const filterQuery = storeState.filterQuery;
+  const filterActive = !!storeState.filterQuery;
+
+  const thread = rootThread.thread(storeState);
 
-  const visibleCount = memoize(thread => {
-    return thread.children.reduce(
-      function(count, child) {
-        return count + visibleCount(child);
-      },
-      thread.visible ? 1 : 0
-    );
-  });
-
-  this.filterMatchCount = function() {
-    return visibleCount(thread());
+  const visibleCount = useMemo(() => {
+    return countVisibleAnns(thread);
+  }, [thread]);
+
+  const filterResults = () => {
+    const resultsCount = visibleCount;
+    switch (resultsCount) {
+      case 0:
+        return 'No results for "' + filterQuery + '"';
+      case 1:
+        return '1 search result';
+      default:
+        return resultsCount + ' search results';
+    }
   };
 
-  this.areAllAnnotationsVisible = function() {
-    if (store.getState().directLinkedGroupFetchFailed) {
+  const areNotAllAnnotationsVisible = () => {
+    if (storeState.directLinkedGroupFetchFailed) {
       return true;
     }
-    const selection = store.getState().selectedAnnotationMap;
+    const selection = storeState.selectedAnnotationMap;
     if (!selection) {
       return false;
     }
     return Object.keys(selection).length > 0;
   };
 
-  this.filterQuery = function() {
-    return store.getState().filterQuery;
-  };
-
-  this.filterActive = function() {
-    return !!store.getState().filterQuery;
-  };
-
-  this.onClearSelection = function() {
-    store.clearSelection();
-  };
+  return (
+    <div>
+      {filterActive && (
+        <div className="search-status-bar">
+          <button
+            className="primary-action-btn primary-action-btn--short"
+            onClick={clearSelection}
+            title="Clear the search filter and show all annotations"
+          >
+            <i className="primary-action-btn__icon h-icon-close" />
+            Clear search
+          </button>
+          <span>{filterResults()}</span>
+        </div>
+      )}
+      {!filterActive && areNotAllAnnotationsVisible() && (
+        <div className="search-status-bar">
+          <button
+            className="primary-action-btn primary-action-btn--short"
+            onClick={clearSelection}
+            title="Clear the selection and show all annotations"
+          >
+            {selectedTab === uiConstants.TAB_ORPHANS && (
+              <Fragment>Show all annotations and notes</Fragment>
+            )}
+            {selectedTab === uiConstants.TAB_ANNOTATIONS && (
+              <Fragment>
+                Show all annotations
+                {totalAnnotations > 1 && <span> ({totalAnnotations})</span>}
+              </Fragment>
+            )}
+            {selectedTab === uiConstants.TAB_NOTES && (
+              <Fragment>
+                Show all notes
+                {totalNotes > 1 && <span> ({totalNotes})</span>}
+              </Fragment>
+            )}
+          </button>
+        </div>
+      )}
+    </div>
+  );
 }
 
-module.exports = {
-  controller: SearchStatusBarController,
-  controllerAs: 'vm',
-  bindings: {
-    selectedTab: '<',
-    totalAnnotations: '<',
-    totalNotes: '<',
-  },
-  template: require('../templates/search-status-bar.html'),
+SearchStatusBar.propTypes = {
+  selectedTab: propTypes.oneOf([
+    uiConstants.TAB_ANNOTATIONS,
+    uiConstants.TAB_ORPHANS,
+    uiConstants.TAB_NOTES,
+  ]).isRequired,
+  totalAnnotations: propTypes.number.isRequired,
+  totalNotes: propTypes.number.isRequired,
+  rootThread: propTypes.object.isRequired,
 };
+
+SearchStatusBar.injectedProps = ['rootThread'];
+
+module.exports = withServices(SearchStatusBar);

src/sidebar/index.js

@@ -181,7 +181,10 @@ function startAngularApp(config) {
       wrapReactComponent(require('./components/moderation-banner'))
     )
     .component('newNoteBtn', require('./components/new-note-btn'))
-    .component('searchStatusBar', require('./components/search-status-bar'))
+    .component(
+      'searchStatusBar',
+      wrapReactComponent(require('./components/search-status-bar'))
+    )
     .component('selectionTabs', require('./components/selection-tabs'))
     .component('sidebarContent', require('./components/sidebar-content'))
     .component(

src/sidebar/templates/search-status-bar.html

-<div class="search-status-bar" ng-if="vm.filterActive()">
-  <button class="primary-action-btn primary-action-btn--short"
-          ng-click="vm.onClearSelection()"
-          title="Clear the search filter and show all annotations"
-  >
-    <i class="primary-action-btn__icon h-icon-close"></i> Clear search
-  </button>
-  <span ng-pluralize
-           count="vm.filterMatchCount()"
-           when="{'0': 'No results for “{{vm.filterQuery()}}”',
-                  'one': '1 search result',
-                  'other': '{} search results'}"></span>
-</div>
-<div class="search-status-bar" ng-if="!vm.filterActive() && vm.areAllAnnotationsVisible()">
-  <button class="primary-action-btn primary-action-btn--short"
-          ng-click="vm.onClearSelection()"
-          title="Clear the selection and show all annotations">
-    <span ng-if="!vm.selectedTab || vm.selectedTab === vm.TAB_ORPHANS">
-      Show all annotations and notes
-    </span>
-    <span ng-if="vm.selectedTab === vm.TAB_ANNOTATIONS">
-      Show all annotations
-      <span ng-if="vm.totalAnnotations > 1">
-        ({{vm.totalAnnotations}})
-      </span>
-    </span>
-    <span ng-if="vm.selectedTab === vm.TAB_NOTES">
-      Show all notes
-      <span ng-if="vm.totalNotes > 1">
-        ({{vm.totalNotes}})
-      </span>
-    </span>
-  </button>
-
-</div>

src/sidebar/templates/sidebar-content.html

@@ -9,7 +9,8 @@
 </selection-tabs>
 
 <search-status-bar
-  ng-show="!vm.isLoading()"
+  class="search-status-bar"
+  ng-if="!vm.isLoading()"
   selected-tab="vm.selectedTab"
   total-annotations="vm.totalAnnotations"
   total-notes="vm.totalNotes">