FEATURE: Filter by solved

app/controllers/knowledge_explorer/knowledge_explorer_controller.rb

@@ -8,6 +8,7 @@ module KnowledgeExplorer
       filters = {
         tags: params[:tags],
         category: params[:category],
+        solved: params[:solved],
         search_term: params[:search],
         ascending: params[:ascending],
         order: params[:order],

assets/javascripts/discourse/controllers/knowledge-explorer.js.es6

@@ -22,6 +22,7 @@ export default Ember.Controller.extend({
     ascending: "ascending",
     filterCategories: "category",
     filterTags: "tags",
+    filterSolved: "solved",
     orderColumn: "order",
     searchTerm: "search",
     selectedTopic: "topic"
@@ -35,6 +36,7 @@ export default Ember.Controller.extend({
   tags: Ember.computed.readOnly("model.tags"),
   filterTags: null,
   filterCategories: null,
+  filterSolved: false,
   searchTerm: null,
   selectedTopic: null,
   topic: null,
@@ -74,6 +76,11 @@ export default Ember.Controller.extend({
 
   emptySearchResults: Ember.computed.equal("searchCount", 0),
 
+  @discourseComputed
+  canFilterSolved() {
+    return this.siteSettings.solved_enabled;
+  },
+
   @discourseComputed("filterTags")
   filtered(filterTags) {
     return !!filterTags;
@@ -94,6 +101,11 @@ export default Ember.Controller.extend({
       });
     },
 
+    onChangeFilterSolved(solvedFilter) {
+      this.set("filterSolved", solvedFilter);
+      this.send("refreshModel");
+    },
+
     updateSelectedTags(tag) {
       let filter = this.filterTags;
       if (filter && filter.includes(tag.id)) {
@@ -192,6 +204,7 @@ export default Ember.Controller.extend({
       const params = this.getProperties(
         "filterCategories",
         "filterTags",
+        "filterSolved",
         "searchTerm",
         "ascending",
         "orderColumn"

assets/javascripts/discourse/models/knowledge-explorer.js.es6

@@ -11,6 +11,7 @@ export default {
     if (params.filterCategories)
       filters.push(`category=${params.filterCategories}`);
     if (params.filterTags) filters.push(`tags=${params.filterTags}`);
+    if (params.filterSolved) filters.push(`solved=${params.filterSolved}`);
     if (params.searchTerm) filters.push(`search=${params.searchTerm}`);
     if (params.ascending) filters.push("ascending=true");
     if (params.orderColumn) filters.push(`order=${params.orderColumn}`);

assets/javascripts/discourse/templates/knowledge-explorer.hbs

@@ -15,6 +15,19 @@
       {{/if}}
       <div class="knowledge-explorer-filters">
         {{#if expandedFilters}}
+            {{#if canFilterSolved}}
+              <div class="knowledge-explorer-items knowledge-explorer-solved">
+                <label class="checkbox-label knowledge-explorer-item">
+                  {{input
+                    type="checkbox"
+                    checked=(readonly filterSolved)
+                    change=(action "onChangeFilterSolved" value="target.checked")
+                  }}
+                  {{i18n "knowledge_explorer.filter_solved"}} 
+                </label>
+              </div>
+
+            {{/if}}
             {{#if categories}}
               <div class="knowledge-explorer-items knowledge-explorer-categories">
                 <h3>{{i18n 'knowledge_explorer.categories'}}</h3>

config/locales/client.en.yml

@@ -17,3 +17,4 @@ en:
         back: "Go back"
         navigate_to_topic: "View the discussion on this topic"
       filter_button: "Filters"
+      filter_solved: "Topic Solved?"

lib/knowledge_explorer/query.rb

@@ -45,6 +45,15 @@ module KnowledgeExplorer
         end
       end
 
+      if @filters[:solved].present?
+        results = results.where("topics.id IN (
+          SELECT tc.topic_id
+          FROM topic_custom_fields tc
+          WHERE tc.name = 'accepted_answer_post_id' AND
+                          tc.value IS NOT NULL
+        )")
+      end
+
       # filter results by search term
       if @filters[:search_term].present?
         term = Search.prepare_data(@filters[:search_term])
@@ -153,6 +162,7 @@ module KnowledgeExplorer
 
       filters.push("tags=#{@filters[:tags]}") if @filters[:tags].present?
       filters.push("category=#{@filters[:category]}") if @filters[:category].present?
+      filters.push("solved=#{@filters[:solved]}") if @filters[:solved].present?
       filters.push("search=#{@filters[:search_term]}") if @filters[:search_term].present?
       filters.push("sort=#{@filters[:sort]}") if @filters[:sort].present?