Add filter by last token

app/assets/javascripts/droplab/droplab_filter.js

@@ -10,13 +10,22 @@ droplab.plugin(function init(DropLab) {
     var matches = [];
     // will only work on dynamically set data 
     // and if a config text property is set
-    if(!data || !config.hasOwnProperty('text')){
+    if(!data || (!config.hasOwnProperty('text') && !config.hasOwnProperty('filter'))){
       return;
     }
-    matches = data.map(function(o){
+
+    var filterFunction = function(o){
       // cheap string search
       o.droplab_hidden = o[config.text].toLowerCase().indexOf(value) === -1;
       return o;
+    };
+
+    if (config.hasOwnProperty('filter') && config.filter !== undefined) {
+      filterFunction = config.filter;
+    }
+
+    matches = data.map(function(o) {
+      return filterFunction(o, value);
     });
     list.render(matches);
   }

app/assets/javascripts/filtered_search/dropdown_author.js.es6

@@ -19,6 +19,14 @@
       super.renderContent();
       droplab.setData(this.hookId, '/autocomplete/users.json?search=&per_page=20&active=true&project_id=2&group_id=&skip_ldap=&todo_filter=&todo_state_filter=&current_user=true&push_code_to_protected_branches=&author_id=&skip_users=');
     }
+
+    filterMethod(item, query) {
+      const { value } = gl.FilteredSearchTokenizer.getLastTokenObject(query);
+      const valueWithoutPrefix = value.slice(1);
+
+      item.droplab_hidden = item['username'].indexOf(valueWithoutPrefix) === -1;
+      return item;
+    }
   }
 
   global.DropdownAuthor = DropdownAuthor;

app/assets/javascripts/filtered_search/filtered_search_dropdown.js.es6

@@ -50,12 +50,17 @@
 
     getFilterConfig(filterKeyword) {
       const config = {};
-      const filterConfig = {
-        text: filterKeyword,
-      };
+      const filterConfig = {};
 
-      config[this.hookId] = filterKeyword ? filterConfig : {};
+      if (filterKeyword) {
+        filterConfig.text = filterKeyword;
+      }
+
+      if (this.filterMethod) {
+        filterConfig.filter = this.filterMethod;
+      }
 
+      config[this.hookId] = filterConfig;
       return config;
     }
 

app/assets/javascripts/filtered_search/filtered_search_tokenizer.es6

@@ -29,6 +29,55 @@
       }
     }
 
+    static getLastTokenObject(input) {
+      const token = FilteredSearchTokenizer.getLastToken(input);
+      const colonIndex = token.indexOf(':');
+
+      const key = colonIndex !== -1 ? token.slice(0, colonIndex) : '';
+      const value = colonIndex !== -1 ? token.slice(colonIndex) : token;
+
+      return {
+        key,
+        value,
+      }
+    }
+
+    static getLastToken(input) {
+      let completeToken = false;
+      let completeQuotation = true;
+      let lastQuotation = '';
+      let i = input.length;
+
+      const doubleQuote = '"';
+      const singleQuote = '\'';
+      while(!completeToken && i >= 0) {
+        const isDoubleQuote = input[i] === doubleQuote;
+        const isSingleQuote = input[i] === singleQuote;
+
+        // If the second quotation is found
+        if ((lastQuotation === doubleQuote && input[i] === doubleQuote) ||
+          (lastQuotation === singleQuote && input[i] === singleQuote)) {
+          completeQuotation = true;
+        }
+
+        // Save the first quotation
+        if ((input[i] === doubleQuote && lastQuotation === '') ||
+          (input[i] === singleQuote && lastQuotation === '')) {
+          lastQuotation = input[i];
+          completeQuotation = false;
+        }
+
+        if (completeQuotation && input[i] === ' ') {
+          completeToken = true;
+        } else {
+          i--;
+        }
+      }
+
+      // Adjust by 1 because of empty space
+      return input.slice(i + 1);
+    }
+
     static processTokens(input) {
       let tokens = [];
       let searchToken = '';