FilteredSearchTokenKeys for Epics

ee/app/assets/javascripts/filtered_search/filtered_search_token_keys_epics.js

+const tokenKeys = [{
+  key: 'author',
+  type: 'string',
+  param: 'username',
+  symbol: '@',
+  icon: 'pencil',
+  tag: '@author',
+}];
+
+const alternativeTokenKeys = [{
+  key: 'label',
+  type: 'string',
+  param: 'name',
+  symbol: '~',
+}];
+
+const tokenKeysWithAlternative = tokenKeys.concat(alternativeTokenKeys);
+
+const conditions = [{
+  url: 'label_name[]=No+Label',
+  tokenKey: 'label',
+  value: 'none',
+}];
+
+export default class FilteredSearchTokenKeysEpics {
+  static get() {
+    return tokenKeys;
+  }
+
+  static getKeys() {
+    return tokenKeys.map(i => i.key);
+  }
+
+  static getAlternatives() {
+    return alternativeTokenKeys;
+  }
+
+  static getConditions() {
+    return conditions;
+  }
+
+  static searchByKey(key) {
+    return tokenKeys.find(tokenKey => tokenKey.key === key) || null;
+  }
+
+  static searchBySymbol(symbol) {
+    return tokenKeys.find(tokenKey => tokenKey.symbol === symbol) || null;
+  }
+
+  static searchByKeyParam(keyParam) {
+    return tokenKeysWithAlternative.find((tokenKey) => {
+      let tokenKeyParam = tokenKey.key;
+
+      // Replace hyphen with underscore to compare keyParam with tokenKeyParam
+      // e.g. 'my-reaction' => 'my_reaction'
+      tokenKeyParam = tokenKeyParam.replace('-', '_');
+
+      if (tokenKey.param) {
+        tokenKeyParam += `_${tokenKey.param}`;
+      }
+
+      return keyParam === tokenKeyParam;
+    }) || null;
+  }
+
+  static searchByConditionUrl(url) {
+    return conditions.find(condition => condition.url === url) || null;
+  }
+
+  static searchByConditionKeyValue(key, value) {
+    return conditions
+      .find(condition => condition.tokenKey === key && condition.value === value) || null;
+  }
+}