GUAC-1138: Add filter pattern tokenizer. Match any object property against all tokens.

guacamole/src/main/webapp/app/list/types/FilterPattern.js

@@ -23,8 +23,14 @@
 /**
  * A service for defining the FilterPattern class.
  */
-angular.module('list').factory('FilterPattern', ['$parse',
-    function defineFilterPattern($parse) {
+angular.module('list').factory('FilterPattern', ['$injector',
+    function defineFilterPattern($injector) {
+
+    // Required types
+    var FilterToken = $injector.get('FilterToken');
+
+    // Required services
+    var $parse = $injector.get('$parse');
 
     /**
      * Object which handles compilation of filtering predicates as used by
@@ -69,6 +75,43 @@ angular.module('list').factory('FilterPattern', ['$parse',
             getters.push($parse(expression));
         });
 
+        /**
+         * Determines whether the given object matches the given filter pattern
+         * token.
+         *
+         * @param {Object} object
+         *     The object to match the token against.
+         * 
+         * @param {FilterToken} token
+         *     The token from the tokenized filter pattern to match aginst the
+         *     given object.
+         *
+         * @returns {Boolean}
+         *     true if the object matches the token, false otherwise.
+         */
+        var matchesToken = function matchToken(object, token) {
+
+            // Only match against literals
+            if (token.type !== 'LITERAL')
+                return false;
+
+            // For each defined getter
+            for (var i=0; i < getters.length; i++) {
+
+                // Retrieve value of current getter
+                var value = getters[i](object);
+
+                // If the value matches the pattern, the whole object matches
+                if (String(value).toLowerCase().indexOf(token.value) !== -1) 
+                    return true;
+
+            }
+
+            // No matches found
+            return false;
+
+        };
+
         /**
          * The current filtering predicate.
          *
@@ -92,26 +135,20 @@ angular.module('list').factory('FilterPattern', ['$parse',
                 return;
             }
                 
-            // Convert to lower case for case insensitive matching            
-            pattern = pattern.toLowerCase();
+            // Tokenize pattern, converting to lower case for case-insensitive matching
+            var tokens = FilterToken.tokenize(pattern.toLowerCase());
 
             // Return predicate which matches against the value of any getter in the getters array
-            filterPattern.predicate = function matchAny(object) {
-
-                // For each defined getter
-                for (var i=0; i < getters.length; i++) {
-
-                    // Retrieve value of current getter
-                    var value = getters[i](object);
-
-                    // If the value matches the pattern, the whole object matches
-                    if (String(value).toLowerCase().indexOf(pattern) !== -1) 
-                        return true;
+            filterPattern.predicate = function matchesAllTokens(object) {
 
+                // False if any token does not match
+                for (var i=0; i < tokens.length; i++) {
+                    if (!matchesToken(object, tokens[i]))
+                        return false;
                 }
 
-                // No matches found
-                return false;
+                // True if all tokens matched
+                return true;
 
             };
             

guacamole/src/main/webapp/app/list/types/FilterToken.js

@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2015 Glyptodon LLC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/**
+ * A service for defining the FilterToken class.
+ */
+angular.module('list').factory('FilterToken', [
+    function defineFilterToken() {
+
+    /**
+     * An arbitrary token having an associated type and string value.
+     *
+     * @constructor
+     * @param {String} type
+     *     The type of this token. Each legal type name is a property within
+     *     FilterToken.Types.
+     *
+     * @param {String} value
+     *     The string value of this token.
+     */
+    var FilterToken = function FilterToken(type, value) {
+
+        /**
+         * The type of this token. Each legal type name is a property within
+         * FilterToken.Types.
+         *
+         * @type String
+         */
+        this.type = type;
+
+        /**
+         * The string value of this token.
+         *
+         * @type String
+         */
+        this.value = value;
+
+    };
+
+    /**
+     * All legal token types, and corresponding regular expressions which match
+     * them. If the regular expression contains capturing groups, the last
+     * matching group will be used as the value of the token.
+     *
+     * @type Object.<String, RegExp>
+     */
+    FilterToken.Types = {
+
+        /**
+         * A string literal.
+         */
+        LITERAL: /^"([^"]*)"|^\S+/,
+
+        /**
+         * Arbitrary contiguous whitespace.
+         */
+        WHITESPACE: /^\s+/
+
+    };
+
+    /**
+     * Tokenizes the given string, returning an array of tokens. Whitespace
+     * tokens are dropped.
+     *
+     * @param {String} str
+     *     The string to tokenize.
+     *
+     * @returns {FilterToken[]}
+     *     All tokens identified within the given string, in order.
+     */
+    FilterToken.tokenize = function tokenize(str) {
+
+        var tokens = [];
+
+        /**
+         * Returns the first token on the current string, removing the token
+         * from that string.
+         *
+         * @returns FilterToken
+         *     The first token on the string, or null if no tokens match.
+         */
+        var popToken = function popToken() {
+
+            // Attempt to find a matching token
+            for (var type in FilterToken.Types) {
+
+                // Get regular expression for current type
+                var regex = FilterToken.Types[type];
+
+                // If token matches, return the matching group
+                var match = regex.exec(str);
+                if (match) {
+
+                    // Advance to next token
+                    str = str.substring(match[0].length);
+
+                    // Grab last matching group
+                    var matchingGroup = match[0];
+                    for (var i=1; i < match.length; i++)
+                        matchingGroup = match[i] || matchingGroup;
+
+                    // Return new token
+                    return new FilterToken(type, matchingGroup);
+
+                }
+
+            }
+
+            // No match
+            return null;
+
+        };
+
+        // Tokenize input until no input remains
+        while (str) {
+
+            // Remove first token
+            var token = popToken();
+            if (!token)
+                break;
+
+            // Add token to tokens array, if not whitespace
+            if (token.type !== 'WHITESPACE')
+                tokens.push(token);
+
+        }
+
+        return tokens;
+
+    };
+
+    return FilterToken;
+
+}]);