mirror of https://gitee.com/bigwinds/arangodb
533 lines
14 KiB
JavaScript
533 lines
14 KiB
JavaScript
/*jslint indent: 2, nomen: true, maxlen: 100, white: true plusplus: true */
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/*global $, d3, _, console, document*/
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Graph functionality
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2010-2012 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Michael Hackstein
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/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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//function ArangoAdapter(arangodb, nodes, edges, nodeCollection, edgeCollection, width, height) {
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function ArangoAdapter(nodes, edges, config) {
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"use strict";
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if (nodes === undefined) {
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throw "The nodes have to be given.";
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}
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if (edges === undefined) {
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throw "The edges have to be given.";
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}
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if (config === undefined) {
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throw "A configuration with node- and edgeCollection has to be given.";
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}
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if (config.nodeCollection === undefined) {
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throw "The nodeCollection has to be given.";
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}
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if (config.edgeCollection === undefined) {
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throw "The edgeCollection has to be given.";
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}
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var self = this,
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initialX = {},
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initialY = {},
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api = {},
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queries = {},
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nodeCollection,
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edgeCollection,
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arangodb,
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width,
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height,
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setWidth = function(w) {
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initialX.range = w / 2;
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initialX.start = w / 4;
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initialX.getStart = function () {
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return this.start + Math.random() * this.range;
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};
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},
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setHeight = function(h) {
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initialY.range = h / 2;
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initialY.start = h / 4;
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initialY.getStart = function () {
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return this.start + Math.random() * this.range;
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};
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},
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parseConfig = function(config) {
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initialX.getStart = function() {return 0;};
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initialY.getStart = function() {return 0;};
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nodeCollection = config.nodeCollection;
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edgeCollection = config.edgeCollection;
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if (config.host === undefined) {
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arangodb = "http://" + document.location.host;
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} else {
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arangodb = config.host;
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}
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if (config.width !== undefined) {
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setWidth(config.width);
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}
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if (config.height !== undefined) {
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setHeight(config.height);
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}
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},
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findNode = function(id) {
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var res = $.grep(nodes, function(e){
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return e._id === id;
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});
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if (res.length === 0) {
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return false;
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}
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if (res.length === 1) {
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return res[0];
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}
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throw "Too many nodes with the same ID, should never happen";
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},
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findEdge = function(id) {
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var res = $.grep(edges, function(e){
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return e._id === id;
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});
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if (res.length === 0) {
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return false;
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}
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if (res.length === 1) {
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return res[0];
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}
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throw "Too many nodes with the same ID, should never happen";
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},
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insertNode = function(data) {
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var node = {
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_data: data,
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_id: data._id
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},
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n = findNode(node._id);
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if (n) {
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return n;
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}
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node.x = initialX.getStart();
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node.y = initialY.getStart();
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nodes.push(node);
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node._outboundCounter = 0;
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node._inboundCounter = 0;
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return node;
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},
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insertEdge = function(data) {
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var source,
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target,
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edge = {
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_data: data,
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_id: data._id
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},
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e = findEdge(edge._id);
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if (e) {
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return e;
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}
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source = findNode(data._from);
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target = findNode(data._to);
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if (!source) {
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throw "Unable to insert Edge, source node not existing " + edge._from;
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}
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if (!target) {
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throw "Unable to insert Edge, target node not existing " + edge._to;
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}
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edge.source = source;
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edge.target = target;
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edges.push(edge);
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source._outboundCounter++;
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target._inboundCounter++;
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return edge;
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},
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removeNode = function (node) {
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var i;
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for ( i = 0; i < nodes.length; i++ ) {
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if ( nodes[i] === node ) {
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nodes.splice( i, 1 );
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return;
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}
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}
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},
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removeEdge = function (edge) {
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var i;
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for ( i = 0; i < edges.length; i++ ) {
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if ( edges[i] === edge ) {
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edges.splice( i, 1 );
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return;
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}
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}
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},
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removeEdgesForNode = function (node) {
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var i;
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for ( i = 0; i < edges.length; i++ ) {
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if (edges[i].source === node) {
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node._outboundCounter--;
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edges[i].target._inboundCounter--;
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edges.splice( i, 1 );
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i--;
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} else if (edges[i].target === node) {
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node._inboundCounter--;
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edges[i].source._outboundCounter--;
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edges.splice( i, 1 );
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i--;
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}
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}
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},
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// Helper function to easily remove all outbound edges for one node
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removeOutboundEdgesFromNode = function ( node ) {
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if (node._outboundCounter > 0) {
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var removed = [],
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i;
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for ( i = 0; i < edges.length; i++ ) {
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if ( edges[i].source === node ) {
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removed.push(edges[i]);
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node._outboundCounter--;
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edges[i].target._inboundCounter--;
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edges.splice( i, 1 );
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if (node._outboundCounter === 0) {
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break;
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}
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i--;
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}
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}
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return removed;
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}
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},
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sendQuery = function(query, bindVars, onSuccess) {
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if (query !== queries.connectedEdges) {
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bindVars["@nodes"] = nodeCollection;
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}
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bindVars["@edges"] = edgeCollection;
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var data = {
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query: query,
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bindVars: bindVars
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};
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$.ajax({
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type: "POST",
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url: api.cursor,
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data: JSON.stringify(data),
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contentType: "application/json",
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dataType: "json",
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processData: false,
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success: function(data) {
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onSuccess(data.result);
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},
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error: function(data) {
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try {
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console.log(data.statusText);
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throw "[" + data.errorNum + "] " + data.errorMessage;
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}
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catch (e) {
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console.log(e);
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throw "Undefined ERROR";
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}
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}
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});
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},
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parseResultOfTraversal = function (result, callback) {
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result = result[0];
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_.each(result, function(visited) {
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var node = insertNode(visited.vertex),
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path = visited.path;
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_.each(path.vertices, function(connectedNode) {
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insertNode(connectedNode);
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});
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_.each(path.edges, function(edge) {
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insertEdge(edge);
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});
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});
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if (callback) {
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callback(result[0].vertex);
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}
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},
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parseResultOfQuery = function (result, callback) {
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_.each(result, function (node) {
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var n = findNode(node._id);
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if (!n) {
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insertNode(node);
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n = node;
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} else {
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n.children = node.children;
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}
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self.requestCentralityChildren(node._id, function(c) {
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n._centrality = c;
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});
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_.each(n.children, function(id) {
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var check = findNode(id),
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newnode;
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if (check) {
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insertEdge(n, check);
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self.requestCentralityChildren(id, function(c) {
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n._centrality = c;
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});
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} else {
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newnode = {_id: id};
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insertNode(newnode);
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insertEdge(n, newnode);
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self.requestCentralityChildren(id, function(c) {
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newnode._centrality = c;
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});
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}
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});
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if (callback) {
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callback(n);
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}
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});
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},
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permanentlyRemoveEdgesOfNode = function (nodeId) {
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sendQuery(queries.connectedEdges, {
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id: nodeId
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}, function(res) {
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_.each(res, self.deleteEdge);
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});
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};
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parseConfig(config);
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api.base = arangodb.lastIndexOf("http://", 0) === 0
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? arangodb + "/_api/"
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: "http://" + arangodb + "/_api/";
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api.cursor = api.base + "cursor";
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api.collection = api.base + "collection/";
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api.document = api.base + "document/";
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api.node = api.base + "document?collection=" + nodeCollection;
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api.edge = api.base + "edge?collection=" + edgeCollection;
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queries.nodeById = "FOR n IN @@nodes"
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+ " FILTER n._id == @id"
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+ " LET links = ("
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+ " FOR l IN @@edges"
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+ " FILTER n._id == l._from"
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+ " FOR t IN @@nodes"
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+ " FILTER t._id == l._to"
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+ " RETURN t._id"
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+ " )"
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+ " RETURN MERGE(n, {\"children\" : links})";
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queries.traversalById = "RETURN TRAVERSAL("
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+ "@@nodes, "
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+ "@@edges, "
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+ "@id, "
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+ "\"outbound\", {"
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+ "strategy: \"depthfirst\","
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+ "maxDepth: 1,"
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+ "paths: true"
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+ "})";
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queries.traversalByAttribute = function(attr) {
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return "FOR n IN @@nodes "
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+ " FILTER n." + attr
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+ " == @value"
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+ " RETURN TRAVERSAL("
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+ "@@nodes, "
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+ "@@edges, "
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+ "n._id, "
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+ "\"outbound\", {"
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+ "strategy: \"depthfirst\","
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+ "maxDepth: 1,"
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+ "paths: true"
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+ "})";
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};
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queries.childrenCentrality = "FOR u IN @@nodes"
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+ " FILTER u._id == @id"
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+ " LET g = ("
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+ " FOR l in @@edges"
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+ " FILTER l._from == u._id"
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+ " RETURN 1 )"
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+ " RETURN length(g)";
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queries.connectedEdges = "FOR e IN @@edges"
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+ " FILTER e._to == @id"
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+ " || e._from == @id"
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+ " RETURN e";
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self.oldLoadNodeFromTreeById = function(nodeId, callback) {
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sendQuery(queries.nodeById, {
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id: nodeId
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}, function(res) {
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parseResultOfQuery(res, callback);
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});
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};
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self.loadNodeFromTreeById = function(nodeId, callback) {
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sendQuery(queries.traversalById, {
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id: nodeId
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}, function(res) {
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parseResultOfTraversal(res, callback);
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});
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};
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self.loadNodeFromTreeByAttributeValue = function(attribute, value, callback) {
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sendQuery(queries.traversalByAttribute(attribute), {
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value: value
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}, function(res) {
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parseResultOfTraversal(res, callback);
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});
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};
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self.requestCentralityChildren = function(nodeId, callback) {
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sendQuery(queries.childrenCentrality,{
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id: nodeId
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}, function(res) {
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callback(res[0]);
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});
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};
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self.createEdge = function (edgeToAdd, callback) {
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$.ajax({
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cache: false,
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type: "POST",
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url: api.edge + "&from=" + edgeToAdd.source._id + "&to=" + edgeToAdd.target._id,
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data: JSON.stringify({}),
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dataType: "json",
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contentType: "application/json",
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processData: false,
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success: function(data) {
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data._from = edgeToAdd.source._id;
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data._to = edgeToAdd.target._id;
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delete data.error;
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var edge = insertEdge(data);
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callback(edge);
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},
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error: function(data) {
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throw data.statusText;
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}
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});
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};
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self.deleteEdge = function (edgeToRemove, callback) {
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$.ajax({
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cache: false,
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type: "DELETE",
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url: api.document + edgeToRemove._id,
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contentType: "application/json",
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dataType: "json",
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processData: false,
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success: function() {
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removeEdge(edgeToRemove);
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if (callback !== undefined && _.isFunction(callback)) {
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callback();
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}
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},
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error: function(data) {
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throw data.statusText;
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}
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});
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};
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self.patchEdge = function (edgeToPatch, patchData, callback) {
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$.ajax({
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cache: false,
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type: "PUT",
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url: api.document + edgeToPatch._id,
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data: JSON.stringify(patchData),
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dataType: "json",
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contentType: "application/json",
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processData: false,
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success: function(data) {
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edgeToPatch._data = $.extend(edgeToPatch._data, patchData);
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callback();
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},
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error: function(data) {
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throw data.statusText;
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}
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});
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};
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self.createNode = function (nodeToAdd, callback) {
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$.ajax({
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cache: false,
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type: "POST",
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url: api.node,
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data: JSON.stringify(nodeToAdd),
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dataType: "json",
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contentType: "application/json",
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processData: false,
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success: function(data) {
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insertNode(data);
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callback(data);
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},
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error: function(data) {
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throw data.statusText;
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}
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});
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};
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self.deleteNode = function (nodeToRemove, callback) {
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$.ajax({
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cache: false,
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type: "DELETE",
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url: api.document + nodeToRemove._id,
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dataType: "json",
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contentType: "application/json",
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processData: false,
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success: function() {
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removeEdgesForNode(nodeToRemove);
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permanentlyRemoveEdgesOfNode(nodeToRemove._id);
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removeNode(nodeToRemove);
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if (callback !== undefined && _.isFunction(callback)) {
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callback();
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}
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},
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error: function(data) {
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throw data.statusText;
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}
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});
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};
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self.patchNode = function (nodeToPatch, patchData, callback) {
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$.ajax({
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cache: false,
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type: "PUT",
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url: api.document + nodeToPatch._id,
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data: JSON.stringify(patchData),
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dataType: "json",
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contentType: "application/json",
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processData: false,
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success: function(data) {
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nodeToPatch._data = $.extend(nodeToPatch._data, patchData);
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callback(nodeToPatch);
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},
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error: function(data) {
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throw data.statusText;
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}
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});
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};
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self.changeTo = function (nodesCol, edgesCol ) {
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nodeCollection = nodesCol;
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edgeCollection = edgesCol;
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api.node = api.base + "document?collection=" + nodeCollection;
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api.edge = api.base + "edge?collection=" + edgeCollection;
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};
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} |