alasql/src/63createvertex.js

AlaSQL.js - JavaScript SQL database library for relational and graph data manipulation with support of localStorage, IndexedDB, and Excel

/*
//
// CREATE VERTEX for AlaSQL
// Date: 21.04.2015
// (c) 2015, Andrey Gershun
//
*/

yy.CreateVertex = function (params) { return yy.extend(this, params); }
yy.CreateVertex.prototype.toString = function() {
	var s = K('CREATE')+' '+K('VERTEX')+' ';
	if(this.class) s += L(this.class)+' ';
	if(this.sharp) s += '#'+L(this.sharp)+' ';
	if(this.sets) {
		s += this.sets.toString();
	} else if(this.content) {
		s += this.content.toString();
	} else if(this.select) {
		s += this.select.toString();
	}

	return s;
}

yy.CreateVertex.prototype.toJavaScript = function(context, tableid, defcols) {
//		console.log('yy.CreateVertex.toJavaScript');
	var s = 'this.queriesfn['+(this.queriesidx-1)+'](this.params,null,'+context+')';
	// var s = '';
	return s;
};

// CREATE TABLE
/*
yy.CreateVertex.prototype.execute = function (databaseid,params,cb) {
	var res = 0;
	if(this.sets) {
		// var obj = {};
		// if(this.sets.length > 0) {
		// 	this.sets.forEach(function(st){
		// 		console.log(st);
		// 	});
		// }

	} else if(this.content) {

	} else if(this.select) {

	} else {
		// CREATE VERTEX without parameters
		var db = alasql.databases[databaseid];
		var vertex = {$id: db.counter++, $node:'vertex'};
		db.objects[vertex.$id] = vertex;
		res = vertex;
	}

	if(cb) res = cb(res);
	return res;
};
*/
yy.CreateVertex.prototype.compile = function (databaseid) {
	var dbid = databaseid;

	// CREATE VERTEX #id
	var sharp = this.sharp; 

	// CREATE VERTEX "Name"
	if(typeof this.name != 'undefined') {
		var s = 'x.name='+this.name.toJavaScript();
		var namefn = new Function('x',s);
	};

	if(this.sets && this.sets.length > 0) {
		var s = this.sets.map(function(st){
			return 'x[\''+st.column.columnid+'\']='+st.expression.toJavaScript('x','');
		}).join(';');
		var setfn = new Function('x,params,alasql',s);
	} else if(this.content) {

	} else if(this.select) {

	} else {
	}


	var statement = function(params,cb){
		var res;

		// CREATE VERTEX without parameters
		var db = alasql.databases[dbid];
		if(typeof sharp != 'undefined') {
			var id = sharp;
		} else {
			var id = db.counter++;
		}
		var vertex = {$id: id, $node:'VERTEX'};
		db.objects[vertex.$id] = vertex;
		res = vertex;
		if(namefn) namefn(vertex);
		if(setfn) setfn(vertex,params,alasql);

		if(cb) res = cb(res);
		return res;
	};
	return statement;
};

/*
	console.log('yy.CreateVertex.compile');

	if(this.sets) {
		var s = 'var a={};';
		if(this.sets.length > 0) {
			this.sets.forEach(function(st){
				console.log(st);
			});
		}

	} else if(this.content) {

	} else if(this.select) {

	}

};

*/

yy.CreateEdge = function (params) { return yy.extend(this, params); }
yy.CreateEdge.prototype.toString = function() {
//	console.log('here!');
	var s = K('CREATE')+' '+K('EDGE')+' ';
	if(this.class) s += L(this.class)+' ';
	// SET
	// CONTENT
	// SELECT
	return s;
}

yy.CreateEdge.prototype.toJavaScript = function(context, tableid, defcols) {
	var s = 'this.queriesfn['+(this.queriesidx-1)+'](this.params,null,'+context+')';
	return s;
};

// CREATE TABLE
/*
yy.CreateEdge.prototype.execute = function (databaseid,params,cb) {
	var res = 1;
	if(cb) res = cb(res);
	return res;
};
*/
yy.CreateEdge.prototype.compile = function (databaseid) {
	var dbid = databaseid;
	var fromfn = new Function('params,alasql','return '+this.from.toJavaScript());
	var tofn = new Function('params,alasql','return '+this.to.toJavaScript());

	// CREATE VERTEX "Name"
	if(typeof this.name != 'undefined') {
		var s = 'x.name='+this.name.toJavaScript();
		var namefn = new Function('x',s);
	};

	if(this.sets && this.sets.length > 0) {
		var s = this.sets.map(function(st){
			return 'x[\''+st.column.columnid+'\']='+st.expression.toJavaScript('x','');
		}).join(';');
		var setfn = new Function('x,params,alasql',s);
	} else if(this.content) {

	} else if(this.select) {

	} else {
	}

	var statement = function(params,cb){
		var res = 0;
			// CREATE VERTEX without parameters
		var db = alasql.databases[dbid];
		var edge = {$id: db.counter++, $node:'EDGE'};
		var v1 = fromfn(params,alasql);
		var v2 = tofn(params,alasql);
		// Set link
		edge.$in = [v1.$id];
		edge.$out = [v2.$id];
		// Set sides
		if(typeof v1.$out == 'undefined') v1.$out = [];
		v1.$out.push(edge.$id);
		if(typeof v2.$in == 'undefined') v2.$in = [];
		v2.$in.push(edge.$id);
		// Save in objects
		db.objects[edge.$id] = edge;
		res = edge;
		if(namefn) namefn(edge);
		if(setfn) setfn(edge,params,alasql);

		if(cb) res = cb(res);
		return res;
	};
	return statement;

};



yy.CreateGraph = function (params) { return yy.extend(this, params); }
yy.CreateGraph.prototype.toString = function() {
	var s = K('CREATE')+' '+K('GRAPH')+' ';
	if(this.class) s += L(this.class)+' ';
	return s;
}

// yy.CreateEdge.prototype.toJavaScript = function(context, tableid, defcols) {
// 	var s = 'this.queriesfn['+(this.queriesidx-1)+'](this.params,null,'+context+')';
// 	return s;
// };

yy.CreateGraph.prototype.execute = function (databaseid,params,cb) {
	var res = [];
	if(this.from) {
		if(alasql.from[this.from.funcid]) {
			this.graph = alasql.from[this.from.funcid.toUpperCase()]
				(this.from.args[0].value);
			console.log(this.graph);
		}
	}

//	stop;
		this.graph.forEach(function(g){
			if(g.source) {
				// GREATE EDGE
				var e = {};
				if(typeof g.as != 'undefined') alasql.vars[g.as] = e;

				if(typeof g.prop != 'undefined') {
	//				e[g.prop] = e;
	//				v.$id = g.prop; // We do not create $id for edge automatically
					e.name = g.prop;				
				};
				if(typeof g.sharp != 'undefined') e.$id = g.sharp;
				if(typeof g.name != 'undefined') e.name = g.name;
				if(typeof g.class != 'undefined') e.$class = g.class;

				var db = alasql.databases[databaseid];
				if(typeof e.$id == 'undefined') {
					e.$id = db.counter++;
				}
				e.$node='EDGE';
				if(typeof g.json != 'undefined') {
					extend(e,(new Function('params,alasql','return '+
					g.json.toJavaScript()))(params,alasql));
				}

				var v1;
				if(g.source.vars) {
					var vo = alasql.vars[g.source.vars];
					if(typeof vo == 'object') v1 = vo;
					else v1 = db.objects[vo];
				} else {
					var av1 = g.source.sharp; 
					if(typeof av1 == 'undefined') av1 = g.source.prop; 
					v1 = alasql.databases[databaseid].objects[av1];
					if(typeof v1 == 'undefined' && alasql.options.autovertex 
						&& ((typeof g.source.prop != 'undefined') || (typeof g.source.name != 'undefined'))) {
						v1 = findVertex(g.source.prop || g.source.name);
						if(typeof v1 == 'undefined') {
							v1 = createVertex(g.source);
						}
					};

				}

				var v2;
				if(g.source.vars) {
					var vo = alasql.vars[g.target.vars];
					if(typeof vo == 'object') v2 = vo;
					else v2 = db.objects[vo];
				} else {
					var av2 = g.target.sharp; 
					if(typeof av2 == 'undefined') av2 = g.target.prop; 
					v2 = alasql.databases[databaseid].objects[av2];
					if(typeof v2 == 'undefined' && alasql.options.autovertex 
						&& ((typeof g.target.prop != 'undefined') || (typeof g.target.name != 'undefined'))) {
						v2 = findVertex(g.target.prop || g.target.name);
						if(typeof v2 == 'undefined') {
							v2 = createVertex(g.target);
						}
					};
				};

//console.log(v1,v2);
				// Set link
				e.$in = [v1.$id];
				e.$out = [v2.$id];
				// Set sides
				if(typeof v1.$out == 'undefined') v1.$out = [];
				v1.$out.push(e.$id);
				if(typeof v2.$in == 'undefined') v2.$in = [];
				v2.$in.push(e.$id);

				db.objects[e.$id] = e;
				if(typeof e.$class != 'undefined') {
					if(typeof alasql.databases[databaseid].tables[e.$class] == 'undefined') {
						throw new Error('No such class. Pleace use CREATE CLASS');
					} else {
						// TODO - add insert()
						alasql.databases[databaseid].tables[e.$class].data.push(e);
					}
				}

				res.push(e.$id);

			} else {
				createVertex(g);
			}
		});

	if(cb) res = cb(res);
	return res;

	// Find vertex by name
	function findVertex(name) {
		var objects = alasql.databases[alasql.useid].objects;
		for(var k in objects) {
			if(objects[k].name == name) {
				return objects[k];
			}
		}
		return undefined;
	}

	function createVertex(g) {
		// GREATE VERTEX
		var v = {};
		if(typeof g.as != 'undefined') alasql.vars[g.as] = v;
		if(typeof g.prop != 'undefined') {
	//				v[g.prop] = true;
			v.$id = g.prop;
			v.name = g.prop;				
		};
		if(typeof g.sharp != 'undefined') v.$id = g.sharp;
		if(typeof g.name != 'undefined') v.name = g.name;
		if(typeof g.class != 'undefined') v.$class = g.class;

		var db = alasql.databases[databaseid];
		if(typeof v.$id == 'undefined') {
			v.$id = db.counter++;
		}
		v.$node='VERTEX';
		if(typeof g.json != 'undefined') {
			extend(v,(new Function('params,alasql','return '+
			g.json.toJavaScript()))(params,alasql));
		}
		db.objects[v.$id] = v;
		if(typeof v.$class != 'undefined') {
			if(typeof alasql.databases[databaseid].tables[v.$class] == 'undefined') {
				throw new Error('No such class. Pleace use CREATE CLASS');
			} else {
				// TODO - add insert()
				alasql.databases[databaseid].tables[v.$class].data.push(v);
			}
		}

		res.push(v.$id);
		return v;
	}


};



yy.CreateGraph.prototype.compile1 = function (databaseid) {
	var dbid = databaseid;
	var fromfn = new Function('params,alasql','return '+this.from.toJavaScript());
	var tofn = new Function('params,alasql','return '+this.to.toJavaScript());

	// CREATE VERTEX "Name"
	if(typeof this.name != 'undefined') {
		var s = 'x.name='+this.name.toJavaScript();
		var namefn = new Function('x',s);
	};

	if(this.sets && this.sets.length > 0) {
		var s = this.sets.map(function(st){
			return 'x[\''+st.column.columnid+'\']='+st.expression.toJavaScript('x','');
		}).join(';');
		var setfn = new Function('x,params,alasql',s);
	} else if(this.content) {

	} else if(this.select) {

	} else {
	}

	var statement = function(params,cb){
		var res = 0;
			// CREATE VERTEX without parameters
		var db = alasql.databases[dbid];
		var edge = {$id: db.counter++, $node:'EDGE'};
		var v1 = fromfn(params,alasql);
		var v2 = tofn(params,alasql);
		// Set link
		edge.$in = [v1.$id];
		edge.$out = [v2.$id];
		// Set sides
		if(typeof v1.$out == 'undefined') v1.$out = [];
		v1.$out.push(edge.$id);
		if(typeof v2.$in == 'undefined') v2.$in = [];
		v2.$in.push(edge.$id);
		// Save in objects
		db.objects[edge.$id] = edge;
		res = edge;
		if(namefn) namefn(edge);
		if(setfn) setfn(edge,params,alasql);

		if(cb) res = cb(res);
		return res;
	};
	return statement;

};