zpt/js/app/attributes/TAL/talRepeat.js

Zenon Page Templates - JS (ZPT-JS)

/*
    TALRepeat class
*/
"use strict";

var expressionsUtils = require( '../../expressions/expressionsUtils.js' );
var expressionBuilder = require( '../../expressions/expressionBuilder.js' );
var Loop = require( '../../parsers/loop.js' );

var TALRepeat = function( stringToApply, varNameToApply, expressionStringToApply ) {
    
    var string = stringToApply;
    var varName = varNameToApply;
    var expressionString = expressionStringToApply;
    var expression = expressionBuilder.build( expressionString );
    var loop;
    
    var process = function( scope ){
        loop = new Loop( varName, expressionString, scope );
        return loop;
    };
    
    var dependsOn = function( scope ){
        return expressionsUtils.buildDependsOnList( undefined, scope, expression );
    };
    
    var update = function( parserUpdater, node ){
        parserUpdater.updateNode( node );
    };
    
    var toString = function(){
        return "TALRepeat: " + string;
    };
    
    var getExpressionString = function(){
        return expressionString;
    };
    
    var getVarName = function(){
        return varName;
    };
    
    return {
        process: process,
        dependsOn: dependsOn,
        update: update,
        toString: toString,
        type: TALRepeat.id,
        getExpressionString: getExpressionString,
        getVarName: getVarName
    };
};

TALRepeat.id = 'tal:repeat';

TALRepeat.build = function( string ) {
    
    var expressionString = string.trim();
    var space = expressionString.indexOf( ' ' );
    if ( space === -1 ) {
        throw 'Bad repeat expression: ' + expressionString;
    }
    var varName = expressionString.substring( 0, space );
    var loopExpression = expressionString.substring( space + 1 );
    
    return new TALRepeat( string, varName, loopExpression );
};

module.exports = TALRepeat;