Method astCallExpression

src/backend/web-gl/function-node.js:1320–1492

* @desc Parses the abstract syntax tree for *call* expression * @param {Object} ast - the AST object to parse * @param {Array} retArr - return array string * @returns {Array} the append retArr

(ast, retArr)

   * @returns  {Array} the append retArr
   */
  astCallExpression(ast, retArr) {
    if (!ast.callee) {
      throw this.astErrorOutput('Unknown CallExpression', ast);
    }

    let functionName = null;
    const isMathFunction = this.isAstMathFunction(ast);

    // Its a math operator or this.something(), remove the prefix
    if (isMathFunction || (ast.callee.object && ast.callee.object.type === 'ThisExpression')) {
      functionName = ast.callee.property.name;
    }
    // Issue #212, BABEL!
    else if (ast.callee.type === 'SequenceExpression' && ast.callee.expressions[0].type === 'Literal' && !isNaN(ast.callee.expressions[0].raw)) {
      functionName = ast.callee.expressions[1].property.name;
    } else {
      functionName = ast.callee.name;
    }

    if (!functionName) {
      throw this.astErrorOutput(`Unhandled function, couldn't find name`, ast);
    }

    // if this if grows to more than one, lets use a switch
    switch (functionName) {
      case 'pow':
        functionName = '_pow';
        break;
      case 'round':
        functionName = '_round';
        break;
    }

    // Register the function into the called registry
    if (this.calledFunctions.indexOf(functionName) < 0) {
      this.calledFunctions.push(functionName);
    }

    if (functionName === 'random' && this.plugins && this.plugins.length > 0) {
      for (let i = 0; i < this.plugins.length; i++) {
        const plugin = this.plugins[i];
        if (plugin.functionMatch === 'Math.random()' && plugin.functionReplace) {
          retArr.push(plugin.functionReplace);
          return retArr;
        }
      }
    }

    // track the function was called
    if (this.onFunctionCall) {
      this.onFunctionCall(this.name, functionName, ast.arguments);
    }

    // Call the function
    retArr.push(functionName);

    // Open arguments space
    retArr.push('(');