import definition = require("ui/builder/template-builder");

var KNOWNTEMPLATES = "knownTemplates";

export class TemplateBuilder {

private _items: Array<string>;

private _templateProperty: definition.TemplateProperty;

constructor(templateProperty: definition.TemplateProperty) {

this._items = new Array<string>();

this._templateProperty = templateProperty;

}

public get elementName(): string {

return this._templateProperty.elementName;

}

public addStartElement(elementName: string, attributes: Object) {

this._items.push("<" + elementName + (attributes ? " " + getAttributesAsString(attributes) + ">" : ">"));

}

public addEndElement(elementName: string) {

this._items.push("</" + elementName + ">");

}

public build() {

if (this._templateProperty.name in this._templateProperty.parent.component) {

this._templateProperty.parent.component[this._templateProperty.name] = this._items.join("");

}

}

}

export function isKnownTemplate(name: string, exports: any): boolean {

return KNOWNTEMPLATES in exports && exports[KNOWNTEMPLATES] && name in exports[KNOWNTEMPLATES];

}

function getAttributesAsString(attributes: Object): string {

var result = [];

for (var item in attributes) {

result.push(item + '="' + attributes[item] + '"');

}

return result.join(" ");

}