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import request = require("dojo/request");
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import m = require("module");
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import { TraceSource } from "../log/TraceSource";
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import { TemplateCompiler } from "./TemplateCompiler";
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import { TemplateParser } from "./TemplateParser";
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import { isNullOrEmptyString } from "../safe";
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import { MapOf } from "../interfaces";
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type TemplateFn = (obj: object) => string;
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const trace = TraceSource.get(m.id);
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function compile(str: string) {
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if (isNullOrEmptyString(str))
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return () => "";
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const parser = new TemplateParser(str);
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const compiler = new TemplateCompiler();
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return compiler.compile(parser);
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}
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const cache: MapOf<TemplateFn> = {};
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interface OnLoadFn<T> {
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(res: T): void;
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error(e: any): void;
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}
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compile.load = (id: string, require: Require, callback: OnLoadFn<TemplateFn>) => {
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const url = require.toUrl(id);
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if (url in cache) {
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trace.debug("{0} -> {1}: cached", id, url);
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callback(cache[url]);
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} else {
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trace.debug("{0} -> {1}: load", id, url);
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request<string>(url).then(compile).then((tc: TemplateFn) => {
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trace.debug("{0}: compiled", url);
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callback(cache[url] = tc);
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}, (err: any) => {
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if (callback.error)
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callback.error({
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inner: err,
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from: "@implab/core/text/template-compile"
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});
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else
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trace.error({
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message: `Failed to load: ${url}`,
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error: err,
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from: "@implab/core/text/template-compile"
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});
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});
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}
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};
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export = compile;
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