mirror of https://github.com/jkjoy/sunpeiwen.git
64 lines
2.2 KiB
JavaScript
64 lines
2.2 KiB
JavaScript
var path = require('path')
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var utils = require('../utils')
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/**
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* Loads templates from a provided object mapping.
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* @alias swig.loaders.memory
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* @example
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* var templates = {
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* "layout": "{% block content %}{% endblock %}",
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* "home.html": "{% extends 'layout.html' %}{% block content %}...{% endblock %}"
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* };
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* swig.setDefaults({ loader: swig.loaders.memory(templates) });
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*
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* @param {object} mapping Hash object with template paths as keys and template sources as values.
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* @param {string} [basepath] Path to the templates as string. Assigning this value allows you to use semi-absolute paths to templates instead of relative paths.
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*/
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module.exports = function (mapping, basepath) {
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var ret = {}
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basepath = basepath ? path.resolve(basepath) : null
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/**
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* Resolves <var>to</var> to an absolute path or unique identifier. This is used for building correct, normalized, and absolute paths to a given template.
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* @alias resolve
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* @param {string} to Non-absolute identifier or pathname to a file.
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* @param {string} [from] If given, should attempt to find the <var>to</var> path in relation to this given, known path.
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* @return {string}
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*/
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ret.resolve = function (to, from) {
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if (basepath) {
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from = basepath
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} else {
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from = from ? path.dirname(from) : '/'
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}
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return path.resolve(from, to)
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}
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/**
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* Loads a single template. Given a unique <var>identifier</var> found by the <var>resolve</var> method this should return the given template.
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* @alias load
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* @param {string} identifier Unique identifier of a template (possibly an absolute path).
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* @param {function} [cb] Asynchronous callback function. If not provided, this method should run synchronously.
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* @return {string} Template source string.
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*/
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ret.load = function (pathname, cb) {
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var src, paths
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paths = [pathname, pathname.replace(/^(\/|\\)/, '')]
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src = mapping[paths[0]] || mapping[paths[1]]
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if (!src) {
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utils.throwError('Unable to find template "' + pathname + '".')
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}
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if (cb) {
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cb(null, src)
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return
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}
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return src
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}
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return ret
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}
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