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| const Scope = require('./src/scope')
const _ = require('./src/util/underscore.js')
const assert = require('./src/util/assert.js')
const tokenizer = require('./src/tokenizer.js')
const statFileAsync = require('./src/util/fs.js').statFileAsync
const readFileAsync = require('./src/util/fs.js').readFileAsync
const path = require('path')
const Render = require('./src/render.js')
const lexical = require('./src/lexical.js')
const Tag = require('./src/tag.js')
const Filter = require('./src/filter.js')
const Parser = require('./src/parser')
const Syntax = require('./src/syntax.js')
const tags = require('./tags')
const filters = require('./filters')
const Promise = require('any-promise')
const anySeries = require('./src/util/promise.js').anySeries
const Errors = require('./src/util/error.js')
var _engine = {
init: function (tag, filter, options) {
if (options.cache) {
this.cache = {}
}
this.options = options
this.tag = tag
this.filter = filter
this.parser = Parser(tag, filter)
this.renderer = Render()
tags(this)
filters(this)
return this
},
parse: function (html, filepath) {
var tokens = tokenizer.parse(html, filepath, this.options)
return this.parser.parse(tokens)
},
render: function (tpl, ctx, opts) {
opts = _.assign({}, this.options, opts)
var scope = Scope.factory(ctx, opts)
return this.renderer.renderTemplates(tpl, scope)
},
parseAndRender: function (html, ctx, opts) {
return Promise.resolve()
.then(() => this.parse(html))
.then(tpl => this.render(tpl, ctx, opts))
},
renderFile: function (filepath, ctx, opts) {
opts = _.assign({}, opts)
return this.getTemplate(filepath, opts.root)
.then(templates => this.render(templates, ctx, opts))
},
evalOutput: function (str, scope) {
var tpl = this.parser.parseOutput(str.trim())
return this.renderer.evalOutput(tpl, scope)
},
registerFilter: function (name, filter) {
return this.filter.register(name, filter)
},
registerTag: function (name, tag) {
return this.tag.register(name, tag)
},
lookup: function (filepath, root) {
root = this.options.root.concat(root || [])
root = _.uniq(root)
var paths = root.map(root => path.resolve(root, filepath))
return anySeries(paths, path => statFileAsync(path).then(() => path))
.catch((e) => {
e.message = `${e.code}: Failed to lookup ${filepath} in: ${root}`
throw e
})
},
getTemplate: function (filepath, root) {
if (!path.extname(filepath)) {
filepath += this.options.extname
}
return this
.lookup(filepath, root)
.then(filepath => {
if (this.options.cache) {
var tpl = this.cache[filepath]
if (tpl) {
return Promise.resolve(tpl)
}
return readFileAsync(filepath)
.then(str => this.parse(str))
.then(tpl => (this.cache[filepath] = tpl))
} else {
return readFileAsync(filepath).then(str => this.parse(str, filepath))
}
})
},
express: function (opts) {
opts = opts || {}
var self = this
return function (filePath, ctx, callback) {
assert(Array.isArray(this.root) || _.isString(this.root),
'illegal views root, are you using express.js?')
opts.root = this.root
self.renderFile(filePath, ctx, opts)
.then(html => callback(null, html))
.catch(e => callback(e))
}
}
}
function factory (options) {
options = _.assign({
root: ['.'],
cache: false,
extname: '.liquid',
trim_right: false,
trim_left: false,
strict_filters: false,
strict_variables: false
}, options)
options.root = normalizeStringArray(options.root)
var engine = Object.create(_engine)
engine.init(Tag(), Filter(options), options)
return engine
}
function normalizeStringArray (value) {
if (Array.isArray(value)) return value
if (_.isString(value)) return [value]
return []
}
factory.lexical = lexical
factory.isTruthy = Syntax.isTruthy
factory.isFalsy = Syntax.isFalsy
factory.evalExp = Syntax.evalExp
factory.evalValue = Syntax.evalValue
factory.Types = {
ParseError: Errors.ParseError,
TokenizationEroor: Errors.TokenizationError,
RenderBreakError: Errors.RenderBreakError,
AssertionError: Errors.AssertionError
}
module.exports = factory
|