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|
const fs = require('graceful-fs')
const path = require('path')
const error = require('./formatted-error')
const prr = require('prr')
const url = require('url')
const mime = require('mime')
const hogan = require('hogan.js')
const xtend = require('xtend')
const debug = require('debug')
const slug = require('to-slug-case')
const humanize = require('string-humanize')
const crypto = require('crypto')
const rfc822 = require('rfc822-date')
const assert = require('assert')
const now = require('date-now')
module.exports = Page
/*
Attributes:
* name: relative name for finding later (default title)
* basedir: the source dir to esolve against for urls, names, etc
* filename: the original file path
* url: the url of the page
* title:
* date
* draft:
* meta: the extracted front-matter
* last-modified: last-modified obvs.
* etag: unique id for the entity for proper http caching
* content-type: the content-type of the page, can be defined in the meta
* outfile: the destination of the rendered page (determined by haiku)
* context:
* render: template function
*/
function Page(options) {
if (!(this instanceof Page)) return new Page(options)
assert.ok(options.filename, 'options.filename is required')
assert.ok(options.basedir, 'options.basedir is required')
var page = this
Object.defineProperties(page, {
url: { get: getURL },
slug: { get: getSlug },
title: { get: getTitle },
date: { get: getDate },
draft: { get: getDraft },
etag: {
get: getEtag
},
'content-type': {
get: getContentType
},
'last-modified': {
get: getLastModified
},
index: {
get: getIndex
}
}, { enumerable: true })
page.filename = options.filename
page.basedir = options.basedir
page.name = path.relative(page.basedir, page.filename)
page.baseurl = options.baseurl || '/'
page.mtime = options.mtime || now()
page.meta = options.meta || {}
page.body = options.body || ''
page.debug = debug('haiku:page - ' + page.name)
}
Page.prototype.is = function(string) {
var page = this
var _mime = mime.lookup(page.name)
var match = !!_mime.match(string)
return match
}
Page.prototype.wants = function(string) {
var page = this
var match = page['content-type'].match(string)
return match
}
Page.prototype.toJSON = function() {
var page = this
var json = xtend(page.meta, {
url: page.url,
name: page.name,
slug: page.slug,
draft: page.draft,
title: page.title,
'last-modified': page['last-modified'],
'content-type': page['content-type'],
body: page.body,
filename: page.filename,
basedir: page.basedir,
mtime: page.mtime
})
return json
}
function getSlug() {
var page = this
var extension = path.extname(page.url)
var basename = path.basename(page.url)
var cleaned = basename.replace(extension, '')
var dirname = path.dirname(page.name)
var _slug = slug(cleaned)
return path.join(dirname, _slug)
}
function getURL() {
var page = this
var _url = url.resolve('/', page.name)
var extension = path.extname(page.name)
var translated = extension
var debug = page.debug
if (page.wants('html')) {
_url = _url.replace(extension, '.html')
}
if (page.baseurl !== '/') {
_url = path.join(page.baseurl, _url)
}
return _url
}
function getTitle() {
var page = this
var title = path.basename(page.slug)
return page.meta.title || humanize(title)
}
function getDate() {
var page = this
return page.meta.date
}
function getDraft() {
var page = this
return !! page.meta.draft || false
}
function getContentType() {
var page = this
var override = page.meta['content-type']
if (page.is('markdown')) {
ct = mime.lookup('.html')
} else {
ct = mime.lookup(page.name)
}
if (override) ct = override
return ct
}
function getLastModified() {
var page = this
var mtime = new Date(page.mtime)
return rfc822(mtime)
}
function getIndex() {
var page = this
if (page.slug.match(/index$/)) {
return path.resolve(page.baseurl, page.slug.replace('index', ''))
}
}
function getEtag() {
var page = this
var debug = page.debug
debug('page.url: %s', page.url)
debug('page.mtime: %s', page.mtime.getTime())
debug('page.body', page.body)
return crypto
.createHash('md5')
.update(page.url)
.update(page.mtime.toString())
// TODO: change to rendered output
.update(page.body || '')
.digest('hex')
}
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