wikijs-fork/libs/entries.js
2017-04-08 16:38:28 -04:00

410 lines
11 KiB
JavaScript

'use strict'
const Promise = require('bluebird')
const path = require('path')
const fs = Promise.promisifyAll(require('fs-extra'))
const _ = require('lodash')
const crypto = require('crypto')
/**
* Entries Model
*/
module.exports = {
_repoPath: 'repo',
_cachePath: 'data/cache',
/**
* Initialize Entries model
*
* @return {Object} Entries model instance
*/
init () {
let self = this
self._repoPath = path.resolve(ROOTPATH, appconfig.paths.repo)
self._cachePath = path.resolve(ROOTPATH, appconfig.paths.data, 'cache')
return self
},
/**
* Check if a document already exists
*
* @param {String} entryPath The entry path
* @return {Promise<Boolean>} True if exists, false otherwise
*/
exists (entryPath) {
let self = this
return self.fetchOriginal(entryPath, {
parseMarkdown: false,
parseMeta: false,
parseTree: false,
includeMarkdown: false,
includeParentInfo: false,
cache: false
}).then(() => {
return true
}).catch((err) => { // eslint-disable-line handle-callback-err
return false
})
},
/**
* Fetch a document from cache, otherwise the original
*
* @param {String} entryPath The entry path
* @return {Promise<Object>} Page Data
*/
fetch (entryPath) {
let self = this
let cpath = self.getCachePath(entryPath)
return fs.statAsync(cpath).then((st) => {
return st.isFile()
}).catch((err) => { // eslint-disable-line handle-callback-err
return false
}).then((isCache) => {
if (isCache) {
// Load from cache
return fs.readFileAsync(cpath).then((contents) => {
return JSON.parse(contents)
}).catch((err) => { // eslint-disable-line handle-callback-err
winston.error('Corrupted cache file. Deleting it...')
fs.unlinkSync(cpath)
return false
})
} else {
// Load original
return self.fetchOriginal(entryPath)
}
})
},
/**
* Fetches the original document entry
*
* @param {String} entryPath The entry path
* @param {Object} options The options
* @return {Promise<Object>} Page data
*/
fetchOriginal (entryPath, options) {
let self = this
let fpath = self.getFullPath(entryPath)
let cpath = self.getCachePath(entryPath)
options = _.defaults(options, {
parseMarkdown: true,
parseMeta: true,
parseTree: true,
includeMarkdown: false,
includeParentInfo: true,
cache: true
})
return fs.statAsync(fpath).then((st) => {
if (st.isFile()) {
return fs.readFileAsync(fpath, 'utf8').then((contents) => {
// Parse contents
let pageData = {
markdown: (options.includeMarkdown) ? contents : '',
html: (options.parseMarkdown) ? mark.parseContent(contents) : '',
meta: (options.parseMeta) ? mark.parseMeta(contents) : {},
tree: (options.parseTree) ? mark.parseTree(contents) : []
}
if (!pageData.meta.title) {
pageData.meta.title = _.startCase(entryPath)
}
pageData.meta.path = entryPath
// Get parent
let parentPromise = (options.includeParentInfo) ? self.getParentInfo(entryPath).then((parentData) => {
return (pageData.parent = parentData)
}).catch((err) => { // eslint-disable-line handle-callback-err
return (pageData.parent = false)
}) : Promise.resolve(true)
return parentPromise.then(() => {
// Cache to disk
if (options.cache) {
let cacheData = JSON.stringify(_.pick(pageData, ['html', 'meta', 'tree', 'parent']), false, false, false)
return fs.writeFileAsync(cpath, cacheData).catch((err) => {
winston.error('Unable to write to cache! Performance may be affected.')
winston.error(err)
return true
})
} else {
return true
}
}).return(pageData)
})
} else {
return false
}
}).catch((err) => { // eslint-disable-line handle-callback-err
throw new Promise.OperationalError('Entry ' + entryPath + ' does not exist!')
})
},
/**
* Parse raw url path and make it safe
*
* @param {String} urlPath The url path
* @return {String} Safe entry path
*/
parsePath (urlPath) {
let wlist = new RegExp('[^a-z0-9/-]', 'g')
urlPath = _.toLower(urlPath).replace(wlist, '')
if (urlPath === '/') {
urlPath = 'home'
}
let urlParts = _.filter(_.split(urlPath, '/'), (p) => { return !_.isEmpty(p) })
return _.join(urlParts, '/')
},
/**
* Gets the parent information.
*
* @param {String} entryPath The entry path
* @return {Promise<Object|False>} The parent information.
*/
getParentInfo (entryPath) {
let self = this
if (_.includes(entryPath, '/')) {
let parentParts = _.initial(_.split(entryPath, '/'))
let parentPath = _.join(parentParts, '/')
let parentFile = _.last(parentParts)
let fpath = self.getFullPath(parentPath)
return fs.statAsync(fpath).then((st) => {
if (st.isFile()) {
return fs.readFileAsync(fpath, 'utf8').then((contents) => {
let pageMeta = mark.parseMeta(contents)
return {
path: parentPath,
title: (pageMeta.title) ? pageMeta.title : _.startCase(parentFile),
subtitle: (pageMeta.subtitle) ? pageMeta.subtitle : false
}
})
} else {
return Promise.reject(new Error('Parent entry is not a valid file.'))
}
})
} else {
return Promise.reject(new Error('Parent entry is root.'))
}
},
/**
* Gets the full original path of a document.
*
* @param {String} entryPath The entry path
* @return {String} The full path.
*/
getFullPath (entryPath) {
return path.join(this._repoPath, entryPath + '.md')
},
/**
* Gets the full cache path of a document.
*
* @param {String} entryPath The entry path
* @return {String} The full cache path.
*/
getCachePath (entryPath) {
return path.join(this._cachePath, crypto.createHash('md5').update(entryPath).digest('hex') + '.json')
},
/**
* Gets the entry path from full path.
*
* @param {String} fullPath The full path
* @return {String} The entry path
*/
getEntryPathFromFullPath (fullPath) {
let absRepoPath = path.resolve(ROOTPATH, this._repoPath)
return _.chain(fullPath).replace(absRepoPath, '').replace('.md', '').replace(new RegExp('\\\\', 'g'), '/').value()
},
/**
* Update an existing document
*
* @param {String} entryPath The entry path
* @param {String} contents The markdown-formatted contents
* @return {Promise<Boolean>} True on success, false on failure
*/
update (entryPath, contents) {
let self = this
let fpath = self.getFullPath(entryPath)
return fs.statAsync(fpath).then((st) => {
if (st.isFile()) {
return self.makePersistent(entryPath, contents).then(() => {
return self.updateCache(entryPath).then(entry => {
return search.add(entry)
})
})
} else {
return Promise.reject(new Error('Entry does not exist!'))
}
}).catch((err) => {
winston.error(err)
return Promise.reject(new Error('Failed to save document.'))
})
},
/**
* Update local cache and search index
*
* @param {String} entryPath The entry path
* @return {Promise} Promise of the operation
*/
updateCache (entryPath) {
let self = this
return self.fetchOriginal(entryPath, {
parseMarkdown: true,
parseMeta: true,
parseTree: true,
includeMarkdown: true,
includeParentInfo: true,
cache: true
}).catch(err => {
winston.error(err)
return err
}).then((pageData) => {
return {
entryPath,
meta: pageData.meta,
parent: pageData.parent || {},
text: mark.removeMarkdown(pageData.markdown)
}
}).catch(err => {
winston.error(err)
return err
}).then((content) => {
return db.Entry.findOneAndUpdate({
_id: content.entryPath
}, {
_id: content.entryPath,
title: content.meta.title || content.entryPath,
subtitle: content.meta.subtitle || '',
parent: content.parent.title || '',
parentPath: content.parent.path || ''
}, {
new: true,
upsert: true
})
}).catch(err => {
winston.error(err)
return err
})
},
/**
* Create a new document
*
* @param {String} entryPath The entry path
* @param {String} contents The markdown-formatted contents
* @return {Promise<Boolean>} True on success, false on failure
*/
create (entryPath, contents) {
let self = this
return self.exists(entryPath).then((docExists) => {
if (!docExists) {
return self.makePersistent(entryPath, contents).then(() => {
return self.updateCache(entryPath).then(entry => {
return search.add(entry)
})
})
} else {
return Promise.reject(new Error('Entry already exists!'))
}
}).catch((err) => {
winston.error(err)
return Promise.reject(new Error('Something went wrong.'))
})
},
/**
* Makes a document persistent to disk and git repository
*
* @param {String} entryPath The entry path
* @param {String} contents The markdown-formatted contents
* @return {Promise<Boolean>} True on success, false on failure
*/
makePersistent (entryPath, contents) {
let self = this
let fpath = self.getFullPath(entryPath)
return fs.outputFileAsync(fpath, contents).then(() => {
return git.commitDocument(entryPath)
})
},
/**
* Move a document
*
* @param {String} entryPath The current entry path
* @param {String} newEntryPath The new entry path
* @return {Promise} Promise of the operation
*/
move (entryPath, newEntryPath) {
let self = this
if (_.isEmpty(entryPath) || entryPath === 'home') {
return Promise.reject(new Error('Invalid path!'))
}
return git.moveDocument(entryPath, newEntryPath).then(() => {
return git.commitDocument(newEntryPath).then(() => {
// Delete old cache version
let oldEntryCachePath = self.getCachePath(entryPath)
fs.unlinkAsync(oldEntryCachePath).catch((err) => { return true }) // eslint-disable-line handle-callback-err
// Delete old index entry
search.delete(entryPath)
// Create cache for new entry
return self.updateCache(newEntryPath).then(entry => {
return search.add(entry)
})
})
})
},
/**
* Generate a starter page content based on the entry path
*
* @param {String} entryPath The entry path
* @return {Promise<String>} Starter content
*/
getStarter (entryPath) {
let formattedTitle = _.startCase(_.last(_.split(entryPath, '/')))
return fs.readFileAsync(path.join(ROOTPATH, 'client/content/create.md'), 'utf8').then((contents) => {
return _.replace(contents, new RegExp('{TITLE}', 'g'), formattedTitle)
})
}
}