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wiki/server/models/assets.js

172 lines
4.5 KiB

/* global WIKI */
const Model = require('objection').Model
const moment = require('moment')
const path = require('path')
const fs = require('fs-extra')
const _ = require('lodash')
const assetHelper = require('../helpers/asset')
/**
* Users model
*/
module.exports = class Asset extends Model {
static get tableName() { return 'assets' }
static get jsonSchema () {
return {
type: 'object',
properties: {
id: {type: 'integer'},
filename: {type: 'string'},
hash: {type: 'string'},
ext: {type: 'string'},
kind: {type: 'string'},
mime: {type: 'string'},
fileSize: {type: 'integer'},
metadata: {type: 'object'},
createdAt: {type: 'string'},
updatedAt: {type: 'string'}
}
}
}
static get relationMappings() {
return {
author: {
relation: Model.BelongsToOneRelation,
modelClass: require('./users'),
join: {
from: 'assets.authorId',
to: 'users.id'
}
},
folder: {
relation: Model.BelongsToOneRelation,
modelClass: require('./assetFolders'),
join: {
from: 'assets.folderId',
to: 'assetFolders.id'
}
}
}
}
async $beforeUpdate(opt, context) {
await super.$beforeUpdate(opt, context)
this.updatedAt = moment.utc().toISOString()
}
async $beforeInsert(context) {
await super.$beforeInsert(context)
this.createdAt = moment.utc().toISOString()
this.updatedAt = moment.utc().toISOString()
}
async getAssetPath() {
let hierarchy = []
if (this.folderId) {
hierarchy = await WIKI.models.assetFolders.getHierarchy(this.folderId)
}
return (this.folderId) ? hierarchy.map(h => h.slug).join('/') + `/${this.filename}` : this.filename
}
async deleteAssetCache() {
await fs.remove(path.join(process.cwd(), `data/cache/${this.hash}.dat`))
}
static async upload(opts) {
const fileInfo = path.parse(opts.originalname)
const fileHash = assetHelper.generateHash(opts.assetPath)
// Check for existing asset
let asset = await WIKI.models.assets.query().where({
hash: fileHash,
folderId: opts.folderId
}).first()
// Build Object
let assetRow = {
filename: opts.originalname,
hash: fileHash,
ext: fileInfo.ext,
kind: _.startsWith(opts.mimetype, 'image/') ? 'image' : 'binary',
mime: opts.mimetype,
fileSize: opts.size,
folderId: opts.folderId,
authorId: opts.userId
}
// Save asset data
try {
const fileBuffer = await fs.readFile(opts.path)
if (asset) {
// Patch existing asset
await WIKI.models.assets.query().patch(assetRow).findById(asset.id)
await WIKI.models.knex('assetData').where({
id: asset.id
}).update({
data: fileBuffer
})
} else {
// Create asset entry
asset = await WIKI.models.assets.query().insert(assetRow)
await WIKI.models.knex('assetData').insert({
id: asset.id,
data: fileBuffer
})
}
} catch (err) {
WIKI.logger.warn(err)
}
// Move temp upload to cache
await fs.move(opts.path, path.join(process.cwd(), `data/cache/${fileHash}.dat`), { overwrite: true })
}
static async getAsset(assetPath, res) {
let assetExists = await WIKI.models.assets.getAssetFromCache(assetPath, res)
if (!assetExists) {
await WIKI.models.assets.getAssetFromDb(assetPath, res)
}
}
static async getAssetFromCache(assetPath, res) {
const fileHash = assetHelper.generateHash(assetPath)
const cachePath = path.join(process.cwd(), `data/cache/${fileHash}.dat`)
return new Promise((resolve, reject) => {
res.type(path.extname(assetPath))
res.sendFile(cachePath, { dotfiles: 'deny' }, err => {
if (err) {
resolve(false)
} else {
resolve(true)
}
})
})
}
static async getAssetFromDb(assetPath, res) {
const fileHash = assetHelper.generateHash(assetPath)
const cachePath = path.join(process.cwd(), `data/cache/${fileHash}.dat`)
const asset = await WIKI.models.assets.query().where('hash', fileHash).first()
if (asset) {
const assetData = await WIKI.models.knex('assetData').where('id', asset.id).first()
res.type(asset.ext)
res.send(assetData.data)
await fs.outputFile(cachePath, assetData.data)
} else {
res.sendStatus(404)
}
}
static async flushTempUploads() {
return fs.emptyDir(path.join(process.cwd(), `data/uploads`))
}
}