overleaf/services/filestore/app/js/KeyBuilder.js

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const settings = require('@overleaf/settings')
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module.exports = {
getConvertedFolderKey,
addCachingToKey,
userFileKeyMiddleware,
userProjectKeyMiddleware,
bucketFileKeyMiddleware,
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templateFileKeyMiddleware,
}
function getConvertedFolderKey(key) {
return `${key}-converted-cache/`
}
function addCachingToKey(key, opts) {
key = this.getConvertedFolderKey(key)
if (opts.format && !opts.style) {
key = `${key}format-${opts.format}`
}
if (opts.style && !opts.format) {
key = `${key}style-${opts.style}`
}
if (opts.style && opts.format) {
key = `${key}format-${opts.format}-style-${opts.style}`
}
return key
}
function userFileKeyMiddleware(req, res, next) {
const { project_id: projectId, file_id: fileId } = req.params
req.key = `${projectId}/${fileId}`
req.bucket = settings.filestore.stores.user_files
next()
}
function userProjectKeyMiddleware(req, res, next) {
const { project_id: projectId } = req.params
req.project_id = projectId
req.key = `${projectId}/`
req.bucket = settings.filestore.stores.user_files
next()
}
function bucketFileKeyMiddleware(req, res, next) {
req.bucket = req.params.bucket
req.key = req.params[0]
next()
}
function templateFileKeyMiddleware(req, res, next) {
const {
template_id: templateId,
format,
version,
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sub_type: subType,
} = req.params
req.key = `${templateId}/v/${version}/${format}`
if (subType) {
req.key = `${req.key}/${subType}`
}
req.bucket = settings.filestore.stores.template_files
req.version = version
next()
}