Function writeGraph

lib/handlers/patch.mjs:200–234

(graph, resource, root, serverUri)

// Writes the RDF graph to the given resource
function writeGraph (graph, resource, root, serverUri) {
  debug('PATCH -- Writing patched file')
  return new Promise((resolve, reject) => {
    const resourceSym = graph.sym(resource.url)

    function doWrite (serialized) {
      // First check if we are above quota
      overQuota(root, serverUri).then((isOverQuota) => {
        if (isOverQuota) {
          return reject(error(413,
            'User has exceeded their storage quota'))
        }

        fs.writeFile(resource.path, serialized, { encoding: 'utf8' }, function (err) {
          if (err) {
            return reject(error(500, `Failed to write file after patch: ${err}`))
          }
          debug('PATCH -- applied successfully')
          resolve('Patch applied successfully.\n')
        })
      }).catch(() => reject(error(500, 'Error finding user quota')))
    }

    if (resource.contentType === 'application/ld+json') {
      $rdf.serialize(resourceSym, graph, resource.url, resource.contentType, function (err, result) {
        if (err) return reject(error(500, `Failed to serialize after patch: ${err}`))
        doWrite(result)
      })
    } else {
      const serialized = $rdf.serialize(resourceSym, graph, resource.url, resource.contentType)
      debug(`PATCH -- Serialized graph:\n${serialized}`)
      doWrite(serialized)
    }
  })
}

// Creates a hash of the given text
function hash (text) {