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server/utils/filePerms.js

@@ -0,0 +1,85 @@
+const fs = require('fs-extra')
+const Path = require('path')
+const Logger = require('../Logger')
+
+// Modified from:
+// https://github.com/isaacs/chmodr/blob/master/chmodr.js
+
+// If a party has r, add x
+// so that dirs are listable
+const dirMode = mode => {
+  if (mode & 0o400)
+    mode |= 0o100
+  if (mode & 0o40)
+    mode |= 0o10
+  if (mode & 0o4)
+    mode |= 0o1
+  return mode
+}
+
+const chmodrKid = (p, child, mode, uid, gid, cb) => {
+  if (typeof child === 'string')
+    return fs.lstat(Path.resolve(p, child), (er, stats) => {
+      if (er)
+        return cb(er)
+      stats.name = child
+      chmodrKid(p, stats, mode, uid, gid, cb)
+    })
+
+  if (child.isDirectory()) {
+    chmodr(Path.resolve(p, child.name), mode, uid, gid, er => {
+      if (er)
+        return cb(er)
+
+      var _path = Path.resolve(p, child.name)
+      fs.chmod(_path, dirMode(mode)).then(() => {
+        fs.chown(_path, uid, gid, cb)
+      })
+    })
+  } else {
+    var _path = Path.resolve(p, child.name)
+    fs.chmod(_path, mode).then(() => {
+      fs.chown(_path, uid, gid, cb)
+    })
+  }
+}
+
+
+const chmodr = (p, mode, uid, gid, cb) => {
+  fs.readdir(p, { withFileTypes: true }, (er, children) => {
+    // any error other than ENOTDIR means it's not readable, or
+    // doesn't exist.  give up.
+    if (er && er.code !== 'ENOTDIR') return cb(er)
+    if (er) {
+      return fs.chmod(p, mode).then(() => {
+        fs.chown(p, uid, gid, cb)
+      })
+    }
+    if (!children.length) {
+      return fs.chmod(p, dirMode(mode)).then(() => {
+        fs.chown(p, uid, gid, cb)
+      })
+    }
+
+    let len = children.length
+    let errState = null
+    const then = er => {
+      if (errState) return
+      if (er) return cb(errState = er)
+      if (--len === 0) {
+        return fs.chmod(p, dirMode(mode)).then(() => {
+          fs.chown(p, uid, gid, cb)
+        })
+      }
+    }
+
+    children.forEach(child => chmodrKid(p, child, mode, uid, gid, then))
+  })
+}
+
+module.exports = (p, mode, uid, gid) => {
+  return new Promise((resolve) => {
+    Logger.debug(`[FilePerms] Setting permission "${mode}" for uid ${uid} and gid ${gid} | "${p}"`)
+    chmodr(p, mode, uid, gid, resolve)
+  })
+}