Added chmod perm, modal to change, api with local/ftp/sftp (#399)

Read a fill current permissions for local driver

Finished permissions for ftp driver, read and change

Read permissions for sftp adapter

Created FilegatorFtp for a cleaner permissions integration

Implemented recursive chmod options for files/folders

Modified tests to cover permissions

Lint frontend permissions component

frontend/views/Browser.vue

@@ -135,6 +135,9 @@
                 <b-dropdown-item v-if="can(['write', 'zip']) && ! isArchive(props.row)" aria-role="listitem" @click="zip($event, props.row)">
                   <b-icon icon="file-archive" size="is-small" /> {{ lang('Zip') }}
                 </b-dropdown-item>
+                <b-dropdown-item v-if="can(['write', 'chmod']) && props.row.permissions !== -1" aria-role="listitem" @click="chmod($event, props.row)">
+                  <b-icon icon="lock" size="is-small" /> {{ lang('Permissions') }} ({{ props.row.permissions }})
+                </b-dropdown-item>
                 <b-dropdown-item v-if="can('write')" aria-role="listitem" @click="remove($event, props.row)">
                   <b-icon icon="trash-alt" size="is-small" /> {{ lang('Delete') }}
                 </b-dropdown-item>
@@ -164,6 +167,7 @@
 import Vue from 'vue'
 import Menu from './partials/Menu'
 import Tree from './partials/Tree'
+import Permissions from './partials/Permissions'
 import Editor from './partials/Editor'
 import Gallery from './partials/Gallery'
 import Search from './partials/Search'
@@ -491,6 +495,37 @@ export default {
         }
       })
     },
+    chmod(event, item) {
+      this.$modal.open({
+        parent: this,
+        hasModalCard: true,
+        component: Permissions,
+        props: {
+          name: item.name,
+          permissions: item.permissions,
+          isDir: item.type == 'dir',
+        },
+        events: {
+          saved: (permissions, recursive = null) => {
+            this.isLoading = true
+            api.chmodItems({
+              items: item ? [item] : this.getSelected(),
+              permissions: permissions,
+              recursive: recursive,
+            })
+              .then(() => {
+                this.isLoading = false
+                this.loadFiles()
+              })
+              .catch(error => {
+                this.isLoading = false
+                this.handleError(error)
+              })
+            this.checked = []
+          }
+        },
+      })
+    },
     rename(event, item) {
       this.$dialog.prompt({
         message: this.lang('New name'),