feat: I18n (#1653)

* feat: i18n

* Changing language single source of truth from TEAM to USER

* Changes according to @tommoor comments on PR

* Changed package.json for build:i18n and translation label

* Finished 1st MVP of i18n for outline

* new translation labels & Portuguese from Portugal translation

* Fixes from PR request

* Described language dropdown as an experimental feature

* Set keySeparator to false in order to cowork with html keys

* Added useTranslation to Breadcrumb

* Repositioned <strong> element

* Removed extra space from TemplatesMenu

* Fortified the test suite for i18n

* Fixed trans component problematic

* Check if selected language is available

* Update yarn.lock

* Removed unused Trans

* Removing debug variable from i18n init

* Removed debug variable

* test: update snapshots

* flow: Remove decorator usage to get proper flow typing
It's a shame, but hopefully we'll move to Typescript in the next 6 months and we can forget this whole Flow mistake ever happened

* translate: Drafts

* More translatable strings

* Mo translation strings

* translation: Search

* async translations loading

* cache translations in client

* Revert "cache translations in client"

This reverts commit 08fb61ce36384ff90a704faffe4761eccfb76da1.

* Revert localStorage cache for cache headers

* Update Crowdin configuration file

* Moved translation files to locales folder and fixed english text

* Added CONTRIBUTING File for CrowdIn

* chore: Move translations again to please CrowdIn

* fix: loading paths
chore: Add strings for editor

* fix: Improve validation on documents.import endpoint

* test: mock bull

* fix: Unknown mimetype should fallback to Markdown parsing if markdown extension (#1678)

* closes #1675

* Update CONTRIBUTING

* chore: Add link to translation portal from app UI

* refactor: Centralize language config

* fix: Ensure creation of i18n directory in build

* feat: Add language prompt

* chore: Improve contributing guidelines, add link from README

* chore: Normalize tab header casing

* chore: More string externalization

* fix: Language prompt in dark mode

Co-authored-by: André Glatzl <andreglatzl@gmail.com>

app/scenes/CollectionMembers/AddGroupsToCollection.js

@@ -3,12 +3,14 @@ import { debounce } from "lodash";
 import { observable } from "mobx";
 import { inject, observer } from "mobx-react";
 import * as React from "react";
+import { withTranslation, type TFunction } from "react-i18next";
 import styled from "styled-components";
 import AuthStore from "stores/AuthStore";
 import CollectionGroupMembershipsStore from "stores/CollectionGroupMembershipsStore";
 import GroupsStore from "stores/GroupsStore";
 import UiStore from "stores/UiStore";
 import Collection from "models/Collection";
+import Group from "models/Group";
 import GroupNew from "scenes/GroupNew";
 import Button from "components/Button";
 import Empty from "components/Empty";
@@ -26,6 +28,7 @@ type Props = {
   collectionGroupMemberships: CollectionGroupMembershipsStore,
   groups: GroupsStore,
   onSubmit: () => void,
+  t: TFunction,
 };
 
 @observer
@@ -52,50 +55,56 @@ class AddGroupsToCollection extends React.Component<Props> {
     });
   }, 250);
 
-  handleAddGroup = (group) => {
+  handleAddGroup = (group: Group) => {
+    const { t } = this.props;
+
     try {
       this.props.collectionGroupMemberships.create({
         collectionId: this.props.collection.id,
         groupId: group.id,
         permission: "read_write",
       });
-      this.props.ui.showToast(`${group.name} was added to the collection`);
+      this.props.ui.showToast(
+        t("{{ groupName }} was added to the collection", {
+          groupName: group.name,
+        })
+      );
     } catch (err) {
-      this.props.ui.showToast("Could not add user");
+      this.props.ui.showToast(t("Could not add user"));
       console.error(err);
     }
   };
 
   render() {
-    const { groups, collection, auth } = this.props;
+    const { groups, collection, auth, t } = this.props;
     const { user, team } = auth;
     if (!user || !team) return null;
 
     return (
       <Flex column>
         <HelpText>
-          Can’t find the group you’re looking for?{" "}
+          {t("Can’t find the group you’re looking for?")}{" "}
           <a role="button" onClick={this.handleNewGroupModalOpen}>
-            Create a group
+            {t("Create a group")}
           </a>
           .
         </HelpText>
 
         <Input
           type="search"
-          placeholder="Search by group name…"
+          placeholder={t("Search by group name…")}
           value={this.query}
           onChange={this.handleFilter}
-          label="Search groups"
+          label={t("Search groups")}
           labelHidden
           flex
         />
         <PaginatedList
           empty={
             this.query ? (
-              <Empty>No groups matching your search</Empty>
+              <Empty>{t("No groups matching your search")}</Empty>
             ) : (
-              <Empty>No groups left to add</Empty>
+              <Empty>{t("No groups left to add")}</Empty>
             )
           }
           items={groups.notInCollection(collection.id, this.query)}
@@ -108,7 +117,7 @@ class AddGroupsToCollection extends React.Component<Props> {
               renderActions={() => (
                 <ButtonWrap>
                   <Button onClick={() => this.handleAddGroup(item)} neutral>
-                    Add
+                    {t("Add")}
                   </Button>
                 </ButtonWrap>
               )}
@@ -116,7 +125,7 @@ class AddGroupsToCollection extends React.Component<Props> {
           )}
         />
         <Modal
-          title="Create a group"
+          title={t("Create a group")}
           onRequestClose={this.handleNewGroupModalClose}
           isOpen={this.newGroupModalOpen}
         >
@@ -131,9 +140,11 @@ const ButtonWrap = styled.div`
   margin-left: 6px;
 `;
 
-export default inject(
-  "auth",
-  "groups",
-  "collectionGroupMemberships",
-  "ui"
-)(AddGroupsToCollection);
+export default withTranslation()<AddGroupsToCollection>(
+  inject(
+    "auth",
+    "groups",
+    "collectionGroupMemberships",
+    "ui"
+  )(AddGroupsToCollection)
+);