feat: Collection admins (#5273

* Split permissions for reading documents from updating collection

* fix: Admins should have collection read permission, tests

* tsc

* Add admin option to permission selector

* Combine publish and create permissions, update -> createDocuments where appropriate

* Plural -> singular

* wip

* Quick version of collection structure loading, will revisit

* Remove documentIds method

* stash

* fixing tests to account for admin creation

* Add self-hosted migration

* fix: Allow groups to have admin permission

* Prefetch collection documents

* fix: Document explorer (move/publish) not working with async documents

* fix: Cannot re-parent document to collection by drag and drop

* fix: Cannot drag to import into collection item without admin permission

* Remove unused isEditor getter

server/migrations/20230429005039-collection-admins.js

@@ -0,0 +1,56 @@
+'use strict';
+
+module.exports = {
+  async up(queryInterface) {
+    if (process.env.DEPLOYMENT === "hosted") {
+      return;
+    }
+
+    await queryInterface.sequelize.transaction(async (transaction) => {
+      // Convert collection members to admins where the user is the only 
+      // membership in the collection.
+      await queryInterface.sequelize.query(
+        `UPDATE collection_users cu
+        SET permission = 'admin'
+        WHERE (
+          SELECT COUNT(*) 
+          FROM collection_users 
+          WHERE "collectionId" = cu."collectionId"
+          AND permission = 'read_write'
+        ) = 1;`,
+        {
+          type: queryInterface.sequelize.QueryTypes.SELECT,
+        }
+      );
+
+      // Convert collection members to admins where the collection is private
+      // and they currently have read_write permission
+      await queryInterface.sequelize.query(
+        `UPDATE collection_users
+        SET permission = 'admin'
+        WHERE permission = 'read_write' 
+        AND "collectionId" IN (
+          SELECT c."id" 
+          FROM collections c
+          WHERE c.permission IS NULL
+        );`,
+        {
+          type: queryInterface.sequelize.QueryTypes.SELECT,
+        }
+      );
+    });
+  },
+
+  async down(queryInterface) {
+    if (process.env.DEPLOYMENT === "hosted") {
+      return;
+    }
+
+    await queryInterface.sequelize.query(
+      "UPDATE collection_users SET permission = 'read_write' WHERE permission = 'admin'",
+      {
+        type: queryInterface.sequelize.QueryTypes.SELECT,
+      }
+    );
+  }
+};