chore: Migrate authentication to new tables (#1929)

This work provides a foundation for a more pluggable authentication system such as the one outlined in #1317.

closes #1317

server/scripts/20210226232041-migrate-authentication.js

@@ -0,0 +1,102 @@
+// @flow
+import "./bootstrap";
+import debug from "debug";
+import {
+  Team,
+  User,
+  AuthenticationProvider,
+  UserAuthentication,
+} from "../models";
+import { Op } from "../sequelize";
+
+const log = debug("server");
+const cache = {};
+let page = 0;
+let limit = 100;
+
+export default async function main(exit = false) {
+  const work = async (page: number) => {
+    log(`Migrating authentication data… page ${page}`);
+
+    const users = await User.findAll({
+      limit,
+      offset: page * limit,
+      paranoid: false,
+      order: [["createdAt", "ASC"]],
+      where: {
+        serviceId: {
+          [Op.ne]: "email",
+        },
+      },
+      include: [
+        {
+          model: Team,
+          as: "team",
+          required: true,
+          paranoid: false,
+        },
+      ],
+    });
+
+    for (const user of users) {
+      const provider = user.service;
+      const providerId = user.team[`${provider}Id`];
+      if (!providerId) {
+        console.error(
+          `user ${user.id} has serviceId ${user.serviceId}, but team ${provider}Id missing`
+        );
+        continue;
+      }
+      if (providerId.startsWith("transferred")) {
+        console.log(
+          `skipping previously transferred ${user.team.name} (${user.team.id})`
+        );
+        continue;
+      }
+
+      let authenticationProviderId = cache[providerId];
+      if (!authenticationProviderId) {
+        const [
+          authenticationProvider,
+        ] = await AuthenticationProvider.findOrCreate({
+          where: {
+            name: provider,
+            providerId,
+            teamId: user.teamId,
+          },
+        });
+
+        cache[providerId] = authenticationProviderId =
+          authenticationProvider.id;
+      }
+
+      try {
+        await UserAuthentication.create({
+          authenticationProviderId,
+          providerId: user.serviceId,
+          teamId: user.teamId,
+          userId: user.id,
+        });
+      } catch (err) {
+        console.error(
+          `serviceId ${user.serviceId} exists, for user ${user.id}`
+        );
+        continue;
+      }
+    }
+
+    return users.length === limit ? work(page + 1) : undefined;
+  };
+
+  await work(page);
+
+  if (exit) {
+    log("Migration complete");
+    process.exit(0);
+  }
+}
+
+// In the test suite we import the script rather than run via node CLI
+if (process.env.NODE_ENV !== "test") {
+  main(true);
+}