Work on knexifying password resets

src/database/accounts.js

@@ -484,22 +484,6 @@ module.exports = {
         });
     },
 
-    generatePasswordReset: function (ip, name, email, callback) {
-        if (typeof callback !== "function") {
-            return;
-        }
-
-        callback("generatePasswordReset is not implemented", null);
-    },
-
-    recoverPassword: function (hash, callback) {
-        if (typeof callback !== "function") {
-            return;
-        }
-
-        callback("recoverPassword is not implemented", null);
-    },
-
     /**
      * Retrieve a list of channels owned by a user
      */

src/db/password-reset.js

@@ -0,0 +1,53 @@
+import { createMySQLDuplicateKeyUpdate } from '../util/on-duplicate-key-update';
+
+const ONE_DAY = 24 * 60 * 60 * 1000;
+
+class PasswordResetDB {
+    constructor(db) {
+        this.db = db;
+    }
+
+    insert(params) {
+        // TODO: validate params?
+        return this.db.runTransaction(tx => {
+            const insert = tx.table('password_reset').insert(params);
+            // TODO: Support other DBMS besides MySQL
+            // Annoyingly, upsert/on duplicate key update are non-standard
+            // Alternatively, maybe this table shouldn't be an upsert table?
+            const update = tx.raw(createMySQLDuplicateKeyUpdate(
+                ['ip', 'hash', 'email', 'expire']
+            ));
+
+            return tx.raw(insert.toString() + update.toString());
+        });
+    }
+
+    get(hash) {
+        return this.db.runTransaction(tx => {
+            return tx.table('password_reset').where({ hash }).select()
+                    .then(rows => {
+                if (rows.length === 0) {
+                    throw new Error(`No password reset found for hash ${hash}`);
+                }
+
+                return rows[0];
+            });
+        });
+    }
+
+    delete(hash) {
+        return this.db.runTransaction(tx => {
+            return tx.table('password_reset').where({ hash }).del();
+        });
+    }
+
+    cleanup(threshold = ONE_DAY) {
+        return this.db.runTransaction(tx => {
+            return tx.table('password_reset')
+                    .where('expire', '<', Date.now() - ONE_DAY)
+                    .del();
+        });
+    }
+}
+
+export { PasswordResetDB };

src/util/on-duplicate-key-update.js

@@ -0,0 +1,7 @@
+export function createMySQLDuplicateKeyUpdate(columns) {
+    const prefix = ' on duplicate key update ';
+    const updates = columns.map(col => `\`${col}\` = values(\`${col}\`)`)
+            .join(', ');
+
+    return prefix + updates;
+}