Add ability to filter users by state

src/users.js

@@ -428,8 +428,10 @@ async function list() {
     return results;
 }
 
-async function listPaged(search, page, perPage) {
+// if active is null then both active and inactive users are listed
+async function listPaged(search, active, page, perPage) {
     assert(typeof search === 'string' || search === null);
+    assert(typeof active === 'boolean' || active === null);
     assert.strictEqual(typeof page, 'number');
     assert.strictEqual(typeof perPage, 'number');
 
@@ -437,11 +439,20 @@ async function listPaged(search, page, perPage) {
 
     if (search) {
         query += ' WHERE ';
+        query += '(';
         query += '(LOWER(users.username) LIKE ' + mysql.escape(`%${search.toLowerCase()}%`) + ')';
         query += ' OR ';
         query += '(LOWER(users.email) LIKE ' + mysql.escape(`%${search.toLowerCase()}%`) + ')';
         query += ' OR ';
         query += '(LOWER(users.displayName) LIKE ' + mysql.escape(`%${search.toLowerCase()}%`) + ')';
+        query += ')';
+    }
+
+    if (active !== null) {
+        if (search) query += ' AND ';
+        else query += ' WHERE ';
+
+        query += 'users.active' + (!active ? ' IS NOT ' : ' IS ') + 'TRUE';
     }
 
     query += ` GROUP BY users.id ORDER BY users.username ASC LIMIT ${(page-1)*perPage},${perPage} `;