Add lookupAccountByHandle

src/db.zig

@@ -91,6 +91,14 @@ pub const MemoryDb = struct {
 
         return acc;
     }
+
+    pub fn lookupAccountByHandle(self: *Self, handle: []const u8) !?Account {
+        for (self.accounts.items) |a| {
+            if (ciutf8.eql(handle, a.handle)) return a;
+        }
+
+        return null;
+    }
 };
 
 test "createAccount" {
@@ -118,3 +126,18 @@ test "createAccount" {
     next_id.val = admin_id;
     try std.testing.expectError(error.DuplicateId, db.createAccount("jaina"));
 }
+
+test "lookupAccountByHandle" {
+    var next_id = ConstId{};
+    var db = MemoryDb.init(std.testing.allocator, next_id.source());
+    defer db.deinit();
+
+    const admin_id = try Uuid.parse("00000000-ffff-0000-0000-000000000000");
+    const sally_id = try Uuid.parse("00000000-eeee-0000-0000-000000000000");
+
+    next_id.val = admin_id;
+    _ = try db.createAccount("admin");
+
+    next_id.val = sally_id;
+    _ = try db.createAccount("sally");
+}