From fc90c0dd2d03a4e842a5f4df546da868850d9657 Mon Sep 17 00:00:00 2001
From: Timotej Lazar <timotej.lazar@fri.uni-lj.si>
Date: Tue, 23 Feb 2016 17:48:01 +0100
Subject: Ensure a ~1 second delay before displaying test results

---
 js/codeq/core.js   | 17 ++++++++++++++++-
 js/codeq/prolog.js | 41 ++++++++++++++++++++++++-----------------
 js/codeq/python.js | 17 +++++++++++++----
 3 files changed, 53 insertions(+), 22 deletions(-)

diff --git a/js/codeq/core.js b/js/codeq/core.js
index 84bbfa8..b1d4a5c 100644
--- a/js/codeq/core.js
+++ b/js/codeq/core.js
@@ -329,8 +329,23 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
             });
         },
 
-        // codeq event handling
+        // resolve a promise not sooner than after [timeout] seconds
+        // from https://github.com/kriskowal/q/commit/681f6d201842d4b99bab5451ebc57ef0c3c0d49a
+        'throttle': function (promise, timeout) {
+            if (timeout === undefined) {
+                timeout = promise;
+                promise = undefined;
+            }
 
+            var deferred = Q.defer();
+            Q.when(promise, undefined, undefined, deferred.notify);
+            setTimeout(function () {
+                deferred.resolve(promise);
+            }, timeout);
+            return deferred.promise;
+        },
+
+        // codeq event handling
         'fire': function (eventName, args) {
             queuedEvents.push({'name': eventName, 'args': args});
             fireEvents();
diff --git a/js/codeq/prolog.js b/js/codeq/prolog.js
index 3d34423..ea4c9b2 100644
--- a/js/codeq/prolog.js
+++ b/js/codeq/prolog.js
@@ -284,28 +284,35 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
         });
 
         jqBtnTest.on('click', function () {
+            // random timeout before returning results to the user, helps
+            // maintain the illusion
+            var timeout = 500 + Math.random() * 1000;
+
             editor.setOption('readOnly', true);
             terminal.inputDisable();
             jqBtnTest.ladda('start');
-            codeq.comms.sendTest({
+
+            codeq.throttle(
+                codeq.comms.sendTest({
                     'program': editor.getDoc().getValue(),
                     'problem_id': problemDef.id
-                })
-                .then(function (data) {
-                    if (data.code === 0) {
-                        hinter.handle(data.hints);
-                    }
-                    else {
-                        terminal.append(data.message + '\n', 'error');
-                    }
-                })
-                .fail(commError)
-                .fin(function () {
-                    editor.setOption('readOnly', false);
-                    terminal.inputEnable();
-                    jqBtnTest.ladda('stop');
-                })
-                .done();
+                }),
+                timeout)
+            .then(function (data) {
+                if (data.code === 0) {
+                    hinter.handle(data.hints);
+                }
+                else {
+                    terminal.append(data.message + '\n', 'error');
+                }
+            })
+            .fail(commError)
+            .fin(function () {
+                editor.setOption('readOnly', false);
+                terminal.inputEnable();
+                jqBtnTest.ladda('stop');
+            })
+            .done();
         });
 
         codeq.comms.loadProblem(problemDef.id).done();
diff --git a/js/codeq/python.js b/js/codeq/python.js
index f2b0184..2ea960a 100644
--- a/js/codeq/python.js
+++ b/js/codeq/python.js
@@ -240,12 +240,20 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
             }
         });
         jqBtnTest.on('click', function () {
+            // random timeout before returning results to the user, helps
+            // maintain the illusion
+            var timeout = 500 + Math.random() * 1000;
+
             editor.setOption('readOnly', true);
+            terminal.inputDisable();
             jqBtnTest.ladda('start');
-            codeq.comms.sendTest({
-                'program': editor.getDoc().getValue(),
-                'problem_id': problemDef.id
-            })
+
+            codeq.throttle(
+                codeq.comms.sendTest({
+                    'program': editor.getDoc().getValue(),
+                    'problem_id': problemDef.id
+                }),
+                timeout)
             .then(function (data) {
                 if (data.code === 0) {
                     hinter.handle(data.hints);
@@ -257,6 +265,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
             .fail(commError)
             .fin(function () {
                 editor.setOption('readOnly', false);
+                terminal.inputEnable();
                 jqBtnTest.ladda('stop');
             })
             .done();
-- 
cgit v1.2.1