Add 404 page to catch all unspecified requests. (hedyorg#1120)

app.py

@@ -80,7 +80,7 @@ def load_adventure_for_language(lang):
 
     if not adventures_for_lang.has_adventures():
         # The default fall back language is English
-        fall_back = FALL_BACK_ADVENTURE.get(lang, "en")        
+        fall_back = FALL_BACK_ADVENTURE.get(lang, "en")
         adventures_for_lang = ADVENTURES[fall_back]
     return adventures_for_lang.adventures_file['adventures']
 
@@ -513,7 +513,7 @@ def get_quiz(level_source, question_nr, attempt):
                             option_obj['char_index'] = char_array[i]
                     i += 1
                 question_obj.append(option_obj)
-                
+
             html_obj = render_template('quiz_question.html',
                                    quiz=quiz_data,
                                    level_source=level_source,
@@ -819,6 +819,10 @@ def client_messages():
 
     return response
 
+@app.errorhandler(404)
+def not_found(exception):
+    return utils.page_404 (TRANSLATIONS, render_main_menu('adventures'), current_user(request) ['username'], requested_lang (), TRANSLATIONS.get_translations (requested_lang (), 'ui').get ('page_not_found'))
+
 @app.errorhandler(500)
 def internal_error(exception):
     import traceback

coursedata/texts/en.yaml

@@ -38,6 +38,7 @@ ui:
     no_such_adventure_level: "No such level for this Hedy adventure!"
     no_such_program: "No such Hedy program!"
     invalid_teacher_invitation_code: "The teacher invitation code is invalid. To become a teacher, reach out to [email protected]."
+    page_not_found: "We could not find that page!"
 ClientErrorMessages:
     Transpile_warning: "Warning!"
     Transpile_error: "We can't run your program."

coursedata/texts/es.yaml

@@ -27,6 +27,7 @@ ui:
     switch_to_another_adventure: "Elegir otra aventura"
     commands_title: "Comandos"
     by: "por"
+    page_not_found: "¡No pudimos encontrar esta página!"
 ClientErrorMessages:
     Transpile_warning: "¡Atención!"
     Transpile_error: "El servidor no puede traducir este programa."

coursedata/texts/nl.yaml

@@ -28,7 +28,8 @@ ui:
     commands_title: "Commando's"
     by: "door"
     start_quiz: "Naar de quiz"
-    invalid_teacher_invitation_code: "Deze leerkrachtenuitnodigingscode is niet geldig. ALs je een nieuwe uitnodiging nodig hebt, neem dan contact op met [email protected]"
+    invalid_teacher_invitation_code: "Deze leerkrachtenuitnodigingscode is niet geldig. Als je een nieuwe uitnodiging nodig hebt, neem dan contact op met [email protected]"
+    page_not_found: "We konden deze pagina niet vinden!"
 ClientErrorMessages:
     Transpile_warning: "Let op!"
     Transpile_error: "We konden je code niet goed lezen."