New feature: h displays help

README.md

@@ -18,8 +18,8 @@ At the moment, an alpha version is undertaken, with these features:
 - Set an active user (`a number_of_user`)
 - Show the pieces stored in the database (`s`)
 - Mark pieces as mastered for the active user (`m number_of_work`)
-- Show pieces by composer (`sc` shows composers, `c number_of_composer` shows pieces)
+- Show pieces by composer (`c` shows composers, `s number_of_composer` shows pieces)
-- Show movements through pieces (`sp piece_number`)
+- Show movements through works (`sw work_number`)
 - Mark movement as mastered for active user (`m number_of_work number_of_movement`)
 - (planned) Show possible commands (`h`)
 - (planned) Show mastered works/movements for activated user

rep_cli.py

@@ -6,15 +6,15 @@ class Session:
         self.user = -1
         self.db_agent = db_agent
         self.resultstring = 'no results yet'
-        self.commands = {'a': (self.set_user, ''),
+        self.commands = {'a': (self.set_user, 'Set an active user\n   Usage: a number_of_user'),
-                         'c': (self.show_composers, ''),
+                         'c': (self.show_composers, 'Shows composers'),
-                         'm': (self.mark_work_as_mastered, ''),
+                         'h': (self.show_help, 'Displays this help document'),
-                         'n': (self.create_new_user, ''),
+                         'm': (self.mark_work_as_mastered, 'Marks work or movement as mastered for the active user\n   Usage: m number_of_work, m number_of_work number_of_movement'),
-                         's': (self.show_works, ''),
+                         'n': (self.create_new_user, 'Creates new user\n   Usage: n firstname name'),
-                         'sc': (self.show_works, ''),
+                         's': (self.show_works, 'Show the works stored in the database\n   Usage: s, s number_of_composer'),
-                         'sp': (self.show_movements, ''),
+                         'sw': (self.show_movements, 'Show movements of a work\n   Usage: sw work_number'),
-                         'su': (self.show_users, ''),
+                         'su': (self.show_users, 'Show all users'),
-                         'q': (self.quit, '')
+                         'q': (self.quit, 'Quits the program')
                         }
 
     def set_user(self, arguments):
@@ -67,6 +67,19 @@ class Session:
             fun_resultstring += f'{item[0]}: {item[2]}, {item[1]}\n'
         return fun_resultstring
 
+    def show_help(self, arguments):
+        fun_resultstring = ''
+        if len(arguments) > 0:
+            qu_com = arguments[0]
+            if qu_com in self.commands:
+                fun_resultstring += f'{qu_com}: {self.commands[qu_com][1]}'
+            else:
+                fun_resultstring += f'Command {qu_com} not known, for help press h'
+        else:
+            for key, value in self.commands.items():
+                fun_resultstring += f'{key}: {value[1]}\n'
+        return fun_resultstring
+
     def show_movements(self, arguments):
         work_id = arguments[0]
         work = work_under_id(work_id, self.db_agent)