Add migrate objective snapshot command

server/books/management/commands/migrate_objective_snapshots.py

@@ -0,0 +1,108 @@
+
+
+import json
+from logging import getLogger
+
+from django.core.management import BaseCommand
+
+from books.management.commands.migrate_objectives_to_content import create_chapter_from_objective_group, \
+    create_content_block_from_objective, create_text_in_content_block
+from books.models import Chapter, ObjectiveGroupSnapshot, ContentBlockSnapshot, Snapshot
+from books.models import ContentBlock
+from books.models import Module
+from objectives.models import Objective, ObjectiveSnapshot, ObjectiveGroup
+
+logger = getLogger(__name__)
+class Command(BaseCommand):
+    def handle(self, *args, **options):
+        prefix = "SNAP "
+        ContentBlock.objects.filter(title__startswith=prefix).delete()
+        Chapter.objects.filter(title__startswith=prefix).delete()
+
+
+
+        analyze()
+
+        createed_content_blocks = 0
+
+        failed_modules = []
+
+        visible_objectives_by_ids = {}
+
+        for module in Module.objects.filter():
+            # try:
+
+            snapshots = Snapshot.objects.filter(module=module)
+            module_snapshot_by_id = {}
+            #chapter = create_chapter_from_objective_group(module)
+
+
+            for snapshot in snapshots:
+                # hier objective snapshots entfernt werden. die werden nicht mehr gebraucht
+                # for objective_group_snapshot in self.objective_groups.through.objects.all():
+                #     if objective_group_snapshot.hidden:
+                #         objective_group_snapshot.objective_group.hidden_for.add(selected_class)
+                default_objectives = Objective.objects.filter(group__module=module, owner__isnull=True)
+                visible_objectives = list(default_objectives)
+                visible_objectives_ids = [objective.id for objective in visible_objectives]
+
+                for hidden_objective in snapshot.hidden_objectives.all():
+                    visible_objectives = [objective for objective in visible_objectives if hidden_objective.id not in visible_objectives_ids]
+                for custom_objective_snapshot in snapshot.custom_objectives.all():
+                    visible_objectives.append(custom_objective_snapshot)
+
+                # filter for unique texts in objectives
+                # TODO: I don't know why this is necessary
+                objectives_by_texts = {}
+                for objective in visible_objectives:
+                    if objective.text not in objectives_by_texts:
+                        objectives_by_texts[objective.text] = objective
+                visible_objectives = list(objectives_by_texts.values())
+
+                if visible_objectives:
+                    # make comvinations of objectives unique, this prevents generatino of many duplicated content blocks
+                    visible_objectives_hash = hash([objective.text for objective in visible_objectives].__str__())
+
+                    visible_objectives_by_ids[visible_objectives_hash] = visible_objectives
+
+
+        for objectives in visible_objectives_by_ids.values():
+            print("")
+            for objective in objectives:
+                print(f"             Objective: {objective.group} {objective}   {objective.owner}")
+            print("-")
+
+        print(f"      visible_objectives_by_ids: {len(visible_objectives_by_ids.items())}")
+
+
+        # create custom content blocks with the objectives
+        createed_content_blocks = 0
+        for objectives in visible_objectives_by_ids.values():
+            module = objectives[0].group.module
+            chapter = create_chapter_from_objective_group(module,  prefix="SNAP ")
+
+            # Owner des custom blocks festlegen
+            custom_content_block = create_content_block_snapshot_from_objective(objectives[0].group, chapter,
+                                                                       owner=None, prefix="SNAP ")
+            create_text_in_content_block(objectives, custom_content_block)
+            createed_content_blocks += 1
+
+        print(f"created_content_blocks: {createed_content_blocks}")
+
+
+def analyze():
+    print(f"""
+    OjectiveGroups: {ObjectiveGroup.objects.count()}
+    Objectives: {Objective.objects.count()}
+    
+    ObjectiveGroupSnapshots: {ObjectiveGroupSnapshot.objects.count()}
+    ObjectivesSnapshots: {ObjectiveSnapshot.objects.count()}
+    
+    
+    ObjectiveGroups: {ObjectiveGroup.objects.filter(objectivegroupsnapshot__isnull=True).count()}
+    Objectives: {Objective.objects.filter(objectivesnapshot__isnull=True).count()}
+    
+    Snapshot: {Snapshot.objects.count()}
+    """)
+
+