Merge pull request #369 from wackazong/python-transform

Transform algorithm in python 3

Author: mevdschee

lib/php_crud_api_transform.py

@@ -0,0 +1,35 @@
+def php_crud_api_transform(tables):
+
+    def get_objects(tables, table_name, where_index=None, match_value=None):
+        objects = []
+        for record in tables[table_name]['records']:
+            if where_index == None or (record[where_index] == match_value):
+                object = {}
+                columns = tables[table_name]['columns']
+                for column in columns:
+                    index = columns.index(column)
+                    object[column] = record[index]
+                    for relation, reltable in tables.items():
+                        for key, target in reltable.get('relations', {}).items():
+                            if target == table_name + '.' + column:
+                                relcols = reltable['columns']
+                                column_indices = {value: relcols.index(value) for value in relcols}
+                                object[relation] = get_objects(
+                                    tables, relation, column_indices[key], record[index])
+                objects.append(object)
+        return objects
+
+    tree = {}
+    for name, table in tables.items():
+        if not 'relations' in table:
+            tree[name] = get_objects(tables, name)
+            if 'results' in table:
+                tree['_results'] = table['results']
+    return tree
+
+
+if __name__ == "__main__":
+    input = {"posts": {"columns": ["id","user_id","category_id","content"],"records": [[1,1,1,"blogstarted"]]},"post_tags": {"relations": {"post_id": "posts.id"},"columns": ["id","post_id","tag_id"],"records": [[1,1,1],[2,1,2]]},"categories": {"relations": {"id": "posts.category_id"},"columns": ["id","name"],"records": [[1,"anouncement"]]},"tags": {"relations": {"id": "post_tags.tag_id"},"columns": ["id","name"],"records": [[1,"funny"],[2,"important"]]},"comments": {"relations": {"post_id": "posts.id"},"columns": ["id","post_id","message"],"records": [[1,1,"great"],[2,1,"fantastic"]]}}
+    output = {"posts": [{"id": 1,"post_tags": [{"id": 1,"post_id": 1,"tag_id": 1,"tags": [{"id": 1,"name": "funny"}]},{"id": 2,"post_id": 1,"tag_id": 2,"tags": [{"id": 2,"name": "important"}]}],"comments": [{"id": 1,"post_id": 1,"message": "great"},{"id": 2,"post_id": 1,"message": "fantastic"}],"user_id": 1,"category_id": 1,"categories": [{"id": 1,"name": "anouncement"}],"content": "blogstarted"}]}
+
+    print(php_crud_api_transform(input)  == output)