add taskstorage and json file. del task list and fix bugs

Author: maloyparser

simple_backend/src/task_tracker/main.py

@@ -1,35 +1,39 @@
 from fastapi import FastAPI
 from fastapi import HTTPException
-
+from storage import TaskStorage
 app = FastAPI()
-tasks = []
-task_id_counter = 1
+storage = TaskStorage()
 # we display a list of all received tasks.
 @app.get("/tasks")
 def get_tasks():
-    return tasks
+    return storage.load()
 # We add a new task, add it to the task list, and increment the id counter.
 @app.post("/tasks")
 def create_task(name: str, condition: str = 'new'):
-    global task_id_counter
-    task = {'id': task_id_counter, 'name': name, 'condition': condition}
+    tasks = storage.load()
+    new_id = max((task['id'] for task in tasks), start = 0) + 1
+    task = {'id': new_id, 'name': name, 'condition': condition}
     tasks.append(task)
-    task_id_counter += 1
+    storage.save(tasks)
     return task
 # We update the task; if the task is missing, we raise an error.
 @app.put("/tasks/{task_id}")
-def update_task(task_id: int, name:str, condition: str):
+def update_task(task_id: int, name: str, condition: str):
+    tasks = storage.load()
     for task in tasks:
         if task['id'] == task_id:
-            task[name] = name
-            task[condition] = condition
-        return task
+            task['name'] = name
+            task['condition'] = condition
+            storage.save(tasks)
+            return task
     raise HTTPException(status_code = 404, detail = 'task not found')
 # We search for a task by ID, if we find it, we delete it, if not, we raise an error
 @app.delete("/tasks/{task_id}")
 def delete_task(task_id: int):
+    tasks = storage.load()
     for task in tasks:
         if task['id'] == task_id:
             tasks.remove(task)
+            storage.save(tasks)
             return 'task deleted'
     raise HTTPException(status_code = 404, detail = 'task not found')

simple_backend/src/task_tracker/storage.py

@@ -0,0 +1,13 @@
+import json
+import os
+class TaskStorage:
+    def __init__(self, filename: str = 'tasks.json'):
+        self.file = filename
+        if not os.path.exists(self.file):  # if file does not exist, create file with empty list
+            self.save([])
+    def load(self):
+        with open(self.file, 'r', encoding = 'utf-8') as f:
+            return json.load(f)
+    def save(self, tasks):
+        with open(self.file, 'w', encoding = 'utf-8') as f:
+            json.dump(tasks, f)