Implement JSON mood storage

pyproject.toml

@@ -13,3 +13,4 @@ build-backend = "setuptools.build_meta"
 [tool.pytest.ini_options]
 minversion = "8.0"
 testpaths = ["tests"]
+addopts = "-q"

src/cli.py

@@ -1,6 +1,6 @@
-import sys
+from datetime import date
 import click
-from src.mood_logger import log_mood, latest_entries
+from src.mood_logger import MoodEntry, save_entry, load_entries
 
 @click.group()
 def cli():
@@ -12,16 +12,19 @@ def cli():
 @click.argument("note", type=str, required=False)
 def log(rating, note):
     """Log your mood with RATING (1–10) and optional NOTE."""
-    log_mood(rating, note)
-    click.echo(f"Logged mood {rating}{f' – {note}' if note else ''}")
+    entry = MoodEntry(date.today().isoformat(), rating, note)
+    save_entry(entry)
+    click.echo("Logged!")
 
 @cli.command()
-@click.option("--n", default=5, help="How many entries to show.")
-def latest(n):
-    """Show the last N mood entries."""
-    entries = latest_entries(n)
-    for e in entries:
-        click.echo(f"{e.date}: {e.rating} – {e.note or ''}")
+def latest():
+    """Show the most recent mood entry."""
+    entries = load_entries()
+    if not entries:
+        click.echo("No entries found.")
+        return
+    e = entries[-1]
+    click.echo(f"{e.date}: {e.rating}{f' – {e.note}' if e.note else ''}")
 
 if __name__ == "__main__":
     cli()

src/mood_logger.py

@@ -1,6 +1,7 @@
-from dataclasses import dataclass
+from dataclasses import dataclass, asdict
 from datetime import date
 import csv
+import json
 from pathlib import Path
 from typing import List, Optional
 
@@ -11,6 +12,9 @@ class MoodEntry:
     rating: int
     note: Optional[str] = None
 
+# Default JSON data file stored at the repository root
+DATA_FILE = Path(__file__).resolve().parent.parent / "moods.json"
+
 def log_mood(
     rating: int,
     note: Optional[str] = None,
@@ -50,3 +54,22 @@ def latest_entries(
         for row in rows
     ]
     return entries[-n:]
+
+
+def load_entries() -> List[MoodEntry]:
+    """Load all mood entries from the JSON ``DATA_FILE``."""
+    path = Path(DATA_FILE)
+    if not path.exists():
+        return []
+    with path.open() as f:
+        data = json.load(f)
+    return [MoodEntry(**item) for item in data]
+
+
+def save_entry(entry: MoodEntry) -> None:
+    """Append ``entry`` to ``DATA_FILE``."""
+    path = Path(DATA_FILE)
+    entries = load_entries()
+    entries.append(entry)
+    with path.open("w") as f:
+        json.dump([asdict(e) for e in entries], f)

tests/test_storage.py

@@ -0,0 +1,15 @@
+from datetime import date
+from src import mood_logger
+
+
+def test_save_and_load_round_trip(tmp_path, monkeypatch):
+    data_file = tmp_path / "moods.json"
+    monkeypatch.setattr(mood_logger, "DATA_FILE", data_file)
+
+    entry = mood_logger.MoodEntry(date.today().isoformat(), 8, "feeling good")
+    mood_logger.save_entry(entry)
+
+    assert data_file.exists()
+
+    loaded = mood_logger.load_entries()
+    assert loaded == [entry]