database migration stuff

weather/__init__.py

@@ -23,4 +23,7 @@ def create_app(test_config=None):
     def hello():
         return "'Ello, Wurld!"
 
+    from . import db
+    db.init_app(app)
+
     return app

weather/db.py

@@ -0,0 +1,46 @@
+import sqlite3
+from datetime import datetime
+
+import click
+from flask import current_app, g
+
+
+def get_db():
+    if 'db' not in g:
+        g.db = sqlite3.connect(
+            current_app.config['DATABASE'],
+            detect_types=sqlite3.PARSE_DECLTYPES
+        )
+        g.db.row_factory = sqlite3.Row
+
+    return g.db
+
+def close_db(e=None):
+    db = g.pop('db', None)
+
+    if db is not None:
+        db.close()
+
+def init_db():
+    db = get_db()
+
+    with current_app.open_resource('schema.sql') as f:
+        db.executescript(f.read().decode('utf8'))
+
+
+@click.command('init-db')
+def init_db_command():
+    """Refresh database"""
+    init_db()
+    click.echo('Initialized the database.')
+
+
+sqlite3.register_converter(
+    "timestamp", lambda v: datetime.fromisoformat(v.decode())
+)
+
+
+def init_app(app):
+    app.teardown_appcontext(close_db)
+    app.cli.add_command(init_db_command)
+

weather/schema.sql

@@ -0,0 +1,43 @@
+DROP TABLE IF EXISTS periods;
+DROP TABLE IF EXISTS reports;
+
+CREATE TABLE "periods" (
+    "id" Integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "report_id" Integer NOT NULL,
+    "period_number" Integer NOT NULL,
+    "name" Text,
+    "start_time" DateTime NOT NULL,
+    "end_time" DateTime NOT NULL,
+    "is_daytime" Integer NOT NULL,
+    "temperature" Integer NOT NULL,
+    "temperature_unit" Text NOT NULL DEFAULT 'F',
+    "precipitation_probability" Integer,
+    "dewpoint_celsius" Numeric,
+    "relative_humidity" Integer,
+    "wind_speed" Text,
+    "wind_direction" Text,
+    "icon_url" Text,
+    "short_forecast" Text,
+    "detailed_forecast" Text,
+    "created_at" DateTime,
+    "updated_at" DateTime,
+    CONSTRAINT "periods_reports_CASCADE_NO ACTION_report_id_id_0" FOREIGN KEY ( "report_id" ) REFERENCES "reports"( "id" )
+        ON DELETE Cascade
+ );
+
+CREATE INDEX "periods_report_id_start_time_index" ON "periods"( "report_id", "start_time" );
+
+CREATE TABLE "reports" (
+    "id" Integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "type" Text NOT NULL,
+    "reported_at" DateTime NOT NULL,
+    "generated_at" DateTime NOT NULL,
+    "latitude" Numeric NOT NULL,
+    "longitude" Numeric NOT NULL,
+    "elevation_meters" Numeric,
+    "created_at" DateTime,
+    "updated_at" DateTime,
+CONSTRAINT "check ""type"" in ('hourly', 'weekly')" CHECK ("type" in ('hourly', 'weekly')) );
+
+CREATE INDEX "reports_type_reported_at_index" ON "reports"( "type", "reported_at" );
+CREATE UNIQUE INDEX "reports_type_reported_at_unique" ON "reports"( "type", "reported_at" );