1 files changed, 71 insertions, 0 deletions
diff --git a/sql.py b/sql.py
new file mode 100644
index 0000000..b3db165
--- /dev/null
+++ b/sql.py
@@ -0,0 +1,71 @@
+import sqlite3
+
+class db:
+    def __init__(self, dbfile):
+        # final variable
+        self.dbfile = dbfile
+        try:
+            open(dbfile)
+        except FileNotFoundError:
+            self.setup()
+    def exec(cmd):
+        con = sqlite3.connect(self.dbfile)
+        cur = con.cursor
+        cur.execute(cmd)
+        con.commit()
+        con.close()
+
+def setup(dbfile):
+    '''
+    Necessary when the database does not exist and the tables must be
+    created for the first time, otherwise not needed to be run.
+    '''
+    con = sqlite3.connect(dbfile)
+    cur = con.cursor()
+    cur.execute(
+            '''
+    CREATE TABLE temperature (
+        date        text not null, 
+        time        integer not null, 
+        temperature            real,
+        target           real,
+        PRIMARY KEY (date, time)
+    );
+            '''
+            )
+    cur.execute(
+            '''
+    CREATE TABLE weather (
+        date        text not null,
+        temperature real,
+        wind        real,
+        PRIMARY KEY (date),
+        FOREIGN KEY (date) REFERENCES temperature(date)
+    );
+            '''
+            )
+    cur.execute(
+            '''
+    CREATE TABLE schedule (
+        day        text not null, 
+        time        integer not null, 
+        temperature real,
+        PRIMARY KEY (day, time)
+            '''
+    );
+    cur.execute(
+            '''
+    CREATE TABLE history (
+        date        text not null,
+        time        integer not null, 
+        heating_on  integer,
+        PRIMARY KEY (day, time),
+        FOREIGN KEY (date) REFERENCES temperature(date),
+        FOREIGN KEY (time) REFERENCES temperature(time)
+            '''
+    );
+    con.commit()
+    con.close()
+    pass
+    def export_csv(self):
+        return 0