convert Pi.py to use sqlite backend

modules/Pi.py

@@ -19,6 +19,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 from ConfigParser import NoOptionError, NoSectionError
 import math
 import random
+import sqlite3
 
 from extlib import irclib
 
@@ -34,21 +35,53 @@ class Pi(Module):
     Idea from #linode on OFTC. Code from http://www.eveandersson.com/pi/monte-carlo-circle
     """
 
+    def db_init(self):
+        """
+        Initialize database tables.
+        """
+
+        # init the database if pi table doesn't exist
+        version = self.db_module_registered(self.__class__.__name__)
+        if version == None:
+            # create tables
+            db = self.get_db()
+            try:
+                db.execute('''
+                    CREATE TABLE pi_log (
+                        id INTEGER PRIMARY KEY AUTOINCREMENT,
+                        count_inside INTEGER NOT NULL,
+                        count_total INTEGER NOT NULL,
+                        time TEXT DEFAULT CURRENT_TIMESTAMP
+                    )
+                    ''')
+                db.execute('''
+                    CREATE VIEW pi_latest_pi AS
+                        SELECT count_inside, count_total
+                        FROM pi_log
+                        WHERE id = last_insert_rowid()
+                    ''')
+                db.execute('INSERT INTO drbotzo_modules VALUES (?,?)', (self.__class__.__name__, 1))
+                db.commit()
+            except sqlite3.Error as e:
+                db.rollback()
+                print("sqlite error: " + str(e))
+                raise
+
     def do(self, connection, event, nick, userhost, replypath, what, admin_unlocked):
         if what == "pi":
+            db = self.get_db()
             try:
-                if not self.config.has_section(self.__class__.__name__):
-                    self.config.add_section(self.__class__.__name__)
+                cur = db.cursor()
+                pi_data = cur.execute('SELECT * FROM pi_latest_pi')
+                datum = pi_data.fetchone()
 
-                # set default values if unset
-                if not self.config.has_option(self.__class__.__name__, "count_inside"):
-                    self.config.set(self.__class__.__name__, "count_inside", "0")
-                if not self.config.has_option(self.__class__.__name__, "count"):
-                    self.config.set(self.__class__.__name__, "count", "0")
-
-                # load values from config
-                count_inside    = self.config.getint(self.__class__.__name__, "count_inside")
-                count           = self.config.getint(self.__class__.__name__, "count")
+                if datum == None:
+                    count_inside    = 0
+                    count           = 0
+                else:
+                    # load values
+                    count_inside    = datum['count_inside']
+                    count           = datum['count_total']
 
                 x = random.random()
                 y = random.random()
@@ -60,11 +93,13 @@ class Pi(Module):
                 count += 1
                 pi = 4.0 * count_inside / count
 
-                self.config.set(self.__class__.__name__, "count_inside", str(count_inside))
-                self.config.set(self.__class__.__name__, "count", str(count))
+                cur.execute('INSERT INTO pi_log (count_inside, count_total) VALUES (?,?)', (count_inside, count))
+                db.commit()
+            except sqlite3.Error as e:
+                db.rollback()
+                return self.reply(connection, replypath, "sqlite error: " + str(e))
 
             return self.reply(connection, replypath, "({0:.10f}, {1:.10f}) is {2}within the circle. pi is {5:.10f} ({3:d}/{4:d}).".format(x, y, "" if inside else "not ", count_inside, count, pi));
-            except NoOptionError, NoSectionError: pass
 
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 # kate: indent-mode python;indent-width 4;replace-tabs on;