Convert CFBank to sqlite3

python/CFBank.py

@@ -4,15 +4,15 @@ Created by: Joris Bontje <jbontje@suespammers.org>
 This module stores bank account information.
 """
 
-import os.path
-import shelve
-
 import Crossfire
+import CFSqlDb as cfdb
 
 class CFBank:
-    def __init__(self, bankfile):
-        self.bankdb_file = os.path.join(Crossfire.LocalDirectory(), bankfile)
-        self.bankdb = shelve.open(self.bankdb_file)
+    def __init__(self):
+        self.bankdb = cfdb.open()
+
+    def init_schema(self):
+        self.bankdb.execute("CREATE TABLE IF NOT EXISTS bank_accounts ('name' TEXT PRIMARY KEY, 'balance' INT);")
 
     def __enter__(self):
         return self
@@ -20,60 +20,51 @@ class CFBank:
     def __exit__(self, exc_type, exc_value, traceback):
         self.close()
 
+    def ensure(self, user):
+        self.bankdb.execute("INSERT OR IGNORE INTO bank_accounts VALUES (?, 0)", (user,))
+
     def deposit(self, user, amount):
-        if not user in self.bankdb:
-            self.bankdb[user] = amount
-        else:
-            balance = self.bankdb[user]
-            self.bankdb[user] = balance + amount
+        if amount > 0:
+            self.ensure(user)
+            self.bankdb.execute("UPDATE bank_accounts SET balance = balance + ? WHERE name=?", (amount, user))
 
     def withdraw(self, user, amount):
-        if user in self.bankdb:
-            balance = self.getbalance(user)
-            if balance >= amount:
-                self.bankdb[user] = balance - amount
-                return 1
+        if self.getbalance(user) - amount < 0:
             return 0
+        else:
+            self.bankdb.execute("UPDATE bank_accounts SET balance = balance - ? WHERE name=?", (amount, user))
+            return 1
 
     def getbalance(self, user):
-        self._convert(user)
-        if user in self.bankdb:
-            return self.bankdb[user]
+        self.convert_legacy_balance(user)
+        c = self.bankdb.cursor()
+        c.execute("SELECT balance FROM bank_accounts WHERE name=?", (user,))
+        result = c.fetchone()
+        if result is not None:
+            return result[0]
         else:
             return 0
 
     def remove_account(self, user):
-        if user in self.bankdb:
-            del self.bankdb[user]
-            Crossfire.Log(Crossfire.LogDebug,
-                          "%s's bank account removed." % user)
-            return 1
-        else:
-            return 0
+        c.execute("DELETE FROM bank_accounts WHERE name=?", (user,))
 
     def close(self):
+        self.bankdb.commit()
         self.bankdb.close()
 
-    def _convert(self, name):
+    def convert_legacy_balance(self, name):
         """Move a player's balance from the player file to the bank."""
         player = Crossfire.FindPlayer(name)
         if player is None:
-            return 0
-        old_balance = _balance_legacy(player)
-        if old_balance > 0:
-            Crossfire.Log(Crossfire.LogInfo,
-                    "Converting bank account for %s with %d silver" \
-                            % (name, old_balance))
+            return
+        balance_str = player.ReadKey("balance")
+        try:
+            old_balance = int(balance_str)
+            Crossfire.Log(Crossfire.LogInfo, "Converting bank account for %s with %d silver" % (name, old_balance))
             self.deposit(name, old_balance)
-            player.WriteKey("balance", "moved-to-bank-file", 1)
+        except ValueError:
+            pass
+        player.WriteKey("balance", None, 0)
 
 def open():
-    return CFBank('ImperialBank_DB')
-
-def _balance_legacy(player):
-    """Return the balance of the given player's bank account."""
-    try:
-        balance_str = player.ReadKey("balance")
-        return int(balance_str)
-    except ValueError:
-        return 0
+    return CFBank()

python/CFSqlDb.py

@@ -0,0 +1,8 @@
+import os.path
+import sqlite3
+
+import Crossfire
+
+def open():
+    path = os.path.join(Crossfire.LocalDirectory(), 'crossfire.db')
+    return sqlite3.connect(path)

python/events/init/CFBank_Init.py

@@ -0,0 +1,39 @@
+import os.path
+
+import Crossfire
+import CFBank
+
+def convert_bdb(bank):
+    path = os.path.join(Crossfire.LocalDirectory(), 'ImperialBank_DB.db')
+    if os.path.isfile(path):
+        Crossfire.Log(Crossfire.LogInfo, "Converting ImperialBank_DB.db (BDB)")
+        import berkeleydb.dbshelve as shelve
+        accounts = shelve.open(path, 'r')
+        for account in accounts.keys():
+            name = account.decode('ascii')
+            balance = accounts[account]
+            bank.deposit(name, balance)
+        accounts.close()
+        bak_file = os.path.join(Crossfire.LocalDirectory(), 'ImperialBank_DB.db.bak')
+        os.rename(path, bak_file)
+
+def convert(bank):
+    path = os.path.join(Crossfire.LocalDirectory(), 'ImperialBank_DB')
+    if os.path.isfile(path):
+        Crossfire.Log(Crossfire.LogInfo, "Converting ImperialBank_DB (DBM)")
+        import shelve
+        s = shelve.open(path, 'r')
+        for name, balance in s.iteritems():
+            bank.deposit(name, balance)
+        s.close()
+        bak_file = os.path.join(Crossfire.LocalDirectory(), 'ImperialBank_DB.bak')
+        os.rename(path, bak_file)
+
+def main():
+    Crossfire.Log(Crossfire.LogInfo, "Initializing CFBank")
+    with CFBank.CFBank() as bank:
+        bank.init_schema()
+        convert_bdb(bank)
+        convert(bank)
+
+main()