mysql : gestion des erreurs en exceptions

[mtweb] / web / app / data / impl / mw_mysql.php

diff --git a/web/app/data/impl/mw_mysql.php b/web/app/data/impl/mw_mysql.php
index 22bd3ce..da86798 100644 (file)
--- a/web/app/data/impl/mw_mysql.php
+++ b/web/app/data/impl/mw_mysql.php
@@ -1,7 +1,7 @@
 <?php
 
-  class mw_mysql
-  {
+  class mw_mysql{
+
     var $link;
 
     var $host;
@@ -13,73 +13,83 @@
 
     function extention_ok(&$env) { return $this->EXTENTION_OK; }
 
-    function mw_mysql($host, $base, $user, $password)
-    { $this->host = $host;
+    function mw_mysql($host, $base, $user, $password){
+      $this->host = $host;
       $this->base = $base;
       $this->user = $user;
       $this->password = $password;
       $this->EXTENTION_OK = function_exists("mysql_connect");
     }
 
-    function connect($host, $base, $user, $password)
-    { $this->link = @mysql_connect($host, $user, $password);
-      if(!$this->link) return null;
+    function connect($host, $base, $user, $password){
+      $this->link = @mysql_connect($host, $user, $password);
+      if(!$this->link) throw new Exception($this->exception_out("Impossible d'etablir une connection au serveur"));
       @mysql_query("SET NAMES 'utf8'");
-      if($base)
-      { $connected = @mysql_select_db($base, $this->link);
-        if(!$connected) return null;
+      if($base){
+        $connected = @mysql_select_db($base, $this->link);
+        if(!$connected) throw new Exception($this->exception_out("Impossible de selectioner la base ".$base));
       }
       return true;
     }
 
-    function select_db($db_name)
-    { $this->base = $db_name;
-      if(!$this->link)
-      { if(!$this->connect($this->host, $this->base, $this->user, $this->password)) return null;
-      }
-      return $this->query("USE ".$db_name);
+    function select_db($db_name){\r
+      $this->base = $db_name;\r
+      if(!$this->link) $this->connect($this->host, $this->base, $this->user, $this->password);\r
+      return $this->query("USE ".$db_name);\r
     }
 
-    function table_exists($table_name)
-    { $sql =  "SHOW TABLES LIKE '".$table_name."'";
-      $rst = $this->query($sql);
-      if(isset($rst))
-      { $exists = false;
-        $v_rst = $this->fetch_assoc($rst);
-        if($v_rst) $exists = true;
-        $this->free_result($rst);
-        return $exists;
-      }
-      return null;
+    function table_exists($base, $table){\r
+      if(!$this->link) $this->connect($this->host, $this->base, $this->user, $this->password);\r
+      $this->select_db($base);\r
+      $rst = $this->query("SHOW TABLES");\r
+      while($v_rst = mysql_fetch_array($rst)){\r
+        if(strcmp($v_rst[0], $table) == 0) return true;\r
+      }\r
+      mysql_free_result($rst);\r
+      return false;\r
+    }
+
+    function query($query_string){\r
+      if(!$this->link) $this->connect($this->host, $this->base, $this->user, $this->password);\r
+      $result = @mysql_query($query_string, $this->link);\r
+      if(!$result) throw new Exception($this->exception_out("Syntaxe invalide dans une requete"));\r
+      return $result;\r
     }
 
-    function query($query_string)
-    { if(!$this->link)
-      { if(!$this->connect($this->host, $this->base, $this->user, $this->password)) return null;
+    function fetch_assoc($rst){
+      if($this->link){
+        if($rst){
+          return mysql_fetch_assoc($rst);
+        }
+        else throw new Exception($this->exception_out("fetch_assoc sans result handler"));
       }
-      $result = @mysql_query($query_string, $this->link);
-      if(!$result) return null;
-      return $result;
+      else throw new Exception($this->exception_out("fetch_assoc sans connexion"));
     }
 
-    function fetch_assoc($rst)
-    { if($rst && $this->link) return mysql_fetch_assoc($rst);
-      return null;
+    function insert_id(){
+      if($this->link){
+        return mysql_insert_id($this->link);
+      }
+      else throw new Exception($this->exception_out("insert_id sans connexion"));
     }
 
-    function insert_id()
-    { if($this->link) return mysql_insert_id($this->link);
-      return null;
+    function free_result($rst){
+      if($this->link){
+        if($rst){
+          return mysql_free_result($rst);
+        }
+        else throw new Exception($this->exception_out("free_result sans result handler"));
+      }
+      else throw new Exception($this->exception_out("free_result sans connexion"));
     }
 
-    function free_result($rst)
-    { if($rst && $this->link) return mysql_free_result($rst);
-      return null;
+    function close(){
+      if($this->link) return mysql_close($this->link);
+      return true;
     }
 
-    function close()
-    { if($this->link) return mysql_close($this->link);
-      return null;
+    function exception_out($message){\r
+      return "[erreur] mysql : ".$message;\r
     }
 
   }