public attr / function, constructeurs __construct

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

diff --git a/mw/app/data/impl/mw_mysql.php b/mw/app/data/impl/mw_mysql.php
index 0cff0c2..8a58384 100644 (file)
--- a/mw/app/data/impl/mw_mysql.php
+++ b/mw/app/data/impl/mw_mysql.php
@@ -2,26 +2,34 @@
 
   class mw_mysql{
 
-    var $link;
-
-    var $host;
-    var $base;
-    var $user;
-    var $password;
+    public $link;
+    public $host;
+    public $base;
+    public $user;
+    public $password;
+    public $EXTENTION_OK;
+
+    public function __construct($params = array()){
+      $this->host = isset($params["host"]) ? $params["host"] : "localhost";
+      $this->base = isset($params["base"]) ? $params["base"] : "mtweb";
+      $this->user = isset($params["user"]) ? $params["user"] : "";
+      $this->password = isset($params["password"]) ? $params["password"] : "";
+      $this->EXTENTION_OK = function_exists("mysql_connect");
+    }
 
-    var $EXTENTION_OK;
+    public function extention_ok(&$env){
+      return $this->EXTENTION_OK;
+    }
 
-    function extention_ok(&$env) { return $this->EXTENTION_OK; }
+    public function authentication_required(){
+      return true;
+    }
 
-    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");
+    public function sgbd_name(){
+      return "MySql";
     }
 
-    function connect($host, $base, $user, $password){
+    public function connect($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'");
@@ -32,30 +40,77 @@
       return true;
     }
 
-    function select_db($db_name){\r
+    public function select_db($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($table){\r
+    public function desc_table($table_name){
+      $sql = "SELECT * from information_schema.columns where table_name='".$table_name."'";
+      $rst = $this->query($sql);
+      $desc = array(
+        "name" => $table_name,
+        "attributs" => array()
+      );
+      try{
+        while($v_rst = $this->fetch_assoc($rst)){\r
+          $desc["attributs"][$v_rst["COLUMN_NAME"]] = array(
+            "name" => $v_rst["COLUMN_NAME"],
+            "prymary_key" => $v_rst["COLUMN_KEY"] == "PRI" ? true : false,
+            "auto_increment" => $v_rst["EXTRA"] == "auto_increment" ? true : false
+          );
+        }\r
+        $this->free_result($rst);
+      }
+      catch(Exception $e){
+        throw new Exception($this->exception_out("Impossible de lire la description de la table"));
+      }
+      return $desc;
+    }
+
+    public function table_exists($table_name){\r
+      if(!$this->link) $this->connect($this->host, $this->base, $this->user, $this->password);\r
+      $EXISTS = false;
+      try{
+        $rst = $this->query("SHOW TABLES");
+        while($v_rst = mysql_fetch_row($rst)){\r
+          if($v_rst[0] == $table_name){
+            $EXISTS = true;
+            break;
+          }\r
+        }\r
+        $this->free_result($rst);
+      }
+      catch(Exception $e){
+        throw new Exception($this->exception_out("Impossible de savoir si la table existe"));
+      }
+      return $EXISTS;
+    }
+
+    public function field_exists($table_name, $field_name){
       if(!$this->link) $this->connect($this->host, $this->base, $this->user, $this->password);\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
+      if(!($desc = $this->desc_table($table_name))){
+        throw new Exception($this->exception_out("Impossible de lire la description de la table"));
+      }
+      $EXISTS = false;
+      foreach($desc["attributs"] as $attribut_name => $attribut){
+        if($field_name == $attribut_name){
+          $EXISTS = true;
+          break;
+        }
+      }
+      return $EXISTS;
     }
 
-    function query($query_string){\r
+    public function query($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 fetch_assoc($rst){
+    public function fetch_assoc($rst){
       if($this->link){
         if($rst){
           return mysql_fetch_assoc($rst);
@@ -65,14 +120,14 @@
       else throw new Exception($this->exception_out("fetch_assoc sans connexion"));
     }
 
-    function insert_id(){
+    public function insert_id(){
       if($this->link){
         return mysql_insert_id($this->link);
       }
       else throw new Exception($this->exception_out("insert_id sans connexion"));
     }
 
-    function free_result($rst){
+    public function free_result($rst){
       if($this->link){
         if($rst){
           return mysql_free_result($rst);
@@ -82,15 +137,13 @@
       else throw new Exception($this->exception_out("free_result sans connexion"));
     }
 
-    function close(){
+    public function close(){
       if($this->link) return mysql_close($this->link);
       return true;
     }
 
-    function exception_out($message){\r
+    public function exception_out($message){\r
       return "[erreur] mysql : ".$message;\r
     }
 
   }
-
-?>
\ No newline at end of file