From ad830056b1787573de1dc885b4edd4ce66fd8237 Mon Sep 17 00:00:00 2001
From: Dominique Fournier <dominique@fournier38.fr>
Date: Thu, 13 Mar 2014 19:00:05 +0000
Subject: [PATCH] Add correct read support (filter without value, bad key
 assignement)

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@1218 bf3deb0d-5f1a-0410-827f-c0cc1f45334c
---
 dblayer.php | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/dblayer.php b/dblayer.php
index da34b9d..43dd0ee 100644
--- a/dblayer.php
+++ b/dblayer.php
@@ -46,7 +46,9 @@ class dblayer extends PDO
 
   // TODO !!
   /** Create automatic creation of $fields from .schema of sqlite3/
-      show create table `NomTable`; for MySQL*/ 
+      show create table `NomTable`; for MySQL
+      SQLite3 : PRAGMA TABLE_INFO('yourtable');
+      MYSQL : SHOW COLUMNS FROM yourtable;*/
 
   /** Connection to the database engine
       See http://fr2.php.net/manual/en/pdo.construct.php for the $dsn format */
@@ -100,24 +102,30 @@ class dblayer extends PDO
     return $this->db->lastInsertId();
   }
 
-  /** Read all the table or only one line defined by the primary key */
-  function read ($selectkey=null)
+  /** Read all the table or only one line defined by the select key, the select
+      operator and the associated select value */
+  function read ($selectkey=null, $selectval=null, $selectop="=")
   {
     if ($this->db === null)
       throw new Exception ("Database not connected");
+    if ($selectop !== "=" && $selectop !== "like" && $selectop !== null)
+      throw new Exception ("Invalid selectop");
+    if ($selectkey !== null && 
+        ! in_array ($selectkey, array_keys ($this->fields)))
+      throw new Exception ("Unknown key field provided");
     $req = "SELECT ";
     $req .= implode (",", array_keys ($this->fields));
     $req .= " FROM `".$this->table."`";
-    if ($selectkey !== NULL)
-      $req .= " WHERE $this->primary=:primary";
+    if ($selectkey !== NULL && $selectval !== NULL)
+      $req .= " WHERE $selectkey $selectop :selectkey";
 
     if ($this->debug) echo "DEBUG : $req\n";
     $st = $this->db->prepare ($req);
-    if ($selectkey !== NULL)
+    if ($selectkey !== NULL && $selectval !== NULL)
     {
-      if ($this->debug) echo "DEBUG BIND : primary->".
+      if ($this->debug) echo "DEBUG BIND : selectkey->".
                              var_export ($selectkey, TRUE)."\n";
-      $st->bindValue (":primary", $selectkey);
+      $st->bindValue (":selectkey", $selectval);
     }
     $st->execute ();
     $res = array ();