mindarc task from Hanwei Huang

README.md

@@ -83,3 +83,35 @@ On completion, you should be able to provide an archive (<your_name>\_\<date>.ta
 - media (directory with sample images inside)
 
 Feel free to provide an archive with these deliverables, or if you prefer, fork this branch on github and push your changes as a feature branch using the same naming convention as required for the archive.
+
+
+#Doc
+Code example 
+```
+//run poptable 
+$poptable = PopTable::getInstance()->run();
+echo $poptable;
+//run migrate
+$migrate = PopTable::getInstance()->run();
+echo $migrate
+
+```
+
+###wrong code table
+| Name | Description |
+| :---: | :---: |
+| 4x    | |
+| 4001 | db connection failed |
+| 4002 | initial table failed|
+| 4003 | fail to build sql|
+| 4004 | fail to insert data|
+| 4005 | no data read from original table|
+| 4006 | fail to read data from file| 
+
+| 2001 | success|
+
+
+#upload image
+1. In order to avoid images replaced by the same name image,
+the file name saved by this rule: 
+time_filename.jpg

exercise_dump.sql

@@ -0,0 +1,95 @@
+# ************************************************************
+# Sequel Pro SQL dump
+# Version 4541
+#
+# http://www.sequelpro.com/
+# https://github.com/sequelpro/sequelpro
+#
+# Host: 127.0.0.1 (MySQL 5.7.17)
+# Database: mindarc_assessment
+# Generation Time: 2019-02-15 14:20:50 +0000
+# ************************************************************
+
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!40101 SET NAMES utf8 */;
+/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
+/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
+/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
+
+
+# Dump of table migrated_data
+# ------------------------------------------------------------
+
+DROP TABLE IF EXISTS `migrated_data`;
+
+CREATE TABLE `migrated_data` (
+  `product_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
+  `sku` varchar(50) NOT NULL DEFAULT '',
+  `name` varchar(255) NOT NULL DEFAULT '',
+  `image_url` varchar(255) DEFAULT '',
+  PRIMARY KEY (`product_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
+LOCK TABLES `migrated_data` WRITE;
+/*!40000 ALTER TABLE `migrated_data` DISABLE KEYS */;
+
+INSERT INTO `migrated_data` (`product_id`, `sku`, `name`, `image_url`)
+VALUES
+	(1,'men_red_shirt','Mens Red Shirt',''),
+	(2,'women_red_blouse','Womens Red Blouse','1550240237_4.jpeg'),
+	(3,'men_blue_shorts','Mens Blue Shorts',''),
+	(4,'women_blue_skirt','Womens Blue Skirt',''),
+	(5,'women_rainbow_singlet','Singlet in Rainbow Colours',''),
+	(6,'women_sun_one','Aviator Sunglasses',''),
+	(7,'women_gold_neck','Gold Necklace Chain',''),
+	(8,'women_iph_case','Iphone Case pink',''),
+	(9,'men_sam_case','Samsung Case Skulls',''),
+	(10,'men_black_shirt','AC/DC Shirt','');
+
+/*!40000 ALTER TABLE `migrated_data` ENABLE KEYS */;
+UNLOCK TABLES;
+
+
+# Dump of table original_data
+# ------------------------------------------------------------
+
+DROP TABLE IF EXISTS `original_data`;
+
+CREATE TABLE `original_data` (
+  `product_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
+  `product_code` varchar(50) NOT NULL DEFAULT '',
+  `product_label` varchar(255) NOT NULL DEFAULT '',
+  `gender` varchar(255) DEFAULT '',
+  PRIMARY KEY (`product_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
+LOCK TABLES `original_data` WRITE;
+/*!40000 ALTER TABLE `original_data` DISABLE KEYS */;
+
+INSERT INTO `original_data` (`product_id`, `product_code`, `product_label`, `gender`)
+VALUES
+	(1,'red_shirt','Mens Red Shirt','m'),
+	(2,'red_blouse','Womens Red Blouse','f'),
+	(3,'blue_shorts','Mens Blue Shorts','m'),
+	(4,'blue_skirt','Womens Blue Skirt','f'),
+	(5,'rainbow_singlet','Singlet in Rainbow Colours','v'),
+	(6,'sun_one','Aviator Sunglasses','f'),
+	(7,'gold_neck','Gold Necklace Chain',''),
+	(8,'iph_case','Iphone Case pink',' F'),
+	(9,'sam_case','Samsung Case Skulls','M'),
+	(10,'black_shirt','AC/DC Shirt','m');
+
+/*!40000 ALTER TABLE `original_data` ENABLE KEYS */;
+UNLOCK TABLES;
+
+
+
+/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
+/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
+/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
+/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;

image-uploader.php

@@ -0,0 +1,100 @@
+<?php
+//run if $_FILES exist
+if(!empty($_FILES)){
+    include __DIR__.'/pop-table.php';
+    $up = new UploadFile();
+    $result = $up -> handleUploadFile($_FILES, $_POST);
+    echo $result;
+
+}
+
+/**
+ * Class UploadFile for handle upload
+ *
+ */
+Class UploadFile{
+
+    private $columns = ['image_url'];
+    private $table = 'migrated_data';
+
+    public function handleUploadFile($files, $post){
+        $file = $files["upload-file"];
+        $imgType = array("png","jpg","jpeg");
+
+        if ($file["error"] == 0) {
+            $typeArr = explode("/", $file["type"]);
+            if($typeArr[0] != "image"){
+                return json_encode([
+                    'error' => 'wrong image type',
+                ]);
+            }
+            if(!in_array($typeArr[1], $imgType)){
+                return json_encode([
+                    'error' => 'wrong image suffix',
+                ]);
+            }
+            if(strlen($file['name'])>200){
+                return json_encode([
+                    'error' => 'image name too long',
+                ]);
+            }
+            if(!isset($post['id']) || empty($post['id'])){
+                return json_encode([
+                    'error' => 'product id can not find',
+                ]);
+            }
+            //filter and save files
+            $file_name = filter_var($file['name'], FILTER_SANITIZE_STRING);
+            $file_name = time().'_'.$file_name;
+            $img_name = "media/".$file_name;
+
+            $data = [
+                'filename' => $file_name,
+                'id' => $post['id'],
+            ];
+            $re = DB::getInstance()->updateImagePathToDatabase($data, $this->columns, $this->table);
+            if($re === 'miss') return json_encode(['message' => 'product does not exist',]);
+            if($re === 'fail') return json_encode(['message' => 'update image url fail',]);
+            //save to
+            $bol = move_uploaded_file($file["tmp_name"], $img_name);
+            if($bol){
+                return json_encode([
+                    'message' => 'success',
+                ]);
+            } else {
+                return json_encode([
+                    'error' => 'fail to upload',
+                ]);
+            };
+
+        }else{
+            return json_encode([
+                "error" => "no files selected"
+            ]);
+        }
+    }
+
+}
+
+
+?>
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+</head>
+
+<body>
+
+    <form method="post" action="/image-uploader.php" enctype="multipart/form-data">
+        <label>upload a file</label>
+        <input type="file" name="upload-file"><br>
+        <label>product id</label>
+        <input type="text" name="id"><br>
+        <input type="submit" value="upload">
+    </form>
+</body>
+
+
+
+</html>

migrate.php

@@ -0,0 +1,137 @@
+<?php
+include __DIR__.'/pop-table.php';
+
+Class Migrate{
+
+    private $link;
+
+    //save instance
+    private static $instance;
+
+    private $original_table = 'original_data';
+    private $migrated_table = 'migrated_data';
+    private $original_columns = [
+        'product_code',
+        'product_label',
+        'gender',
+    ];
+
+    private $transfer_columns = [
+        'sku',
+        'name',
+    ];
+
+    private function __clone(){}
+
+    private function __construct()
+    {
+        $this->link = DB::getInstance()->getLink();
+    }
+
+    /**
+     * @return mixed
+     */
+    public static function getInstance(){
+        if(!self::$instance instanceof self){
+            self::$instance = new Migrate();
+        }
+        return self::$instance;
+    }
+
+    /**
+     * @param bool $init
+     * @return string
+     * main function here
+     */
+    public function run($init=true){
+        //1.get connection
+        $connection = $this->link;
+        if(empty($connection))
+            return json_encode([
+                'message' => 'db connection failed',
+                'code' => '4001'
+            ]);
+
+
+        //2.read data from db
+        $data = $this->readDataFromDb(
+            $this->original_columns,$this->original_table,$connection);
+        if(empty($data)) {
+            return json_encode([
+                'message' => 'fail to read data from original table',
+                'code'=>'4006',
+            ]);
+        }
+
+        //3.clear migrate db
+        if($init === true){
+            $re = DB::getInstance()->clearTable($this->migrated_table);
+            if(!$re) return json_encode([
+                'message' => 'initial table failed',
+                'code' => '4002'
+            ]);
+        }
+        //4.build sql
+        $sql = DB::getInstance()->buildInsertSql($this->transfer_columns, $data, $this->migrated_table);
+        if($sql === false) {
+            return json_encode([
+                'message' => 'fail to build sql',
+                'code' => '4003',
+            ]);
+        }
+        //5.save data in db, run the sql
+        return (mysqli_query($connection,$sql))?
+            json_encode([
+                'message'=> 'success',
+                'code' => '2001'
+            ])
+            :
+            json_encode([
+                'message' => 'fail to insert data',
+                'code'=> '4004',
+            ]);
+    }
+
+
+    /**
+     * @return array
+     * read data from original table
+     */
+    private function readDataFromDb($columns, $table, $link){
+        //build sql
+        $cols = implode(",",$columns);
+        $sql = "SELECT $cols FROM $table";
+        //build return data
+        $return_array = [];
+        $result = mysqli_query($link,$sql);
+
+        if(mysqli_num_rows($result) > 0){
+            $i = 0;//index
+            while($row = mysqli_fetch_assoc($result)){
+                $gender = $row['gender'];
+                $filter_gender = $this->filterGender($gender);
+                $return_array[$i]['sku'] =$filter_gender.'_'.$row['product_code'];
+                $return_array[$i]['name'] = $row['product_label'];
+                $i++;
+            }
+        }
+
+        return $return_array;
+    }
+
+    /**
+     * @param $gender
+     * @return string
+     * process gender
+     */
+    private function filterGender($gender){
+        if(empty($gender)) return 'women';
+        switch (strtoupper($gender)){
+            case 'F': return "women";
+            case 'M': return "men";
+            default: return "women";
+        }
+    }
+}
+
+Migrate::getInstance()->run();