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Filename : CourseController.php
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<?php

namespace App\Http\Controllers\Admin;
use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Models\User;
use App\Models\Group;
use App\Models\ProductCategory;
use App\Models\Course;
use Auth;
use Hash;
use Session;
use DB;
use Socialite;
use Image;
Use Response;
use Helpers;
//use Illuminate\Foundation\Auth\AuthenticatesUsers;
//use Mail;


class CourseController extends Controller
{
    public function index()
    {
        $courses = Course::all();
        return view('Admin.Course.index',compact('courses'));
    }

    public function course_list(Request $request)
    {
        $columns = array("course_name","course_id");
        $columns2 =array("courses.course_name","courses.course_id");
     

        $totalData = Course::count();
        $limit = $request->input('length');
        $start = $request->input('start');
        
        $dir   = $request->input('order.0.dir');
            
        $query = Course::select($columns2);
       
        $courses = $query->get();
        $totalFiltered = $courses->count();

        $courses = $query->offset($start);
        $courses = $query->limit($limit);
        if(isset($columns2[$request->input('order.0.column')])){
            $order = $columns[$request->input('order.0.column')];
            $courses = $query->orderBy($order,$dir);
        }
        if(isset($request->sort_by) && $request->sort_by == 1)
            $courses = $query->orderBy('courses.created_at', 'asc');
        else
            $courses = $query->orderBy('courses.created_at', 'desc');
        
        $courses = $query->get();

        //$totalFiltered = $query->count();

        $data = array();
        if(!empty($courses)) {
            foreach ($courses as $key => $course) {
                $edit   = route('courses.edit',$course->course_id);
                $delete = route('courses.destroy', $course->course_id);

                foreach ($columns as $key => $column) {
                    
                    if ($column == 'course_id') {
                        $nestedData[$column] = "<form action='{$delete}' method='POST' 
                                                    id='courseTable-".$course->$column."'>
                                                    <input name='_method' type='hidden' value='DELETE'>
                                                    <a href='{$edit}' title='EDIT' class='mb-6 btn-floating waves-effect waves-light gradient-45deg-green-teal gradient-shadow'>
                                                    ".csrf_field()."
                                                    <i class='material-icons'>edit</i></a>
                                                    <button type='button' title='DELETE' class='mb-6 btn-floating waves-effect waves-light gradient-45deg-purple-deep-orange gradient-shadow' onclick='delete_course(".$course->$column.");'>
                                                        <i class='material-icons'>clear</i>
                                                    </button>
                                                </form>";   
                    }
                   
                    else if($column == 'created_at') {
                         $nestedData[$column] = date('j M Y h:i a',strtotime($course->$column));
                    }
                    else {
                        $nestedData[$column] = $course->$column;
                    }
                }
                $data[] = $nestedData;
            }
        }
        //echo count($data);exit;
          
        $json_data = array(
                    "draw"            => intval($request->input('draw')),  
                    "recordsTotal"    => intval($totalData),  
                    "recordsFiltered" => intval($totalFiltered), 
                    "data"            => $data   
                    );
        // echo '<pre>';print_r($json_data);die;    
        echo json_encode($json_data);
    }
    
    public function create()
    {
        $courses = Course::get();
        return view('Admin.Course.create',compact('courses'));
    }

    public function store(Request $request)
    {
        $validate = $request->validate([
            'course_name' => 'required'
        ]);

        Course::create($request->all());

        return redirect()->route('courses.index')->with('success','Record Successfully Inserted.');
    }

    public function edit($id)
    {
        $courses = Course::find($id);
        
        return view('Admin.Course.edit',compact('courses'));
    }
    
    public function update(Request $request,$id)
    {   
        $validate = $request->validate([
            'course_name' => 'required',
        ]); 

        $courses = Course::find($id);   

        $courses->update($request->all());

        return redirect()->route('courses.index')->with('success','Record Updated Successfully.');
    }

    public function destroy($id)
    {
        $data = Course::find($id)->delete();
       
        return redirect()->route('courses.index')->with('success','Record Deleted Successfully');
    }
}