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<?php
 
namespace App\Http\Controllers;
 
use Illuminate\Http\Request; 
use Illuminate\Support\Facades\Validator;  						
use Illuminate\Support\Facades\DB;  
 
use App\Models\ClasswiseSubject;    
use App\Models\SessionMaster;      
use App\Models\Employee;   
use Helper;   		       		  							 
 
class TeacherSubjectController extends Controller						
{  
	public function __construct()
    {
       DB::statement("SET SQL_MODE=''"); 			
    }  
	
	public function index(Request $request) 
    {	
		$search = $request->search;			
		$limit = $request->limit;
		$page = $request->page;
		$order = $request->order;
		$order_by = $request->orderBy;			
		
		$offset = ($page-1)*$limit;    
		
		$query = Employee::leftjoin("class_master as cl",DB::raw('FIND_IN_SET(cl.classId,employees.class_set)'),">",DB::raw("'0'"))->leftjoin("course_master as cm",DB::raw('FIND_IN_SET(cm.courseId,cl.courseId)'),">",DB::raw("'0'")) 
		->leftjoin("section_master as sm",DB::raw('FIND_IN_SET(sm.sectionId,employees.section_set)'),">",DB::raw("'0'"))
		->selectRaw("count(DISTINCT employees.id) as row_count");  

		if($search !='')	
		{ 	   
			$query->where(function($q) use ($search) {
				 $q->where('employees.emp_name', 'like', '%'.$search.'%') 	
				   ->orWhere('employees.emp_no', 'like', '%'.$search.'%');     	
				   //->orWhere('cm.courseName', 'like', '%'.$search.'%');  				   	
			});   	   				   
		} 		
		   				
		$records = $query->where('employees.status',1)->get();  	
		
		$emp_query = Employee::leftJoin('emp_subjects as es','employees.id','=','es.emp_id')
		->leftJoin("class_wise_sub_desc as cw",function($join){
            $join->on("cw.csId","=","es.cs_id")
                ->on("cw.subjectId","=","sb.subjectId");
        })
		->leftjoin("course_master as cm",DB::raw('FIND_IN_SET(sb.subjectId,es.sub_id)'),">",DB::raw("'0'")) 
		->leftjoin("class_master as cl",DB::raw('FIND_IN_SET(cl.classId,employees.class_set)'),">",DB::raw("'0'"))
		->leftjoin("course_master as cm",DB::raw('FIND_IN_SET(cm.courseId,cl.courseId)'),">",DB::raw("'0'")) 
		->leftjoin("section_master as sm",DB::raw('FIND_IN_SET(sm.sectionId,employees.section_set)'),">",DB::raw("'0'"))	
		->selectRaw("employees.id,employees.emp_name,employees.emp_no,GROUP_CONCAT(DISTINCT IFNULL(cl.className,'N/A')) as class_list,GROUP_CONCAT(DISTINCT IFNULL(cm.courseName,'N/A')) as course_list,GROUP_CONCAT(DISTINCT IFNULL(sm.sectionName,'N/A')) as section_list,IFNULL(group_concat(DISTINCT concat(sb.subjectName,':',cw.id)),'N/A') as sub_list,IFNULL(group_concat(DISTINCT concat(CASE WHEN cw.compulsary = 1 THEN 'comp' WHEN cw.elective = 1 THEN 'elec' WHEN cw.addition = 1 THEN 'ado' ELSE 'N/A' END,':',cw.id )),'N/A') AS sub_type");    

		if($search !='')	
		{ 
			$emp_query->where(function($q) use ($search) {
				 $q->where('employees.emp_name', 'like', '%'.$search.'%') 	
				   ->orWhere('employees.emp_no', 'like', '%'.$search.'%');   	  
				   //->orWhere('cm.courseName', 'like', '%'.$search.'%');  				   	
			});   	   	   				   
		}
		if($order_by !='')	
		{
			$emp_query->orderBy($order_by,$order); 	  	  		
		}	

		$emp_query->where('employees.status',1);   			
		$employees = $emp_query->groupBy('employees.id')->offset($offset)->limit($limit)->get();   
		
		$collection = $employees->map(function ($item) {
			
		$record=Employee::leftJoin('emp_subjects as es','employees.id','=','es.emp_id')
			->selectRaw("GROUP_CONCAT(DISTINCT IFNULL(es.cs_id,'N/A')) as sub_set")
			->where('emp_id',$item->id)
            ->get();  

		  $item['test'] = $record[0]->sub_set;  
		  return $item;		  
});
		
        if(count($employees) > 0) 		
		{
			$response_arr = array('data'=>$collection,'total'=>$records[0]->row_count);			
            return response()->json(["status" => "successed", "success" => true,"data" => $response_arr]);			
        }
        else {
			$response_arr = array('data'=>[],'total'=>0);	
            return response()->json(["status" => "failed", "success" => false, "message" => "Whoops! no record found","data" => $response_arr]);		
        }	
		
    } 
	
	public function add(Request $request)	  		
	{
		$inputs=$request->all();  
		$lists=$request->sub_set;  

		$id_arr=$class_arr=$section_arr=[];  	
		
		foreach($lists AS $k=>$v)
		{
			array_push($id_arr,$k);  			
		}
		
		$classwise=ClasswiseSubject::whereIn('id',$id_arr)->get();		
		
		foreach($classwise AS $cw)
		{
			if(!in_array($cw->classId,$class_arr))
			{
				array_push($class_arr,(int)$cw->classId);		
			}
			
			if(!in_array($cw->sectionId,$section_arr))
			{
				array_push($section_arr,(int)$cw->sectionId);		
			}
		}	  							
		
		$rules=[ 
			'employee_name' => 'required', 
			'employee_no' => 'required|unique:employees,emp_no', 	
			'date_join' => 'required|date',	 
			'email'	=>'required|email|unique:employees',		
			'mobile' =>'required',  
		];   
		
		$fields = [       
			'employee_name' => 'Employee Name',	  
			'employee_no' => 'Employee No.',	 	
			'date_join' => 'Date of Joning',
			'email' => 'Email ID',	  
			'mobile' => 'Mobile No.',	  	
		]; 

		$messages = [
			'required' => 'The :attribute field is required.',    
		];  	
		
		$validator = Validator::make($inputs, $rules, $messages, $fields);   	    		
 
        if ($validator->fails()) {  	
			$errors=$validator->errors();      			  
			$response_arr=array("status"=>"failed","message"=>"Please fill required fields!!","errors"=>$errors);     
        }
		else if(count($id_arr)==0)		
		{ 					  
			$response_arr=array("status"=>"failed","message"=>"Please Select Subject","errors"=>"");     
		}
		else
		{ 	
			$fiscal_yr=Helper::getFiscalYear(date('m'));  
			$fiscal_arr=explode(':',$fiscal_yr);	
			$fiscalYear=SessionMaster::where('session_start',$fiscal_arr[0])->where('session_end',$fiscal_arr[1])->get();
			$fiscal_id=(count($fiscalYear)>0)?$fiscalYear[0]->id:0; 
			
			$school_id=empty($request->school_id)?0:$request->school_id;      
			
			$insert_arr = array(
				'emp_name' => $request->employee_name, 			
				'emp_no' => $request->employee_no, 	
				'doj' => $request->date_join, 	
				'email' => $request->email, 	
				'mobile' => $request->mobile,  				
				'class_set' => implode(',',$class_arr),   
				'section_set' => implode(',',$section_arr), 		
				'subject_set'=>json_encode($lists),  	
				'session_id' => $fiscal_id,	 
				'school_id' =>$school_id,		    			 	
				'status' =>1,  
			);   			
			
			$emp = Employee::create($insert_arr);				
			
			if($emp->id)		
			{ 	
				$message="Details saved successfully";
				$response_arr=array("status"=>'successed',"success"=>true,"message"=>$message,"errors"=>[],"data"=>$emp);	 
			}
			else
			{
				$message="could not saved!!";  
				$response_arr=array("status"=>'failed',"success"=>false,"message"=>$message,"errors"=>[],"data"=>[]);	
			} 		
      		
		}			
		return response()->json($response_arr);								
	}	

	public function edit($id)		
	{ 		
		$info = Employee::leftjoin("class_master as cl",DB::raw('FIND_IN_SET(cl.classId,employees.class_set)'),">",DB::raw(        "'0'"))->leftjoin("course_master as cm",DB::raw('FIND_IN_SET(cm.courseId,cl.courseId)'),">",DB::raw("'0'")) 
				->leftjoin("section_master as sm",DB::raw('FIND_IN_SET(sm.sectionId,employees.section_set)'),">",DB::raw("'0'"))->selectRaw("count(*) as row_count")				
				->where('employees.status',1)
				->where('employees.id',$id)    
				->get();  				

		if($info[0]->row_count > 0)  	
		{ 
			 $record = Employee::leftjoin("class_master as cl",DB::raw('FIND_IN_SET(cl.classId,employees.class_set)'),">",DB::raw("'0'"))->leftjoin("course_master as cm",DB::raw('FIND_IN_SET(cm.courseId,cl.courseId)'),">",DB::raw("'0'")) 
			->leftjoin("section_master as sm",DB::raw('FIND_IN_SET(sm.sectionId,employees.section_set)'),">",DB::raw("'0'"))
			->selectRaw("employees.id,employees.emp_name,employees.emp_no,employees.doj,employees.email,employees.mobile,GROUP_CONCAT(DISTINCT IFNULL(cl.classId,'N/A')) as class_list,GROUP_CONCAT(DISTINCT IFNULL(cm.courseId,'N/A')) as course_list,GROUP_CONCAT(DISTINCT IFNULL(sm.sectionId,'N/A')) as section_list") 			
			->where('employees.status',1)
			->where('employees.id',$id)      
			->get();  		  			

			$response_arr = array("status" => "successed", "success" => true, "message" => "Assigned Class record found","data" =>$record);  					
        }
        else {
			$response_arr = array("status" => "failed", "success" => false, "message" => "Whoops! no record found","data" =>[]);	         		
        }			

		return response()->json($response_arr);							
	}	
	
   public function update(Request $request,$id)    
   {
	   $inputs=$request->all();
	   $class_arr=empty($request->class_list)?[]:explode(',',$request->class_list);  	  	
	   $info = Employee::where('id',$id)->get();    
   
	   if(count($info)>0)
	   {
		    $num_rule=($info[0]->emp_no==$request->employee_no)?'required':'required|unique:employees,emp_no';     
			$email_rule=($info[0]->email==$request->email)?'required':'required|email|unique:employees';   
		   
			$rules=[ 
				'employee_name' =>'required', 
				'employee_no' =>$num_rule, 	
				'date_join' =>'required|date',	 
				'email'	=>$email_rule,		
				'mobile' =>'required',  
			];   
			
			$fields = [       
				'employee_name' => 'Employee Name',	  
				'employee_no' => 'Employee No.',	 	
				'date_join' => 'Date of Joning',
				'email' => 'Email ID',	  
				'mobile' => 'Mobile No.',	  	
			]; 
			
			$messages = array('required'=>'The :attribute field is required.');
		
			$validator = Validator::make($inputs,$rules,$messages,$fields);		   

			if ($validator->fails()) {
				$errors=$validator->errors();
				$response_arr=array("status"=>"failed","success"=>false,"message"=>"Please fill required fields!!","errors"=>$errors);		
			}
			else if(count($class_arr)==0)
			{ 					  
				$response_arr=array("status"=>"failed","message"=>"Please Select Course","errors"=>"");     
			}  
			else
			{ 	 
				$update_arr=array( 					
					'emp_name' => $request->employee_name, 	
					'emp_no' => $request->employee_no, 	
					'doj' => $request->date_join, 	
					'email' => $request->email, 	
					'mobile' => $request->mobile,  				
					'class_set' => $request->class_list,   
					'section_set' => $request->section_list,    
				);   				
				
				$update=Employee::where('id',$id)->update($update_arr);    

				if($update)
				{
					$message="Details updated successfully";
					$response_arr=array("status"=>'successed',"success"=>true,"errors"=>[],"message"=>$message,"data" =>$update);  
				}
				else
				{
					$message="could not update!!";		  
					$response_arr=array("status"=>'failed',"success"=>false,"errors"=>[],"message"=>$message,"data"=>[]);
				}
			}  	
		}
		else
		{
			$response_arr = array("status" => "failed", "success" => false, "message" => "Whoops! no record found","data" =>[]);	 
		}			
	     
	   return response()->json($response_arr);   
	   
   }
   
}