Checkpoint: deleting is working

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

buisnesslogic/src/main/java/com/plannaplan/services/ExchangeService.java

@@ -23,8 +23,22 @@ public class ExchangeService {
     public Exchange save(Exchange exchange){
         return this.repo.save(exchange);
     }
-
+ 
+    /** 
+     * @param id Id of exchange in database
+     * @return Optional Exchange if found
+     */
+    public Optional<Exchange> getById(Long id){
+        return this.repo.findById(id);
+    } 
     
+    /** 
+     * @param entity Exchange entity which we would like to delete
+     */
+    public void deleteExchange(Exchange entity){
+        this.repo.delete(entity);
+    }
+
     /** 
      * @param assignment Assignment to trade for
      * @param group Desired group

restservice/src/main/java/com/plannaplan/controllers/ExchangeController.java

@@ -18,6 +18,8 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -79,5 +81,27 @@ public class ExchangeController extends TokenBasedController{
         return new ResponseEntity<>("Success", HttpStatus.OK);
     }
 
+    @DeleteMapping("/exchange/{id}")
+    @ApiOperation(value = "Delete exchange offer")
+    public ResponseEntity<String> deleteExchange(@PathVariable(name = "id", required = false) Long offerId)
+            throws UserNotFoundException {
 
+        final User asker = this.getCurrentUser()
+                                        .orElseThrow(() -> new UserNotFoundException("Invalid token"));
+
+        final Optional<Exchange> exchange = this.exchangeService.getById(offerId);
+        
+        if(exchange.isEmpty()){
+            return new ResponseEntity<>("Given offer does not exist.",  HttpStatus.BAD_REQUEST);
+        }
+
+        final Exchange exchangeToDelete = exchange.get();
+
+        if(!(exchangeToDelete.getOwnedAssignment().getCommision().getCommisionOwner().getId().equals(asker.getId()))){
+            return new ResponseEntity<>("You have not permission for that action.",  HttpStatus.BAD_REQUEST);
+        }
+
+        this.exchangeService.deleteExchange(exchangeToDelete);
+        return new ResponseEntity<>("Success", HttpStatus.OK);
+    }
 }