Issue #72: Add method to get form answers number

closes #72 (closed)

Signed-off-by: Richard Heise rfhf19@inf.ufpr.br

src/api/controllers/form.ts

@@ -26,6 +26,7 @@ import { Form, FormOptions} from "../../core/form";
 import { FormUpdate, FormUpdateOptions } from "../../core/formUpdate";
 import { Response, NextFunction } from "express";
 import { Request } from "../apiTypes";
+import { FormAnswer, FormAnswerOptions } from "../../core/formAnswer";
 
 export class FormCtrl {
 
@@ -166,4 +167,35 @@ export class FormCtrl {
             return;
         });
     }
+
+    public static answerNumber(req: Request, res: Response, next: NextFunction) {
+
+        waterfall([
+            (callback: (err: Error, answer?: FormAnswer[]) => void) => {
+                req.db.answer.readAll(req.params.id, (err: Error, resultAnswer?: FormAnswer[]) => {
+                    if (err) {
+                        callback(err);
+                        return;
+                    }
+
+                    let sum: number = 0;
+                    for (const forms of resultAnswer) {
+                        sum += Object.keys(forms.inputAnswers).length
+                    }
+
+                    res.status(200).json({
+                        answerNumber: sum
+                    });
+                });
+            }
+        ], (error: Error) => {
+            if (error) {
+                res.status(500).json({
+                    message: "Some error has ocurred. Check error property for details.",
+                    error: error.message
+                });
+                return;
+            }
+        });
+    }
 }