created new sprint form component draft

src/app/sprint-form/sprint-form.component.css

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+.modal-footer {
+	border-top: 0px solid;
+	padding-top: 5%;
+}

src/app/sprint-form/sprint-form.component.html

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+    <div class="modal-content p-3">
+    <div class="modal-header">
+        <h4 class="modal-title">Neuen Sprint anlegen</h4>
+        <button (click)="onClose()" type="button" class="close" aria-label="Close">
+            <span aria-hidden="true">&times;</span>
+        </button>
+    </div>
+    <div class="modal-body">
+        <form (ngSubmit)="onSubmit()">
+            <div class="form-group">
+                <label for="Title">Titel</label>
+                <input type="text" class="form-control" id="Title" required name="title" [(ngModel)]="sprint.title"
+                    id="titleField">
+            </div>
+            <div class="form-group">
+                <label for="Title">Startdatum</label>
+                <input type="date" class="form-control" id="Title" required name="title" [(ngModel)]="sprint.startDate"
+                    id="titleField">
+            </div>
+            <div class="form-group">
+                <label for="Title">Enddatum</label>
+                <input type="date" class="form-control" id="Title" required name="title" [(ngModel)]="sprint.endDate"
+                    id="titleField">
+            </div>
+            
+            <div class="modal-footer">
+                <button (click)="onClose()" type="dismiss" class="btn btn-secondary"
+                    data-dismiss="modal">Abbrechen</button>
+                <button type="submit" class="btn btn-primary">Sprint starten</button>
+            </div>
+        </form>
+    </div>
+</div>

src/app/sprint-form/sprint-form.component.ts

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+import { Component, OnInit, Input } from '@angular/core';
+import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
+import {
+  BackendService,
+  ScrumTask,
+  Priority,
+  ScrumStatus,
+  ScrumCategory,
+  ScrumUser,
+  ScrumProject,
+  ScrumUserstory,
+  ScrumSprint
+} from '../services/backend.service';
+import { Observable } from 'rxjs';
+import { HttpResponse } from '@angular/common/http';
+
+@Component({
+  selector: 'app-task-form',
+  templateUrl: './sprint-form.component.html',
+  styleUrls: ['./sprint-form.component.css'],
+})
+export class SprintFormComponent implements OnInit {
+  @Input() public sprint: ScrumSprint;
+  public editing: Boolean;
+  public sprintid: string;
+
+  constructor(
+    private backendService: BackendService,
+    private activeModalService: NgbActiveModal
+  ) { }
+
+  ngOnInit(): void {
+    if (this.sprint === null || this.sprint === undefined) {
+      this.sprint = { title: '', startDate: new Date(), endDate: new Date(), project: 0 }; //project id: static counter?
+      this.editing = false;
+    } else {
+      this.editing = true;
+    }
+    document.getElementById('titleField').focus();
+  }
+
+  onSubmit() {
+    if (this.editing) {
+      this.backendService.putSprint(this.sprint).subscribe((response) => {
+        if (response.status > 399) {
+          alert('Fehler');
+        }
+      });
+    } else {
+      this.backendService.postSprint(this.sprint).subscribe((response) => {
+        if (response.status > 399) {
+          alert('Fehler');
+        }
+      });
+    }
+    this.activeModalService.close(this.sprint);
+  }
+
+  onClose() {
+    this.activeModalService.dismiss(this.sprint);
+  }
+}