From e16487d087fae33efc3d4adbd21e9e6b1338459b Mon Sep 17 00:00:00 2001
From: Sven Arnold <sven@internetallee.de>
Date: Mon, 8 Feb 2016 18:39:18 +0100
Subject: [PATCH] Books can be lend and returned.

---
 project/books/templates/books/index.html    | 12 +++++++++++-
 project/books/templates/books/lease.html    |  6 ++++++
 project/books/templates/books/returned.html |  3 +++
 project/books/urls.py                       |  4 +++-
 project/books/views.py                      | 25 ++++++++++++++++++++++++-
 5 files changed, 47 insertions(+), 3 deletions(-)
 create mode 100644 project/books/templates/books/lease.html
 create mode 100644 project/books/templates/books/returned.html

diff --git a/project/books/templates/books/index.html b/project/books/templates/books/index.html
index 2b440e1..f1cb109 100644
--- a/project/books/templates/books/index.html
+++ b/project/books/templates/books/index.html
@@ -1,9 +1,19 @@
 {% if book_list %}
 	<ul>
 		{% for book in book_list %}
-		<li>{{ book }}</li>
+		<li>{{ book }} <a href="{% url 'lease_book' book.id %}">Ausleihen</a> <ul>
+			{% for lease in book.lease_set.all %}
+				<li><a href="{% url 'return_book' lease.id %}">{{ lease.leasee }}</a></li>
+			{% endfor %}
+			</ul>
+		</li>
 		{% endfor %}
 	</ul>
 {% else %}
 	Keine Bücher im Regal!
 {% endif %}
+<form action="{% url 'index' %}" method="post">
+	{% csrf_token %}
+	<input type="text" name="title" />
+	<input type="submit" value="Neues Buch" />
+</form>
diff --git a/project/books/templates/books/lease.html b/project/books/templates/books/lease.html
new file mode 100644
index 0000000..bcc905f
--- /dev/null
+++ b/project/books/templates/books/lease.html
@@ -0,0 +1,6 @@
+Leihe {{ book }} an 
+<form action="{% url 'lease_book' book.id %}" method="post">
+	{% csrf_token %}
+	<input type="text" name="leasee" />
+	<input type="submit" value="Verleihe" />
+</form>
diff --git a/project/books/templates/books/returned.html b/project/books/templates/books/returned.html
new file mode 100644
index 0000000..0d3cff3
--- /dev/null
+++ b/project/books/templates/books/returned.html
@@ -0,0 +1,3 @@
+<a href="{% url 'index' %}">
+{{ lease.leasee }} returned {{ lease.book }}.
+</a>
diff --git a/project/books/urls.py b/project/books/urls.py
index a580036..a55716b 100644
--- a/project/books/urls.py
+++ b/project/books/urls.py
@@ -4,5 +4,7 @@ from . import views
 
 urlpatterns = [
 	url(r'^$', views.index, name='index'),
-	url(r'(?P<book_id>\d+)', views.detail, name="detail"),
+	url(r'^(?P<book_id>\d+)$', views.detail, name="detail"),
+	url(r'^(?P<book_id>\d+)/lease$', views.lease_book, name="lease_book"),
+	url(r'^lease/(?P<lease_id>\d+)/return$', views.return_book, name="return_book"),
 ]
diff --git a/project/books/views.py b/project/books/views.py
index 4e57ab8..2a8b689 100644
--- a/project/books/views.py
+++ b/project/books/views.py
@@ -1,9 +1,17 @@
 from django.shortcuts import render
-from django.http import HttpResponse
+from django.core.urlresolvers import reverse
+from django.http import HttpResponse, HttpResponseRedirect
 
 from books.models import Book, Lease
 
 def index(request):
+	try:
+		title = request.POST['title']
+		new_book = Book(title=title)
+		new_book.save()
+		return HttpResponseRedirect(reverse('index'))
+	except KeyError:
+		pass
 	book_list = Book.objects.all()
 	context = { 'book_list': book_list }
 	return render(request, 'books/index.html', context)
@@ -12,3 +20,18 @@ def detail(request, book_id):
 	response = "Book ID: %s"
 	return HttpResponse(response % book_id)
 
+def return_book(request, lease_id):
+	lease = Lease.objects.get(pk = lease_id)
+	lease.delete()
+	return render(request, 'books/returned.html', {'lease': lease})
+
+def lease_book(request, book_id):
+	book = Book.objects.get(pk = book_id)
+	try:
+		leasee = request.POST['leasee']
+		lease = Lease(book = book, leasee = leasee)
+		lease.save()
+		return HttpResponseRedirect(reverse('index'))
+	except KeyError:
+		return render(request, 'books/lease.html', {'book': book})
+
-- 
2.11.0