From 1a4fd15423e211629aeee5852b581e9a18a645d0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mat=C4=9Bj=20Koci=C3=A1n?= <matej.kocian@gmail.com>
Date: Sat, 4 Feb 2017 23:28:54 +0100
Subject: [PATCH] =?UTF-8?q?Archiv:=20n=C3=A1hledy=20posledn=C3=ADch=20?=
 =?UTF-8?q?=C4=8D=C3=ADsel=20vedle=20ro=C4=8Dn=C3=ADk=C5=AF?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 mamweb/static/css/mamweb.css                | 13 ++++
 seminar/templates/seminar/archiv/cisla.html |  5 +-
 seminar/urls.py                             |  2 +-
 seminar/views.py                            | 82 ++++++++++++++++++++-
 4 files changed, 99 insertions(+), 3 deletions(-)

diff --git a/mamweb/static/css/mamweb.css b/mamweb/static/css/mamweb.css
index 0d23829f..6e5b9488 100644
--- a/mamweb/static/css/mamweb.css
+++ b/mamweb/static/css/mamweb.css
@@ -685,3 +685,16 @@ div.novinka_obrazek {
 div.org-text {
     font-style: italic;
 }
+
+div.nahledy_cisel {
+    float: right;
+    height: 297px;
+    width: 420px;
+    position: relative;
+    margin-right: 10%;
+    margin-bottom: 50px;
+}
+
+div.nahledy_cisel div, div.nahledy_cisel img {
+    position: absolute;
+}
diff --git a/seminar/templates/seminar/archiv/cisla.html b/seminar/templates/seminar/archiv/cisla.html
index c5449467..07833aa4 100644
--- a/seminar/templates/seminar/archiv/cisla.html
+++ b/seminar/templates/seminar/archiv/cisla.html
@@ -8,6 +8,10 @@
     {% endblock %}{% endblock %}
   </h2>
 
+  <div class='nahledy_cisel'>
+    {% autoescape off %}{{ nahledy }}{% endautoescape %}
+  </div>
+
   <ul>
     {% for r in object_list %}
     <li><a href='{{ r.verejne_url }}'>Ročník {{ r }}</a>
@@ -16,7 +20,6 @@
     {% endfor %}
   </ul>
 
-
 </div>
 {% endblock content %}
 
diff --git a/seminar/urls.py b/seminar/urls.py
index de5b10d6..16c8799b 100644
--- a/seminar/urls.py
+++ b/seminar/urls.py
@@ -16,7 +16,7 @@ urlpatterns = [
     url(r'^co-je-MaM/organizatori/organizovali/$', views.CojemamOrganizatoriStariView.as_view(), name='stari_organizatori'),
 
     # Archiv
-    url(r'^archiv/cisla/$', views.CislaView.as_view()),
+    url(r'^archiv/cisla/$', views.ArchivView.as_view()),
     url(r'^archiv/temata/$', views.ArchivTemataView.as_view()),
 
     url(r'^rocnik/(?P<rocnik>\d+)/$', views.RocnikView.as_view(), name='seminar_rocnik'),
diff --git a/seminar/views.py b/seminar/views.py
index d70ef712..4c18c2fe 100644
--- a/seminar/views.py
+++ b/seminar/views.py
@@ -22,6 +22,7 @@ import tempfile
 import subprocess
 import shutil
 import os
+import os.path as op
 from django.conf import settings
 import unicodedata
 import json
@@ -167,10 +168,89 @@ class CojemamOrganizatoriStariView(generic.ListView):
 
 ### Archiv
 
-class CislaView(generic.ListView):
+
+class ArchivView(generic.ListView):
     model = Rocnik
     template_name='seminar/archiv/cisla.html'
 
+    def get_context_data(self, **kwargs):
+        context = super(ArchivView, self).get_context_data(**kwargs)
+
+        vyska = 297  # px
+        sirka = 210  # px
+
+        cisla = Cislo.objects.filter(verejne_db=True)[:10]
+
+        png_dir = op.join(settings.MEDIA_ROOT, "cislo", "png")
+
+        # seznam [(url obrázku, číslo)]
+        urls = []
+
+        for i, c in enumerate(cisla):
+            if not c.pdf:
+                continue
+            filename = os.path.split(c.pdf.file.name)[1].split(".")[0]
+            png_filename = "{}-{}px.png".format(filename, vyska)
+
+            # Pokud obrázek neexistuje nebo není aktuální, vytvoř jej
+            png_path = op.join(png_dir, png_filename)
+            if not op.exists(png_path) or \
+                    op.getmtime(png_path) < op.getmtime(c.pdf.path):
+
+                subprocess.call([
+                    "convert",
+                    "-density", "180x180",
+                    "-geometry", "{}x{}".format(vyska, vyska),
+                    "-background", "white",
+                    "-flatten",
+                    "-rotate", str(90 * i),
+                    "{}[0]".format(c.pdf.path),  # titulní strana
+                    png_path
+                ])
+
+            urls.append(
+                (op.join(settings.MEDIA_URL, "cislo", "png", png_filename), c)
+            )
+            vyska, sirka = sirka, vyska / 2
+
+        tags = []
+
+        def spirala(urls, tags, idx):
+            """Rekurzivně prochází urls a generuje strom elementů do tags"""
+            if idx >= len(urls):
+                return
+
+            img_url, cislo = urls[idx]
+            tags.append(
+                "<div style='top:{}%;left:{}%;width:{}%;height:{}%;'>"
+                .format(
+                    50 if idx % 4 == 2 else 0,
+                    50 if idx % 4 == 1 else 0,
+                    50 if idx % 2 == 1 else 100,
+                    50 if idx > 0 and idx % 2 == 0 else 100
+                )
+            )
+            tags.append("<a href='{}' title='{}'>".format(
+                cislo.verejne_url(), cislo.kod()
+            ))
+            tags.append(
+                "<img src='{}' style='top:{}%;left:{}%;width:{}%;height:{}%;'>"
+                .format(
+                    img_url,
+                    50 if idx % 4 == 3 else 0,
+                    50 if idx % 4 == 2 else 0,
+                    50 if idx % 2 == 0 else 100,
+                    50 if idx % 2 == 1 else 100
+                )
+            )
+            tags.append("</a>")
+            spirala(urls, tags, idx + 1)
+            tags.append("</div>")
+        spirala(urls, tags, 0)
+
+        context["nahledy"] = "\n".join(tags)
+        return context
+
 
 def sloupec_s_poradim(vysledky):
     # počet řešitelů ve výsledkovce nad aktuálním