Add missing downloads app

.gitignore

@@ -12,7 +12,6 @@ env/
 build/
 develop-eggs/
 dist/
-downloads/
 eggs/
 .eggs/
 lib/

downloads/admin.py

@@ -0,0 +1,12 @@
+from django.contrib import admin
+from .models import Download, Platform, Version
+
+# Register your models here.
+
+class VersionAdmin(admin.ModelAdmin):
+    list_display = ('download', 'platform', 'version', 'latest', 'available')
+    list_filter = ('download__name', 'platform__name', 'latest', 'available')
+
+admin.site.register(Download)
+admin.site.register(Platform)
+admin.site.register(Version, VersionAdmin)

downloads/apps.py

@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class DownloadsConfig(AppConfig):
+    name = 'downloads'

downloads/migrations/0001_initial.py

@@ -0,0 +1,43 @@
+# Generated by Django 2.2.1 on 2019-05-14 15:09
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Download',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('slug', models.SlugField()),
+                ('name', models.CharField(max_length=100)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Platform',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('slug', models.SlugField()),
+                ('name', models.CharField(max_length=100)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Version',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('version', models.CharField(max_length=50)),
+                ('latest', models.BooleanField(blank=True, default=False)),
+                ('available', models.BooleanField(blank=True, default=True)),
+                ('url', models.URLField()),
+                ('download', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='downloads.Download')),
+                ('platform', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='downloads.Platform')),
+            ],
+        ),
+    ]

downloads/models.py

@@ -0,0 +1,65 @@
+from django.db import models
+
+
+class Platform(models.Model):
+    slug = models.SlugField()
+    name = models.CharField(max_length=100)
+
+    def __str__(self):
+        return self.name
+
+
+class Download(models.Model):
+    slug = models.SlugField()
+    name = models.CharField(max_length=100)
+
+    def __str__(self):
+        return self.name
+
+
+class VersionManager(models.Manager):
+    def get_latest(self, download, platform):
+        if isinstance(download, str):
+            try:
+                download = Download.objects.get(slug=download)
+            except Download.DoesNotExist:
+                return None
+
+        if isinstance(platform, str):
+            try:
+                platform = Platform.objects.get(slug=platform)
+            except Platform.DoesNotExist:
+                return None
+
+        latest = (Version.objects
+                  .filter(platform=platform, download=download)
+                  .filter(available=True)
+                  .order_by('-latest', '-id')
+                  .first())
+        if not latest:
+            return None
+
+        return latest
+
+class Version(models.Model):
+    download = models.ForeignKey(Download, on_delete=models.CASCADE, db_index=True)
+    platform = models.ForeignKey(Platform, on_delete=models.CASCADE, db_index=True)
+    version = models.CharField(max_length=50)
+    latest = models.BooleanField(default=False, blank=True)
+    available = models.BooleanField(default=True, blank=True)
+    url = models.URLField()
+
+    objects = VersionManager()
+
+    def save(self, *args, **kwargs):
+        if self.latest:
+            # Unmark as latest any other version for this download/platform
+            latest = Version.objects.filter(platform=self.platform, download=self.download, latest=True)
+            for k in latest:
+                k.latest = False
+                k.save()
+
+        super().save(*args, **kwargs)
+
+    def __str__(self):
+        return "%s v%s for %s" % (self.download, self.version, self.platform)

downloads/templatetags/dltags.py

@@ -0,0 +1,21 @@
+from django import template
+from django.utils.html import format_html
+from downloads.models import Version, Platform
+from django.utils.translation import ugettext as _
+
+register = template.Library()
+
+BUTTON_HTML = """
+<a class="pure-button pure-button-primary download-button" href="{url}">{title}</a>
+[(sig)]({url}.asc)
+"""
+
+@register.simple_tag
+def download_button(download, platform):
+    latest = Version.objects.get_latest(download, platform)
+    if not latest:
+        return format_html("\ufffc")
+
+    title = _("Download {} v{}").format(latest.download, latest.version)
+    return format_html(BUTTON_HTML.strip(), url=latest.url, title=title)
+

downloads/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

downloads/views.py

@@ -0,0 +1,3 @@
+from django.shortcuts import render
+
+# Create your views here.