From a3d15a08380da54996c00a32446a08d0b9c70af4 Mon Sep 17 00:00:00 2001
From: Alexandre Aubin <alexandre.aubin@cern.ch>
Date: Tue, 22 May 2018 22:20:17 +0200
Subject: [PATCH] First version of rss feed for app lists

---
 app/scripts/appListsHistory/rss_template.html |  39 ++++++
 app/scripts/appListsHistory/script.py         | 129 ++++++++++++++++++
 2 files changed, 168 insertions(+)
 create mode 100644 app/scripts/appListsHistory/rss_template.html
 create mode 100644 app/scripts/appListsHistory/script.py

diff --git a/app/scripts/appListsHistory/rss_template.html b/app/scripts/appListsHistory/rss_template.html
new file mode 100644
index 0000000..1bef6a5
--- /dev/null
+++ b/app/scripts/appListsHistory/rss_template.html
@@ -0,0 +1,39 @@
+{% if data.new %}
+<h2>New apps</h2>
+<ul>
+{% for app in data.new %}
+<li><a href="{{ app.url }}">{{ app.name.title() }}</a> 
+    ({{ app.state }}{% if app.level %}, level {{ app.level }}{% endif %}) </li>
+{% endfor %}
+</ul>
+{% endif %}
+
+{% if data.updates %}
+<h2>Apps changes</h2>
+<ul>
+{% for app, changes in data.updates %}
+<li><a href="{{ app.url }}">{{ app.name.title() }}</a>:
+    {% for change in changes %}
+    {% if change == "updated" %}
+        Updated{{ "," if not loop.last }}
+    {% elif change[0] == "state" %}
+        State {{ change[1] }} -&gt; {{ change[2] }}{{ "," if not loop.last }}
+    {% elif change[0] == "level" %}
+        Level {{ change[1] }} -&gt; {{ change[2] }}{{ "," if not loop.last }}
+    {% endif %}
+    {% endfor %}
+</li>
+{% endfor %}
+</ul>
+{% endif %}
+
+{% if data.removed %}
+<h2>Apps removed</h2>
+<ul>
+{% for app in data.removed %}
+<li><a href="{{ app.url }}">{{ app.name.title() }}</a>
+({{ app.state }}{% if app.level %}, level {{ app.level }}{% endif %})
+</li>
+{% endfor %}
+</ul>
+{% endif %}
diff --git a/app/scripts/appListsHistory/script.py b/app/scripts/appListsHistory/script.py
new file mode 100644
index 0000000..5eff8ac
--- /dev/null
+++ b/app/scripts/appListsHistory/script.py
@@ -0,0 +1,129 @@
+
+import json
+import os
+from datetime import datetime
+from feedgen.feed import FeedGenerator
+import jinja2
+
+def _time_points_until_today():
+
+    year = 2017
+    month = 1
+    day = 1
+    today = datetime.today()
+    date = datetime(year, month, day)
+
+    while date < today:
+        yield date
+
+        day += 14
+        if day > 15:
+            day = 1
+            month += 1
+
+        if month > 12:
+            month = 1
+            year += 1
+
+        date = datetime(year, month, day)
+
+time_points_until_today = list(_time_points_until_today())
+
+def get_lists_history():
+
+    os.system("rm -rf ./.work")
+    os.system("git clone https://github.com/YunoHost/apps ./.work/apps")
+
+    for t in time_points_until_today:
+        print(t.strftime("%b %d %Y"))
+
+        # Fetch repo at this date
+        cmd = 'cd ./.work/apps; git checkout `git rev-list -1 --before="%s" master`'
+        os.system(cmd % t.strftime("%b %d %Y"))
+
+        # Merge community and official
+        community = json.loads(open(".work/apps/community.json").read())
+        official = json.loads(open(".work/apps/official.json").read())
+        for key in official:
+            official[key]["state"] = "official"
+        merged = {**community, **official}
+
+        # Save it
+        json.dump(merged, open('./.work/merged_lists.json.%s' % t.strftime("%y-%m-%d"), 'w'))
+
+def diffs():
+
+    # Iterate over pairs of date : (t0,t1), (t1,t2), ...
+    dates = time_points_until_today
+    for d1, d2 in zip(dates[:-1], dates[1:]):
+
+        print("Analyzing %s ... %s" % (d1.strftime("%y-%m-%d"), d2.strftime("%y-%m-%d")))
+
+        # Load corresponding json
+        f1 = json.loads(open("./.work/merged_lists.json.%s" % d1.strftime("%y-%m-%d")).read())
+        f2 = json.loads(open("./.work/merged_lists.json.%s" % d2.strftime("%y-%m-%d")).read())
+
+        for key in f1:
+            f1[key]["name"] = key
+
+        for key in f2:
+            f2[key]["name"] = key
+
+        keys_f1 = set(f1.keys())
+        keys_f2 = set(f2.keys())
+
+        removed = [ f1[k] for k in keys_f1 - keys_f2 ]
+        added   = [ f2[k] for k in keys_f2 - keys_f1 ]
+        keys_inboth  = keys_f1 & keys_f2
+
+        state_changes = []
+        level_changes = []
+        updates = []
+        for key in keys_inboth:
+
+            changes = []
+
+            commit1 = f1[key].get("revision", None)
+            commit2 = f2[key].get("revision", None)
+            if commit1 != commit2:
+                changes.append("updated")
+
+            state1 = f1[key].get("state", None)
+            state2 = f2[key].get("state", None)
+            if state1 != state2:
+                changes.append(("state", state1, state2))
+
+            level1 = f1[key].get("level", None)
+            level2 = f2[key].get("level", None)
+            if level1 != level2:
+                changes.append(("level", level1, level2))
+
+            if changes:
+                updates.append((f2[key], changes))
+
+        yield { "begin": d1,
+                "end": d2,
+                "new": sorted(added, key=lambda a:a["name"]),
+                "removed": sorted(removed, key=lambda a:a["name"]),
+                "updates": sorted(updates, key=lambda a:a[0]["name"]) }
+
+
+def make_rss_feed():
+
+    fg = FeedGenerator()
+    fg.id('https://github.com/YunoHost/Apps/')
+    fg.title('App Lists news')
+    fg.author( {'name':'YunoHost'} )
+    fg.language('en')
+
+    for diff in diffs():
+        fe = fg.add_entry()
+        fe.id(diff["end"].strftime("%y-%m-%d"))
+        fe.title('Changes between %s and %s' % (diff["begin"].strftime("%b %d"), diff["end"].strftime("%b %d")))
+        fe.link(href='https://github.com/YunoHost/apps/commits/master/community.json')
+        fe.content(jinja2.Template(open("rss_template.html").read()).render(data=diff), type="html")
+
+    fg.atom_file('atom.xml')
+
+#get_lists_history()
+make_rss_feed()