From 0ae67d029c4bc191f14a2c34ccad2a4c670c23ee Mon Sep 17 00:00:00 2001
From: Kévin Le Gouguec <kevin.legouguec@gmail.com>
Date: Sat, 20 Mar 2021 18:06:41 +0100
Subject: Start analyzing visits

---
 admin/stats/util.py | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 admin/stats/util.py

diff --git a/admin/stats/util.py b/admin/stats/util.py
new file mode 100644
index 0000000..ced69d9
--- /dev/null
+++ b/admin/stats/util.py
@@ -0,0 +1,87 @@
+from dataclasses import dataclass
+from datetime import datetime
+from itertools import groupby
+import re
+from sys import argv
+
+import user_agents
+
+
+ACCESS_RE = re.compile(' '.join((
+    r'(?P<address>\S+)',
+    r'\S+',
+    r'\S+',
+    r'(?P<date>\[\S+ \S+\])',
+    r'"GET (?P<resource>\S+) [^"]+"',
+    r'200 [0-9]+',
+    r'"(?P<referer>[^"]+)"',
+    r'"(?P<useragent>[^"]+)"'
+)))
+
+DATE_FMT = '[%d/%b/%Y:%H:%M:%S %z]'
+
+
+@dataclass
+class Access:
+    address: str
+    useragent: str
+    referer: str
+    time: datetime
+    resource: str
+
+    @classmethod
+    def from_log(cls, info):
+        return cls(
+            info['address'], user_agents.parse(info['useragent']),
+            info['referer'], datetime.strptime(info['date'], DATE_FMT),
+            info['resource']
+        )
+
+def interesting(resource):
+    return (
+        resource.endswith('.html')
+        or resource == '/'
+        or resource.startswith('/?')
+    )
+
+def parse(logs_path):
+    with open(logs_path) as logs_file:
+        logs = logs_file.read().splitlines()
+
+    matches = (ACCESS_RE.match(l) for l in logs)
+    return tuple(
+        Access.from_log(m) for m in matches
+        if m is not None and interesting(m['resource'])
+    )
+
+def key(access):
+    return f'{access.address} / {access.useragent}'
+
+def group(accesses):
+    groups = {}
+    for k, g in groupby(sorted(accesses, key=key), key=key):
+        groups[k] = tuple(
+            (a.time, a.resource, a.referer)
+            for a in g
+        )
+    return groups
+
+def span(visits):
+    return (visits[0][0],
+            visits[-1][0]-visits[0][0])
+
+def dump(logs_path):
+    for k, accesses in group(parse(logs_path)).items():
+        print(k)
+
+        t, duration = span(accesses)
+        print(t, duration)
+
+        for (_, rsrc, ref) in accesses:
+            print(f'{rsrc} {ref}')
+
+        print()
+
+
+if __name__ == '__main__':
+    dump(argv[1])
-- 
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