tof-voters: add review analysis subcommand

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Icc571370c3fa961518948b9b63e5d7359963289b
diff --git a/tof-voters/libvoters/subcmd/analyze-reviews.py b/tof-voters/libvoters/subcmd/analyze-reviews.py
new file mode 100644
index 0000000..b3734b9
--- /dev/null
+++ b/tof-voters/libvoters/subcmd/analyze-reviews.py
@@ -0,0 +1,89 @@
+#!/usr/bin/python3
+
+import argparse
+import json
+import os
+import re
+import libvoters.acceptable as acceptable
+from collections import defaultdict
+from libvoters.time import timestamp, TimeOfDay
+from typing import Dict
+
+
+class subcmd:
+    def __init__(self, parser: argparse._SubParsersAction) -> None:
+        p = parser.add_parser(
+            "analyze-reviews", help="Determine points for reviews"
+        )
+
+        p.add_argument(
+            "--before",
+            "-b",
+            help="Before timestamp (YYYY-MM-DD)",
+            required=True,
+        )
+        p.add_argument(
+            "--after",
+            "-a",
+            help="After timestamp (YYYY-MM-DD)",
+            required=True,
+        )
+
+        p.set_defaults(cmd=self)
+
+    def run(self, args: argparse.Namespace) -> int:
+        before = timestamp(args.before, TimeOfDay.AM)
+        after = timestamp(args.after, TimeOfDay.PM)
+
+        changes_per_user: Dict[str, list[int]] = defaultdict(list)
+
+        for f in sorted(os.listdir(args.dir)):
+            path = os.path.join(args.dir, f)
+            if not os.path.isfile(path):
+                continue
+
+            if not re.match("[0-9]*\.json", f):
+                continue
+
+            with open(path, "r") as file:
+                data = json.load(file)
+
+            project = data["project"]
+            id_number = data["number"]
+            author = data["owner"]["username"]
+
+            if not acceptable.project(project):
+                print("Rejected project:", project, id_number)
+
+            comments_per_user: Dict[str, int] = defaultdict(int)
+
+            for patch_set in data["patchSets"]:
+                created_on = data["createdOn"]
+
+                if created_on > before or created_on < after:
+                    continue
+
+                if "comments" not in patch_set:
+                    continue
+
+                for comment in patch_set["comments"]:
+                    reviewer = comment["reviewer"]["username"]
+
+                    if reviewer == author:
+                        continue
+                    if not acceptable.file(project, comment["file"]):
+                        continue
+
+                    comments_per_user[reviewer] += 1
+
+            print(project, id_number)
+            for (user, count) in comments_per_user.items():
+                if count < 3:
+                    continue
+                print("    ", user, count)
+                changes_per_user[user].append(id_number)
+
+        with open(os.path.join(args.dir, "reviews.json"), "w") as outfile:
+            outfile.write(json.dumps(changes_per_user, indent=4))
+
+        return 0