# commit-converter.py
# 
# This script will convert a git repository's history into a CSV file
# suitable for importing into the `action` table of a Gitea database,
# because Gitea does not show user activity for commits -- only for
# pushes, comments, and that sort of thing.
# 
# Usage:
# git log --date=format:"%Y-%m-%dT%H:%M:%S%z" --pretty="%H|%s|%ae|%an|%ce|%cn|%ct|%cd" | sed 's/00$/:00/g' > /tmp/raw-commits.txt

import json
import csv

with open('/tmp/raw-commits.txt', 'r') as file:
    outfile = open('/tmp/output.csv', 'w')
    writer = csv.writer(outfile, quotechar='"', delimiter=',', quoting=csv.QUOTE_ALL)
    commits = []
    data = []
    i = 5
    for line in file.readlines():
        line = line.strip()
        pline = line.split('|')
        commit = {
            'Sha1': pline[0],
            'Message': pline[1],
            'AuthorEmail': pline[2],
            'AuthorName': pline[3],
            'CommitterEmail': pline[4],
            'CommitterName': pline[5],
            'Timestamp': pline[7]
        }
        
        if 0 == len(commits):
            commits.append(commit)
            continue

        prior_commit = commits[-1]

        commits.append(commit)

        struct = {'Commits': [commit],
                  'HeadCommit': commit,
                  'CompareURL': 'davisr/rcu2/compare/{}...{}'.format(
                      prior_commit['Sha1'], commit['Sha1']),
                  'Len': 1}
    
        je = json.JSONEncoder().encode(struct)
        final = [str(i+1), '1', '5', '1', '3', '0', '0', 'refs/heads/develop', '0', je, pline[6]]
        data.append(final)
        i+=1

    writer.writerows(data)
    outfile.close()