Add functionality to export all final Markdown translations

[fushar]

After a contest day ends, we want to be able to export the final Markdown translations. One reason is to allow the team leaders to reuse the Notice translation in Day 2. Another reason is for general task archiving purpose.

It is not easy to do this from the UI. As a workaround, @sijie123 came up with a quick script for IOI 2022. The script is posted here as-is for posterity / reference for next years if this functionality is not built yet 😄

two parts: one sql to get the latest version per team per task and dump to csv, and one python3 to take the dumped csv and write into individual files

psql
\c translationdatabase

COPY ( 
    WITH data AS (
        SELECT trans_version.*,trans_task.name,trans_country.code2,trans_user.language_id
        FROM trans_version
        INNER JOIN trans_translation
            ON trans_version.translation_id = trans_translation.id
        INNER JOIN trans_task 
            ON trans_translation.task_id = trans_task.id
        INNER JOIN trans_user
            ON trans_translation.user_id = trans_user.user_ptr_id
        INNER JOIN trans_country 
            ON trans_user.country_id = trans_country.code
    )
    SELECT a.*
    FROM data a
    INNER JOIN (
        SELECT MAX(id) as maxid
        FROM trans_version
        GROUP BY translation_id
    ) AS b ON a.id=b.maxid
) TO '/tmp/test.csv' WITH DELIMITER ',' CSV HEADER;

mkdir -p /tmp/sj
cd /tmp/sj

vim quick.py

import csv
with open('/tmp/test.csv', 'r') as f:
  spamreader = csv.DictReader(f, delimiter=',')
  for row in spamreader:
    with open(f"/tmp/sj/{row['name']}_{row['country_id']}.md", "w") as x:
        x.write(row['text'])

python3 quick.py

[fushar]

An attempt to implement this: ioi-2022#67, feel free for anyone to build on this.

[gollux]

The "refresh" branch adds support for ./manage.py export.

I will close this issue when the branch is merged.