#!/bin/bash -e
#
# get-latest-series: Download latest patch series from Patchwork
#
# Copyright (C) 2023 BayLibre Inc.
#
# SPDX-License-Identifier: GPL-2.0-only
#

# the interval into the past which we want to check for new series, in minutes
INTERVAL_MINUTES=30

# Maximum number of series to retrieve. the Patchwork API can support up to 250
# at once
SERIES_LIMIT=250

# Location to save patches
DOWNLOAD_PATH="."

# Name of the file to use/check as a log of previously-tested series IDs
SERIES_TEST_LOG=".series_test.log"

# Patchwork project to pull series patches from
PROJECT="oe-core"

# The Patchwork server to pull from
SERVER="https://patchwork.yoctoproject.org/api/1.2/"

help()
{
    echo "Usage: get-latest-series [ -i | --interval MINUTES ]
        [ -d | --directory DIRECTORY ]
        [ -l | --limit COUNT ]
        [ -h | --help ]
        [ -t | --tested-series LOGFILE]
        [ -p | --project PROJECT ]
        [ -s | --server SERVER ]"
    exit 2
}

while [ "$1" != "" ]; do
    case $1 in
        -i|--interval)
        INTERVAL_MINUTES=$2
        shift 2
        ;;
    -l|--limit)
        SERIES_LIMIT=$2
        shift 2
        ;;
    -d|--directory)
        DOWNLOAD_PATH=$2
        shift 2
        ;;
    -p|--project)
        PROJECT=$2
        shift 2
        ;;
    -s|--server)
        SERVER=$2
        shift 2
        ;;
    -t|--tested-series)
        SERIES_TEST_LOG=$2
        shift 2
        ;;
    -h|--help)
            help
        ;;
    *)
        echo "Unknown option $1"
        help
        ;;
    esac
done

# The time this script is running at
START_TIME=$(date --date "now" +"%Y-%m-%dT%H:%M:%S")

# the corresponding timestamp we want to check against for new patch series
SERIES_CHECK_LIMIT=$(date --date "now - ${INTERVAL_MINUTES} minutes" +"%Y-%m-%dT%H:%M:%S")

echo "Start time is $START_TIME"
echo "Series check limit is $SERIES_CHECK_LIMIT"

# Create DOWNLOAD_PATH if it doesn't exist
if [ ! -d "$DOWNLOAD_PATH" ]; then
    mkdir "${DOWNLOAD_PATH}"
fi

# Create SERIES_TEST_LOG if it doesn't exist
if [ ! -f "$SERIES_TEST_LOG" ]; then
    touch "${SERIES_TEST_LOG}"
fi

# Retrieve a list of series IDs from the 'git-pw series list' output. The API
# supports a maximum of 250 results, so make sure we allow that when required
SERIES_LIST=$(git-pw --project "${PROJECT}" --server "${SERVER}" series list --since "${SERIES_CHECK_LIMIT}" --limit "${SERIES_LIMIT}" | awk '{print $2}' | xargs | sed -e 's/[^0-9 ]//g')

if [ -z "$SERIES_LIST" ]; then
    echo "No new series for project ${PROJECT} since ${SERIES_CHECK_LIMIT}"
    exit 0
fi

# Check each series ID
for SERIES in $SERIES_LIST; do
    # Download the series only if it's not found in the SERIES_TEST_LOG
    if ! grep -w --quiet "${SERIES}" "${SERIES_TEST_LOG}"; then
        echo "Downloading $SERIES..."
        git-pw series download --separate "${SERIES}" "${DOWNLOAD_PATH}"
        echo "${SERIES}" >> "${SERIES_TEST_LOG}"
    else
        echo "Already tested ${SERIES}. Skipping..."
    fi
done