#!/usr/bin/env bash

latest_download () (
    FILTER='import "github" as gh; gh::latest_download(env.OS; env.ARCH)'
    OS=${2} ARCH="${3}" jq --raw-output "${FILTER}" <"$(release_json "${1}")"
)

latest_type () (
    FILTER='import "github" as gh; gh::latest_type(env.OS; env.ARCH)'
    OS=${2} ARCH="${3}" jq --raw-output "${FILTER}" <"$(release_json "${1}")"
)

latest_version () (
    FILTER='import "github" as gh; gh::latest_version'
    jq --raw-output "${FILTER}" <"$(release_json "${1}")"
)

age_in_seconds () (
    echo $(( $(date +"%s") - $(stat -c "%Y" "${1}") ))
)

release_json () (
    DAY=$((60 * 60 * 24))
    PROJECT=$1
    JSON=${XDG_CACHE_HOME}/apps/meta/${PROJECT}/releases.json
    mkdir -p "$(dirname "${JSON}")"
    if [[ ! -f "${JSON}" || "$(age_in_seconds "${JSON}")" -gt "${DAY}" ]]; then
        curl --silent --output "${JSON}" "https://api.github.com/repos/${PROJECT}/releases"
    fi
    echo "${JSON}"
)