#!/bin/bash

# Convert some github URLs to corresponding gitlab mirror URLs.

DIE() {
    local progname="$(basename "$0")"
    echo "==> $progname: error: $1" >&2
    exit 1
}

Github2Gitlab_new() {
    # Get value of variable EOS_FILESERVER_SITE.
    source /etc/eos-script-lib-yad.conf || DIE "init failed."

    local github_url="$1"        # This URL may be converted to gitlab mirror.
    local keep_master=no         # PKGBUILDS repofolder defaults to branch name 'master'.

    # Manage the only option, --keep-master.
    # Note: option should be removed, used only in eos-rankmirrors (?)
    case "$1" in
        --keep-master)
            github_url="$2"
            keep_master=yes
            ;;
    esac

    # Check parameter validity.
    [ -n "$github_url" ] || DIE "no URL!"
    [[ "$github_url" =~ github ]] || DIE "'$github_url' is not a github URL"

    # See which conversions are needed.
    case "$EOS_FILESERVER_SITE" in
        github)
            echo "$github_url"    # If github is selected, URL is already OK.
            ;;
        gitlab)
            # Some repos still use the 'master' branch.
            [[ "$github_url" =~ /endeavouros-team/PKGBUILDS/ ]] && keep_master=yes

            # Start constructing needed conversions.
            local convert_to_gitlab=(
                sed
                -e 's|/endeavouros-team/|/endeavouros-filemirror/|'
                -e 's|/endeavouros-team$|/endeavouros-filemirror|'
            )
            if [[ "$github_url" =~ '//raw.githubusercontent.com/' ]] ; then
                # a few more conversions needed
                convert_to_gitlab+=(
                    -e 's|//raw\.githubusercontent\.com/|//gitlab.com/|'
                    -e 's|/main/|/raw/main/|'
                    -e 's|/calamares/calamares/|/raw/calamares/calamares/|'  # ???
                    -e 's|/blob/|/raw/|'   # ???
                    -e 's|/tree/|/blob/|'  # ???
                )
                case "$keep_master" in
                    yes) convert_to_gitlab+=(-e 's|/master/|/raw/master/|') ;;
                    no)  convert_to_gitlab+=(-e 's|/master/|/raw/main/|') ;;
                esac
            elif [[ "$github_url" =~ '//github.com/' ]] ; then
                # not much more to convert
                convert_to_gitlab+=(
                    -e 's|//github\.com/|//gitlab.com/|'
                )
            fi

            # Now make the conversion.
            echo "$github_url" | "${convert_to_gitlab[@]}"
            ;;
    esac
}

Github2Gitlab() {   # old implementation
    local url
    local keep_master=no

    case "$1" in
        --keep-master) url="$2" ; keep_master=yes ;;
        *) url="$1" ;;
    esac

    source /etc/eos-script-lib-yad.conf

    case "$EOS_FILESERVER_SITE" in
        github)
            echo "$url"
            ;;
        gitlab | *)
            local sed=(sed)
            if [ -n "$(echo "$url" | grep "/raw\.githubusercontent\.com/")" ] ; then
                sed+=(-e 's|/raw\.githubusercontent\.com/|/gitlab.com/|g')
                sed+=(-e 's|/main/|/-/raw/main/|g' )
                if [ "$keep_master" = "yes" ] ; then
                    sed+=(-e 's|/master/|/-/raw/master/|g')
                else
                    sed+=(-e 's|/master/|/-/raw/main/|g')
                fi
                sed+=(-e 's|/endeavouros-team/calamares/|/endeavouros-team/calamares/-/raw/|g' )
                sed+=(-e 's|/install-scripts-next/|/install-scripts-next/-/raw/|g')
            else
                sed+=(-e 's|/github\.com/|/gitlab.com/|g')
            fi
            sed+=(
                -e 's|/endeavouros-team/|/endeavouros-filemirror/|g'
                -e 's|/tree/master/|/-/blob/master/|g'
                -e 's|/blob/master/|/-/blob/master/|g'
                # -e 's|/eos-bash-shared$|/eos-apps-info|' # ???
            )
            echo "$url" | "${sed[@]}"
            ;;
    esac
}

Github2Gitlab "$@"