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#!/bin/bash
AK_SCHAINSDIR=$AK_WORKDIR/schains
GENESIS="00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"

_ak_schain_latest_cached(){
    if [ ! -f $AK_WORKDIR/schain.latest ]
    then
        ak-find-latest-mined-sblock > $AK_WORKDIR/schain.latest
    fi
    cat $AK_WORKDIR/schain.latest
}

_ak_schain_tidy(){
    SLATEST=$(ak-find-latest-mined-sblock | jq -r '.latest_block')
    if [ ! -d $AK_SCHAINSDIR ]
    then
        mkdir $AK_SCHAINSDIR
    fi
}

_ak_schain_block_latest_block_hash(){
    ak-find-latest-mined-sblock | jq -r '.latest_block'
}

_ak_schain_crawl(){
    if [ ! -z $1 ] && [ -n "$1" ]
    then
        CUR_TARGET="$1"
    else
        _ak_log_warning "No next target found. So long for $1"
        exit 1
    fi

    if [ $counter -eq 0 ]
    then
        echo '['
        counter=$(($counter + 1))
    else
        _ak_log_info "Counter: $counter, LIMIT_ENABLED: $LIMIT_ENABLED, LIMIT: $LIMIT"
        if [ "$LIMIT_ENABLED" == "yes" ]
        then
            if [ $counter -eq $LIMIT ]
            then
                echo ']'
                exit 0
            fi
        fi
        echo ','
        counter=$(($counter + 1))
    fi

    if [ "$1" == "$GENESIS" ]
    then
        echo '{"genesis":"genesis"}' | jq
        echo ']'
        _ak_log_warning "Looks like genesis. Exiting with 0"
        exit 0
    fi

    if [ ! -f "$AK_MINEDBLOCKSDIR/$CUR_TARGET" ]
    then
        _ak_log_warning "Could not find $CUR_TARGET"
    else
        ( echo -n '{"sblock":"'$1'",' &&
        ak-sblock-show $CUR_TARGET | sed -e 's/^{//g') | jq
        NEXT_TARGET="$(ak-sblock-show $CUR_TARGET | jq -r '.previous')"
        _ak_log_info "Found previous: $NEXT_TARGET"
        _ak_schain_crawl "$NEXT_TARGET"
    fi
}

_ak_schain_crawl_interface(){
    LIMIT_ENABLED="no"
    LIMIT=0
    counter=0
    if [ -z $1 ] || [ ! -n "$1" ]
    then
        _ak_schain_crawl `_ak_schain_block_latest_block_hash`
    else
        while [ "$#" ]; do
            case "$1" in
                -l)
                    LIMIT_ENABLED="yes"
                    LIMIT=$2
                    shift 2
                    ;;
                *)
                    _ak_schain_crawl "$1"
                    ;;
            esac
        done
    fi
}