fn get_lib_file {
    if(! ~ $#sitedir 0 && test -f $sitedir/_werc/lib/$1)
        echo -n $sitedir/_werc/lib/$1
    if not if(! ~ $#masterSite 0 && test -f $sitesdir/$masterSite/_werc/lib/$1)
        echo -n $sitesdir/$masterSite/_werc/lib/$1
    if not if(test -f lib/$1)
        echo -n lib/$1
    if not if(~ $#* 2)
        echo -n $2
    if not
        status='Can''t find lib file: '$1
}

fn template { awk -f bin/template.awk $* | rc $rcargs }

# Auth code
# TODO: check http://cookies.lcs.mit.edu/pubs/webauth:tr.pdf
allowed_user_chars='[a-zA-Z0-9_]'
# Cookie format: WERC_USER: name:timestamp:hash(name.timestamp.password)
# login_user can't be used from a template because it sets a cookie 
fn login_user {
    # Note: we set the cookie even if it is already there.
    if(get_user $*)
        set_cookie werc_user $"logged_user^':0:'^$"logged_password
}

# Check login status, if called with group arg we check membership too
fn check_user {
    get_user
    g=($* admin)
    _status=$status
    if(! ~ $"_status '')
        _status=(Not logged in: $"_status)
    if not if(! ~ $#* 0 && ! ~ $logged_user $* && ! grep -s '^'^$logged_user^'$' $werc_root/etc/users/$g/members >[2]/dev/null)
        _status=(User $logged_user not in: $*)
    status=$_status
}

# If not logged in, try to get user login info from POST or from cookie
fn get_user {
    if(~ $#logged_user 0) {
        if(~ $#* 2) {
            user_name=$1 
            user_password=$2
        }
        if not if(~ $REQUEST_METHOD POST)
            get_post_args user_name user_password

        if(~ $#user_name 0) { 
            ifs=':' { cu=`{ifs=$difs {get_cookie werc_user} | tr -d $NEW_LINE} }
            if(! ~ $#cu 0) {
                user_name=$cu(1) 
                user_password=$cu(3)
            }
        }
        auth_user $user_name $user_password
    }
    if not
        status=()
}

# Check if user_name and user_password represent a valid user account
# If valid, 'log in' by setting logged_user
fn auth_user {
    user_name=$1
    user_password=$2

    pfile=$werc_root/etc/users/$"user_name/password
    if(~ $#user_name 0 || ~ $#user_password 0)
        status=('Auth: missing user name or pass: '^$"user_name^' / '^$"user_password)
    if not if(! test -f $pfile)
        status=('Auth: cant find '^$pfile)
    if not if(! test -s $pfile || ! ~ $user_password `{cat $pfile})
        status=('Auth: Pass '$user_password' doesnt match '^`{cat $pfile})
    if not {
        logged_user=$user_name
        logged_password=$user_password
        dprint Auth: success
        status=()
    }
}

fn user_controls {
    echo User: $"logged_user
}


# .md '(meta-)data' extract
fn get_md_file_attr {
    sed -n '/^\* '$2': /p; /^\* '$2': /q; /^$/q' < $1
}


# File title extraction
fn get_md_title {
    #sed 's/^(................................................................[^ ]*).*$/\1/g; 1q' < $1 
    sed -n -e '1N; /^.*\n===*$/N; /.*\n===*\n *$/!b' -e 's/\n==*\n//p' < $1
}

fn get_html_title {
    t=`{sed -n '32q; s/^.*<[Tt][Ii][Tt][Ll][Ee]> *([^<]+) *(<\/[Tt][Ii][Tt][Ll][Ee]>.*)?$/\1/p' < $1}

    # As a backup we might want to pick the first 'non-tag' text in the file with:
    if(~ $"t '')
        t=`{sed -n -e 's/^(<[^>]+>)*([^<]+).*/\2/p; 32q' < $1 | sed 1q}

    echo $t
}

fn get_file_title {
    if (~ $1 *.md)
        get_md_title $1
    if not if(~ $1 *.html)
        get_html_title $1
    if not if(~ $1 */) {
        if(test -f $1/index.md)
            get_md_title $1/index.md
        if not if(test -f $1/index.html)
            get_html_title $1/index.html
    }
}

fn ndate {
	if(~ $#* 7)
		date=$*(2-)
	if not
		date=`{date}
	switch($date(2)){
	case Jan;	mo=01
	case Feb;	mo=02
	case Mar;	mo=03
	case Apr;	mo=04
	case May;	mo=05
	case Jun;	mo=06
	case Jul;	mo=07
	case Aug;	mo=08
	case Sep;	mo=09
	case Oct;	mo=10
	case Nov;	mo=11
	case Dec;	mo=12
	}
	switch($date(3)){
	case [0-9]
		da=0^$date(3)
	case *
		da=$date(3)
	}
	switch($date(5)){
	case A;	tz=+0100
	case ADT;	tz=-0300
	case AFT;	tz=+430
	case AKDT;	tz=-0800
	case AKST;	tz=-0900
	case ALMT;	tz=+0600
	case AMST;	tz=-0300
	case AMT;	tz=-0400
	case ANAST;	tz=+1200
	case ANAT;	tz=+1200
	case AQTT;	tz=+0500
	case ART;	tz=-0300
	case AST;	tz=-0400
	case AZOST;	tz=+0000
	case AZOT;	tz=-0100
	case AZST;	tz=+0500
	case AZT;	tz=+0400
	case B;	tz=+0200
	case BNT;	tz=+0800
	case BOT;	tz=-0400
	case BRST;	tz=-0200
	case BRT;	tz=-0300
	case BST;	tz=+0100
	case BTT;	tz=+0600
	case C;	tz=+0300
	case CAST;	tz=+0800
	case CAT;	tz=+0200
	case CCT;	tz=+0630
	case CDT;	tz=-0500
	case CEST;	tz=+0200
	case CET;	tz=+0100
	case CHADT;	tz=+1345
	case CHAST;	tz=+1245
	case CKT;	tz=-1000
	case CLST;	tz=-0300
	case CLT;	tz=-0400
	case COT;	tz=-0500
	case CST;	tz=-0600
	case CVT;	tz=-0100
	case CXT;	tz=+0700
	case ChST;	tz=+1000
	case D;	tz=+0400
	case DAVT;	tz=+0700
	case E;	tz=+0500
	case EASST;	tz=-0500
	case EAST;	tz=-0600
	case EAT;	tz=+0300
	case ECT;	tz=-0500
	case EDT;	tz=-0400
	case EEST;	tz=+0300
	case EET;	tz=+0200
	case EGST;	tz=+0000
	case EGT;	tz=-0100
	case EST;	tz=-0500
	case ET;	tz=-0500
	case F;	tz=+0600
	case FJST;	tz=+1300
	case FJT;	tz=+1200
	case FKST;	tz=-0300
	case FKT;	tz=-0400
	case FNT;	tz=-0200
	case G;	tz=+0700
	case GALT;	tz=-0600
	case GAMT;	tz=-0900
	case GET;	tz=+0400
	case GFT;	tz=-0300
	case GILT;	tz=+1200
	case GMT;	tz=+0000
	case GST;	tz=+0400
	case GYT;	tz=-0400
	case H;	tz=+0800
	case HAA;	tz=-0300
	case HAC;	tz=-0500
	case HADT;	tz=-0900
	case HAE;	tz=-0400
	case HAP;	tz=-0700
	case HAR;	tz=-0600
	case HAST;	tz=-1000
	case HAT;	tz=-0230
	case HAY;	tz=-0800
	case HKT;	tz=+0800
	case HLV;	tz=-0430
	case HNA;	tz=-0400
	case HNC;	tz=-0600
	case HNE;	tz=-0500
	case HNP;	tz=-0800
	case HNR;	tz=-0700
	case HNT;	tz=-0330
	case HNY;	tz=-0900
	case HOVT;	tz=+0700
	case I;	tz=+0900
	case ICT;	tz=+0700
	case IDT;	tz=+0300
	case IOT;	tz=+0600
	case IRDT;	tz=+0430
	case IRKST;	tz=+0900
	case IRKT;	tz=+0800
	case IRST;	tz=+0330
	case IST;	tz=+0200
	case JST;	tz=+0900
	case K;	tz=+1000
	case KGT;	tz=+0600
	case KRAST;	tz=+0800
	case KRAT;	tz=+0700
	case KST;	tz=+0900
	case KUYT;	tz=+0400
	case L;	tz=+1100
	case LHDT;	tz=+1100
	case LHST;	tz=+1030
	case LINT;	tz=+1400
	case M;	tz=+1200
	case MAGST;	tz=+1200
	case MAGT;	tz=+1100
	case MART;	tz=-0930
	case MAWT;	tz=+0500
	case MDT;	tz=-0600
	case MHT;	tz=+1200
	case MMT;	tz=+0630
	case MSD;	tz=+0400
	case MSK;	tz=+0300
	case MST;	tz=-0700
	case MUT;	tz=+0400
	case MVT;	tz=+0500
	case MYT;	tz=+0800
	case N;	tz=-0100
	case NCT;	tz=+1100
	case NDT;	tz=-0230
	case NFT;	tz=+1130
	case NOVST;	tz=+0700
	case NOVT;	tz=+0600
	case NPT;	tz=+0545
	case NST;	tz=-0330
	case NUT;	tz=-1100
	case NZDT;	tz=+1300
	case NZST;	tz=+1200
	case O;	tz=-0200
	case OMSST;	tz=+0700
	case OMST;	tz=+0600
	case P;	tz=-0300
	case PDT;	tz=-0700
	case PET;	tz=-0500
	case PETST;	tz=+1200
	case PETT;	tz=+1200
	case PGT;	tz=+1000
	case PHOT;	tz=+1300
	case PHT;	tz=+0800
	case PKT;	tz=+0500
	case PMDT;	tz=-0200
	case PMST;	tz=-0300
	case PONT;	tz=+1100
	case PST;	tz=-0800
	case PT;	tz=-0800
	case PWT;	tz=+0900
	case PYST;	tz=-0300
	case PYT;	tz=-0400
	case Q;	tz=-0400
	case R;	tz=-0500
	case RET;	tz=+0400
	case S;	tz=-0600
	case SAMT;	tz=+0400
	case SAST;	tz=+0200
	case SBT;	tz=+1100
	case SCT;	tz=+0400
	case SGT;	tz=+0800
	case SRT;	tz=-0300
	case SST;	tz=-1100
	case T;	tz=-0700
	case TAHT;	tz=-1000
	case TFT;	tz=+0500
	case TJT;	tz=+0500
	case TKT;	tz=-1000
	case TLT;	tz=+0900
	case TMT;	tz=+0500
	case TVT;	tz=+1200
	case U;	tz=-0800
	case ULAT;	tz=+0800
	case UYST;	tz=-0200
	case UYT;	tz=-0300
	case UZT;	tz=+0500
	case V;	tz=-0900
	case VET;	tz=-0430
	case VLAST;	tz=+1100
	case VLAT;	tz=+1000
	case VUT;	tz=+1100
	case W;	tz=-1000
	case WAST;	tz=+0200
	case WAT;	tz=+0100
	case WDT;	tz=+0900
	case WEST;	tz=+0100
	case WET;	tz=+0000
	case WFT;	tz=+1200
	case WGST;	tz=-0200
	case WGT;	tz=-0300
	case WIB;	tz=+0700
	case WIT;	tz=+0900
	case WITA;	tz=+0800
	case WST;	tz=+0800
	case WT;	tz=+0000
	case X;	tz=-1100
	case Y;	tz=-1200
	case YAKST;	tz=+1000
	case YAKT;	tz=+0900
	case YAPT;	tz=+1000
	case YEKST;	tz=+0600
	case YEKT;	tz=+0500
	case Z;	tz=+0000
	}
	switch($1){
	case -a	# rfc3339
		tz=`{echo $tz | sed 's/00$/:00/'}
		echo $date(6)^-$mo-$da^T^$date(4)^$tz
	case -i	# iso-8601 lite
		echo $date(6)^-$mo-$da
	case -m	# rfc2822
		echo $date(1)^, $da $date(2) $date(6) $date(4) $tz
	case -t	# iso-8601
		echo $date(6)^-$mo-$da^T^$date(4)^$tz
	}
}

##########################################################################
##########################################################################
#app_blog_methods = ( _post index.rss )
#fn app_blog__post {
#    echo
#}
#
#app_blog___default {
#    if (~ $blog)
#    call_app blogpost
#}
#
## --
#app_blogpost_methods = ( comment  _edit )
#
#fn app_blogpost_comment {
#    call_app comments
#}
#
## --
#app_comments_methods = ( _post _edit )
#
#fn app_comments___default {
#
#}