# Werc builtin handlers

fn nav_tree {
    if(! ~ $#sideBarNavTitle 0)
        echo '<p class="sideBarTitle">'$"sideBarNavTitle':</p>'
    # Ignore stderr, last path element might be a file that doesn't exist (eg., foo for foo.md)
    # /./ to deal with p9p's ls failure to follow dir symlinks otherwise
    ls -F $sitedir/./$req_paths_list >[2]/dev/null \
        | { 
            sed $dirfilter'/\/[^_.\/][^\/]*(\.(md|txt|html)|\/)$/!d; s!^'$sitedir'!!; '$dirclean 
            if(! ~ $#synth_paths 0) echo $synth_paths | tr ' ' $NEW_LINE 
        } | sort -u | awk -F/ ' 
    function p(x, y, s) { for(i=0; i < x-y; i+=1) print s }
    BEGIN { lNF=2; print "<ul><li><a href='/'>› <span class='dt'>home</span></a></li>" }
    { 
        d = ""
        if(match($0, "/$"))
            d = "/"
        sub("/$", "") # Strip trailing / for dirs so NF is consistent 

        p(NF, lNF, "<li><ul>")
        p(lNF, NF, "</ul></li>")
        lNF = NF

        bname = $NF d
        path = $0 d
        gsub(/[\-_]/, " ", bname)

        # To avoid false matches add trailing / even for plain files to act as delimiter
        pa = path
        gsub(/[^\/]$/, "&/", pa) 

        if(index(ENVIRON["req_path"] "/", pa) == 1)
            print "<li><a href=\"" path "\" class=\"thisPage\">&raquo; <i><span class='dt'>" bname "</span></i></a></li>"
        else 
            print "<li><a href=\"" path "\">&rsaquo; <span class='dt'>" bname "</span></a></li>"
    }
    END { p(lNF, 2, "</ul></li>"); print "</ul>" }'
}

fn link_bar {
    if(~ $1 -t) {
        echo '<p class="sideBarTitle">'$2'</p>'
        shift; shift
    }
    echo '<ul>'
    while(! ~ $#* 0) {
        echo '<li><a href="'$2'">- '$1'</a></li>'
        shift; shift
    }
    echo '</ul>'
}

fn md_handler { $formatter $1 }

fn tpl_handler { template $* }

fn html_handler {
    # body states: 0 = no <body> found, 2 = after <body>, 1 = after <body></body>, -1 = after </body>
    awk 'gsub(".*<[Bb][Oo][Dd][Yy][^>]*>", "") > 0 {body=2}
        gsub("</ *[Bb][Oo][Dd][Yy][^>]*>.*", "") > 0 {print; body=body-1}
        body==2 {print}
        body==0 {buf=buf "\n" $0}
        END {if(body<=0) {print buf}}' < $1
}

fn txt_handler {
    # Note: Words are not broken, even if they are way beyond 82 chars long
    echo '<pre>'
    sed 's/</\&lt;/g; s/>/\&gt;/g' < $1 | fmt -l 82 -j
    echo '</pre>'
}

fn dir_listing_handler {
    d=`{basename -d $1}
    if(~ $#d 0)
        d='/'
    echo $d|sed 's,.*//,,g; s,/$,,; s,/, / ,g; s,.*,<h1 class="dir-list-head">&</h1> <ul class="dir-list">,'
    # Symlinks suck: '/.' forces ls to list the linked dir if $d is a symlink.
    ls -F $dir_listing_ls_opts $sitedir$d/. | sed $dirfilter$dirclean' s,.*/([^/]+/?)$,<li><a href="\1">\1</a></li>,'
    echo '</ul>'
}

fn notices_handler {
    for(type in notify_errors notify_notes notify_success)
        for(n in $$type)
            echo '<div class="'$type'"><b>'$"n'</b></div>'
}

fn setup_handlers {

    if(test -f $local_path.md) {
        local_file=$local_path.md
        handler_body_main=(md_handler $local_file)
    }
    if not if(test -f $local_path.tpl) {
        local_file=$local_path.tpl
        handler_body_main=(tpl_handler $local_file)
    }
    if not if(test -f $local_path.html) {
        local_file=$local_path.html
        handler_body_main=(html_handler $local_file)
    }
    # Global tpl (eg sitemap.tpl), should take precedence over txt handler!
    if not if(test -f tpl^$req_path^.tpl)
        # XXX Should we set $local_file for global .tpls?
        handler_body_main=(tpl_handler tpl^$req_path^.tpl)
    if not if(test -f $local_path.txt) {
        local_file=$local_path.txt
        handler_body_main=(txt_handler $local_file)
    }

    # XXX Should check that $enabled_apps exist in $werc_apps?
    # XXX Should split init of apps that provide main handler (eg., blog) and apps that don't (eg., comments)?
    if(! ~ $#enabled_apps 0)
        for(a in $enabled_apps)
            $a^'_init'

    if(! ~ $#handler_body_main 0) { 
        # WE ARE NOT DONE I WANT MY HEADERS
        if(test -f $sitedir$req_path'_header.md')
            ll_add handlers_body_head md_handler $sitedir$req_path'_header.md'            
        if(test -f $sitedir$req_path'_footer.md')
            ll_add handlers_body_foot md_handler $sitedir$req_path'_footer.md'
    } # We are done
    # Dir listing
    if not if(~ $local_path */index) {
        handler_body_main=(dir_listing_handler $req_path)
        if(test -f $sitedir$req_path'_header.md')
            ll_add handlers_body_head md_handler $sitedir$req_path'_header.md'            
        if(test -f $sitedir$req_path'_footer.md')
            ll_add handlers_body_foot md_handler $sitedir$req_path'_footer.md'            
    }
    # Canonize explicit .html urls, the web server might handle this first!
    if not if(~ $local_path *.html && test -f $local_path)
        perm_redirect `{ echo $req_path|sed 's/.html$//' }
    # Fallback static file handler
    if not if(test -f $local_path)
        static_file $local_path
    if not if(~ $req_path /pub/* && test -f .$req_path)
        static_file .$req_path
    # File not found
    if not
        setup_404_handler
}

# This function allows config files to define their own 404 handlers.
fn setup_404_handler {
    handler_body_main=(tpl_handler `{get_lib_file 404.tpl})
    echo 'Status: 404 Not Found'
    dprint 'NOT FOUND: '$SERVER_NAME^$"REQUEST_URI^' - '^$"HTTP_REFERER^' - '^$"HTTP_USER_AGENT
}

fn run_handlers { for(h in $*) run_handler $$h }
fn run_handler { $*(1) $*(2-) }


