#!/usr/bin/env bash

# Displays a list of the tags
#
# $2 if "-n", tags will be sorted by number of posts
declare prefix_tags
declare template_tags_posts_singular
declare template_tags_posts
list_tags() {  
    if [[ $2 == -n ]]; then do_sort=1; else do_sort=0; fi

    if ls "./${prefix_tags}"*.html > /dev/null; then
        echo "No posts yet. Use '$0 post' to create one" && return
    fi

    lines=""
    for i in "./${prefix_tags}"*.html; do
        [[ -f "$i" ]] || break
        nposts=$(grep -c "<\!-- text begin -->" "$i")
        tagname=${i#"$prefix_tags"}
        tagname=${tagname#.html}
        ((nposts > 1)) && word=$template_tags_posts || word=$template_tags_posts_singular
        line="$tagname # $nposts # $word"
        lines+=$line\\n
    done

    if ((do_sort == 1)); then
        echo -e "$lines" | column -t -s "#" | sort -nrk 2
    else
        echo -e "$lines" | column -t -s "#"
    fi
}