#!/usr/bin/env bash

# Parse the plain text file into an html file
#
# $1    source file name
# $2    (optional) timestamp for the file
# $3    (optional) destination file name
# note that although timestamp is optional, something must be provided at its
# place if destination file name is provided, i.e:
# parse_file source.txt "" destination.html
declare convert_filename
declare template_tags_line_header
declare prefix_tags
declare global_author
parse_file() {
    # Read for the title and check that the filename is ok
    title=""
    while IFS='' read -r line; do
        if [[ -z $title ]]; then
            # remove extra <p> and </p> added by markdown
            title=$(echo "$line" | sed 's/<\/*p>//g')
            if [[ -n $3 ]]; then
                filename=$3
            else
                filename=$title
                [[ -n $convert_filename ]] && filename=$(echo "$title" | eval "$convert_filename")
                [[ -n $filename ]] || filename=$RANDOM # don't allow empty filenames
                filename=$filename.html

                # Check for duplicate file names
                while [[ -f $filename ]]; do
                    filename=${filename%.html}$RANDOM.html
                done
            fi
            content=$filename.tmp
            # Parse possible tags
        elif [[ $line == "<p>$template_tags_line_header"* ]]; then
            tags=$(echo "$line" | cut -d ":" -f 2- | sed -e 's/<\/p>//g' -e 's/^ *//' -e 's/ *$//' -e 's/, /,/g')
            IFS=, read -r -a array <<<"$tags"

            echo -n "<p>$template_tags_line_header " >>"$content"
            for item in "${array[@]}"; do
                echo -n "<a href='$prefix_tags$item.html'>$item</a>, "
            done | sed 's/, $/<\/p>/g' >>"$content"
        else
            echo "$line" >>"$content"
        fi
    done <"$1"

    # Create the actual html page
    create_html_page "$content" "$filename" no "$title" "$2" "$global_author"
    rm "$content"
}