#!/usr/bin/env bash

# Edit an existing, published .html file while keeping its original timestamp
# Please note that this function does not automatically republish anything, as
# it is usually called from 'main'.
#
# Note that it edits HTML file, even if you wrote the post as markdown originally
# Note that if you edit title then filename might also change
#
# $1 	the file to edit
# $2	(optional) edit mode:
#	"keep" to keep old filename
#	"full" to edit full HTML, and not only text part (keeps old filename)
#	leave empty for default behavior (edit only text part and change name)
declare date_format_full
declare date_format_timestamp
declare template_tags_line_header
declare prefix_tags
edit() {

    [[ ! -f "${1%%.*}.html" ]] && \
        printf "Can't edit post \"%s.html\", did you mean to use \"bb.sh post <draft_file>\"?\\n" "${1%%.*}" && exit 1

    # Original post timestamp
    edit_timestamp=$(LC_ALL=C date -r "${1%%.*}.html" +"$date_format_full")
    touch_timestamp=$(LC_ALL=C date -r "${1%%.*}.html" +"$date_format_timestamp")
    tags_before=$(tags_in_post "${1%%.*}.html")
    if [[ $2 == full ]]; then
        $EDITOR "$1"
        filename=$1
    else
        if [[ ${1##*.} == md ]]; then
            # editing markdown file
            $EDITOR "$1"
            TMPFILE=$(make_html "$1")
            filename=${1%%.*}.html
        else
            # Create the content file
            TMPFILE=$(basename "$1").$RANDOM.html
            # Title
            get_post_title "$1" >"$TMPFILE"
            # Post text with plaintext tags
            get_html_file_content 'text' 'text' <"$1" | sed "/^<p>$template_tags_line_header/s|<a href='$prefix_tags\([^']*\).html'>\\1</a>|\\1|g" >>"$TMPFILE"
            $EDITOR "$TMPFILE"
            filename=$1
        fi
        rm "$filename"
        if [[ $2 == keep ]]; then
            parse_file "$TMPFILE" "$edit_timestamp" "$filename"
        else
            parse_file "$TMPFILE" "$edit_timestamp" # this command sets $filename as the html processed file
            [[ ${1##*.} == md ]] && mv "$1" "${filename%%.*}.md" 2>/dev/null
        fi
        rm "$TMPFILE"
    fi
    touch -t "$touch_timestamp" "$filename"
    touch -t "$touch_timestamp" "$1"
    chmod 644 "$filename"
    echo "Posted $filename"
    tags_after=$(tags_in_post "$filename")
    relevant_tags=$(echo "$tags_before $tags_after" | tr ',' ' ' | tr ' ' '\n' | sort -u | tr '\n' ' ')
    if [[ -n $relevant_tags ]]; then
        # shellcheck disable=SC2086 # Intended splitting of $relevant_tags
        relevant_posts="$(posts_with_tags $relevant_tags) $filename"
        rebuild_tags "$relevant_posts" "$relevant_tags"
    fi
}