#! /bin/bash

template="./pages/template.html"
output_directory="./website/"

cut_whitespace() {
    ws="${line%%[![:space:]]*}" # get whitespace and store to ws
    line="${line#"$ws"}" # remove whitespace from line
}

pages=()
while IFS= read -r line; do
    pages+=("$line")
done < "pages.txt"

for page in "${pages[@]}"; do
    page_content=()
    output=
    while IFS= read -r line; do
        page_content+=("$line\n")
    done < "./pages/$page"
    while IFS= read -r line; do
        cut_whitespace
        if [[ "$line" == "<title><!--TITLE--></title>" ]]; then
            line="$ws${page_content[0]}"
            unset 'page_content[0]'
            page_content=("${page_content[@]}")
        elif [[ "$line" == "<!--HEADER-->" ]]; then
            line="$ws${page_content[0]}"
            unset 'page_content[0]'
            page_content=("${page_content[@]}")
        elif [[ "$line" == "<!--CONTENT-->" ]]; then
            line=
            for content_line in "${page_content[@]}"; do
                line+="$content_line"
            done
        else
            line="$ws$line\n"
        fi
        output+="$line"
    done < "$template"
    echo "built $page..."
    echo -e "$output" > "$output_directory$page"
done