# jsjs / tsts / cscs
# Save the three cheatsheet .txt files into one folder, then point this
# variable at that folder. Default is ~/cheatsheets.
#
# In ~/.bashrc or ~/.zshrc:
#   export CHEATSHEET_DIR="$HOME/cheatsheets"
#   source /path/to/cheatsheet-aliases.sh
#
# Usage:
#   jsjs
#   jsjs ARRAY
#   tsts GENERICS
#   cscs LIST

CHEATSHEET_DIR="${CHEATSHEET_DIR:-$HOME/cheatsheets}"

_cheatsheet() {
    local file="$1"
    shift
    if [ $# -eq 0 ]; then
        less "$file"
        return
    fi

    awk -v IGNORECASE=1 -v pat="$*" '
    BEGIN {
        found=0
    }

    /^=+$/ {
        getline title
        getline underline

        if (tolower(title) ~ tolower(pat)) {
            found=1
            print "===================================================================="
            print title
            print underline

            while (getline) {
                if ($0 ~ /^=+$/) {
                    getline nexttitle
                    getline nextunderline

                    print ""
                    exit
                }
                print
            }
            exit
        }
    }

    END {
        if (!found)
            print "No section found."
    }
    ' "$file" | less
}

jsjs() { _cheatsheet "$CHEATSHEET_DIR/javascript-cheatsheet.txt" "$@"; }
tsts() { _cheatsheet "$CHEATSHEET_DIR/typescript-cheatsheet.txt" "$@"; }
cscs() { _cheatsheet "$CHEATSHEET_DIR/csharp-cheatsheet.txt" "$@"; }