#!/data/data/com.termux/files/usr/bin/sh

# Simple indexing test using HTTrack
# A "real" script/program would use advanced search, and
# use dichotomy to find the word in the index.txt file
# This script is really basic and NOT optimized, and
# should not be used for professional purpose :)

TESTSITE="http://localhost/"

# Create an index if necessary
if ! test -f "index.txt"; then
    echo "Building the index .."
    rm -rf test
    httrack --display "$TESTSITE" -%I -O test
    mv test/index.txt ./
fi

# Convert crlf to lf
if test "$(head index.txt -n 1 | tr '\r' '#' | grep -c '#')" = "1"; then
    echo "Converting index to Unix LF style (not CR/LF) .."
    mv -f index.txt index.txt.old
    tr -d '\r' <index.txt.old >index.txt
fi

keyword=-
while test -n "$keyword"; do
    printf "Enter a keyword: "
    read -r keyword

    if test -n "$keyword"; then
        FOUNDK="$(grep -niE "^$keyword" index.txt)"

        if test -n "$FOUNDK"; then
            if ! test "$(echo "$FOUNDK" | wc -l)" = "1"; then
                # Multiple matches
                printf "Found multiple keywords: "
                echo "$FOUNDK" | cut -f2 -d':' | tr '\n' ' '
                echo ""
                echo "Use keyword$ to find only one"
            else
                # One match
                N=$(echo "$FOUNDK" | cut -f1 -d':')
                PM=$(tail "+$N" index.txt | grep -nE "\(" | head -n 1)
                if ! echo "$PM" | grep "ignored" >/dev/null; then
                    M=$(echo "$PM" | cut -f1 -d':')
                    echo "Found in:"
                    tail "+$N" index.txt | head -n "$M" | grep -E "[0-9]* " | cut -f2 -d' '
                else
                    echo "keyword ignored (too many hits)"
                fi
            fi
        else
            echo "not found"
        fi

    fi
done
