#!/bin/bash


if [ "$(basename "$0")" == "dropbox_to_read" ]; then
    TMPDIR="$(mktemp -d)"
    PDF_FILE=$(bibtex_to_paper --only-print "$1")
    mkdir -p "$TMPDIR/a"
    mkdir -p "$TMPDIR/b"
    cp -l "$PDF_FILE" "$TMPDIR/a/file.pdf";
    if [ -e "${PDF_FILE}.annot" ]; then
        cp "$PDF_FILE" "$TMPDIR/b/file.pdf";
        chmod u+w "$TMPDIR/b/file.pdf"
        qprint -d "${PDF_FILE}.annot" | patch -d "$TMPDIR/b" --binary;
    else
        cp "$PDF_FILE" "$TMPDIR/b/file.pdf";
        chmod u+w "$TMPDIR/b/file.pdf"
    fi;
    cp "$TMPDIR/b/file.pdf" ~/Dropbox/research_papers/to_read/"$(basename "$PDF_FILE")";
    rm -f "$TMPDIR/a/file.pdf"
    rm -f "$TMPDIR/b/file.pdf"
    rmdir "$TMPDIR/a" "$TMPDIR/b" "$TMPDIR"
fi;

if [ "$(basename "$0")" == "dropbox_read" ]; then
    #echo "Currently not implemented";
    # exit 1;
    while IFS= read -r -d '' file; do
        unset IFS
        PDF_FILE="$(bibtex_to_paper --only-print --search-by-file "$(basename "$file")")"
        if [ -n "$PDF_FILE" ]; then
            ( set -e
              TMPDIR="$(mktemp -d)"
              mkdir -p "$TMPDIR/a";
              mkdir -p "$TMPDIR/b";
              cp -l "${PDF_FILE}" "$TMPDIR/a/file.pdf";
              chmod u+w "$TMPDIR/a/file.pdf"
              cp -l "$file" "$TMPDIR/b/file.pdf";
              echo "${PDF_FILE}.annot";
              (cd "$TMPDIR";
               diff -Nura a b ) | qprint --encode --binary > "${PDF_FILE}.annot"
              # delete the annot file if it has size 0
              if ! [ -s "${PDF_FILE}.annot" ]; then
                  rm -f "${PDF_FILE}.annot"
              fi;
              rm -f "$TMPDIR/a/file.pdf"
              rm -f "$TMPDIR/b/file.pdf"
              rmdir "$TMPDIR/a" "$TMPDIR/b" "$TMPDIR"
              mv "$file" ~/Dropbox/research_papers/annotations_recorded
            );
        fi;
    done < <(find ~/Dropbox/research_papers/read/ -type f -print0)
fi;