previewer

#!/usr/bin/env bash

## By Davoud Arsalani
##    https://github.com/davoudarsalani/scripts
##    https://github.com/davoudarsalani/scripts/blob/master/previewer
##    https://raw.githubusercontent.com/davoudarsalani/scripts/master/previewer
##    https://davoudarsalani.ir

function hi_li {
    head -n 50 "$1" | eval "$HIGHLIGHT" 2>/dev/null  ## NOTE do not replace 2 with &
}

function me_in {
    mediainfo "$1"
}

attr="$(lsattr "$1" | awk '{print $1}')"
file_mime_type="$(file --mime-type "$1" -bL)"

case "$file_mime_type" in
    audio/* )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(me_in "$1")" ;;
    video/* )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(me_in "$1")" ;;
    text/* )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(hi_li "$1")" ;;
    application/json )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(hi_li "$1")" ;;
    application/csv )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(hi_li "$1")" ;;
    message/news )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(hi_li "$1")" ;;
    */octet-stream )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "" ;;
    application/msword )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "" ;;
    */*spreadsheet* )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "" ;;
    */*officedocument* )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "" ;;
    */*opendocument* )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "" ;;
    */pdf )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "" ;;
    image/* )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(me_in "$1")" ;;
    */*tar )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(tar -tvf "$1" | awk '{print $NF}' | sort --numeric-sort | head -50)" ;;
    */gzip )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(tar -tvf "$1" | awk '{print $NF}' | sort --numeric-sort | head -50)" ;;
    *bzip2 )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "" ;;
    */zip )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(unzip -l "$1" | sed '1,3d' | awk '{print $4}' | sed '/^$/d' | sort --numeric-sort | head -50)" ;;
    */*rar )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "$(unrar l "$1" | sed '1,8d' | head -n -3 | awk '{print $NF}' | sort --numeric-sort | head  -50)" ;;
    */*iso*image )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "" ;;
    * )
        printf '%s %s\n\n%s\n' "$attr" "$file_mime_type" "" ;;
esac