1secmail

#!/usr/bin/env bash
#
# A script to use 1secmail temp mail service in terminal
#
#/ Usage:
#/   ./1secmail [-u <inbox>|-i <id>|-r|-s|-t|-b]
#/
#/ Options:
#/   no option        Randamly get an inbox
#/   -u <inbox>       Optional, get an inbox by its mail address
#/   -i <id>          Optional, show mail by its id
#/   -r               Optional, show the most recent mail
#/   -s               Optional, show available domains
#/   -t               Optional, show plain text without using w3m
#/   -b               Optional, show data URL with base64 encoded message
#/   -h | --help      Display this help message
#/
#/ Examples:
#/   \e[32m- Generate a random inbox:\e[0m
#/     ~$ ./1secmail
#/
#/   \e[32m- Get mails in test@1secmail.com inbox:\e[0m
#/     ~$ ./1secmail \e[33m-u 'test@1secmail.com'\e[0m
#/
#/   \e[32m- Show mail 84113380 detail: \e[0m
#/     ~$ ./1secmail \e[33m-u 'test@1secmail.com' -i 84113380\e[0m
#/
#/   \e[32m- Show the most recent mail: \e[0m
#/     ~$ ./1secmail -u 'test@1secmail.com' \e[33m-r\e[0m
#/
#/   \e[32m- Show all available domains: \e[0m
#/     ~$ ./1secmail \e[33m-s\e[0m

set -e
set -u

usage() {
    # Display usage message
    printf "\n%b\n" "$(grep '^#/' "$0" | cut -c4-)" && exit 0
}

set_var() {
    # Declare variables
    _HOST="http://1secmail.net/api/v1"
    _INBOX_URL="$_HOST/?action=getMessages"
    _MESSAGE_URL="$_HOST/?action=readMessage"
}

set_command() {
    # Declare commands
    _CURL="$(command -v curl)" || command_not_found "curl" "https://curl.haxx.se/download.html"
    _JQ="$(command -v jq)" || command_not_found "jq" "https://stedolan.github.io/jq/"
    _W3M="$(command -v w3m)" || true
    _FAKER="$(command -v faker-cli)" || true
}

set_args() {
    # Declare arguments
    expr "$*" : ".*--help" > /dev/null && usage
    while getopts ":hrstbu:i:" opt; do
        case $opt in
            u)
                _INBOX="$OPTARG"
                ;;
            i)
                _MESSAGE_UID="$OPTARG"
                _FLAG_GET_MESSAGE=true
                ;;
            r)
                _FLAG_RECENT_MAIL=true
                ;;
            s)
                _FLAG_SHOW_DOMAIN=true
                ;;
            t)
                _FLAG_SHOW_TEXT=true
                ;;
            b)
                _FLAG_SHOW_B64=true
                ;;
            h)
                usage
                ;;
            \?)
                echo "Invalid option: -$OPTARG" >&2
                usage
                ;;
        esac
    done
}

command_not_found() {
    # Show command not found message
    # $1: command name
    # $2: installation URL
    printf "%b\n" '\033[31m'"$1"'\033[0m command not found!'
    [[ -n "${2:-}" ]] && printf "%b\n" 'Install from \033[31m'"$2"'\033[0m'
    exit 1
}

fake_username () {
    # Create a fake user
    if [[ -z "$_FAKER" ]]; then
        tr -dc 'a-z0-9' < /dev/urandom \
            | head -c9
    else
        sed -E 's/"//g' <<< "$($_FAKER -n firstName).$($_FAKER -n lastName)" \
            | tr '[:upper:]' '[:lower:]'
    fi
}

get_inbox() {
    # Get inbox by mailbox address
    # $1: address
    local login domain
    login=$(awk -F '@' '{print $1}' <<< "$1")
    domain=$(awk -F '@' '{print $2}' <<< "$1")
    $_CURL -sSL "${_INBOX_URL}&login=${login}&domain=${domain}" | $_JQ .
}

get_recent_message() {
    # Get the most recent message
    # $1: address
    local messages
    messages="$(get_inbox "$_INBOX")"
    if [[ -z "$messages" ]]; then
        echo "Message not found"
        exit 0
    else
        get_message "$_INBOX" "$($_JQ -r '.[0].id' <<< "$messages")"
    fi
}

get_message() {
    # Get message by id
    # $1: address
    # $2: id
    local login domain message
    login=$(awk -F '@' '{print $1}' <<< "$1")
    domain=$(awk -F '@' '{print $2}' <<< "$1")
    message="$($_CURL -sSL "${_MESSAGE_URL}&login=${login}&domain=${domain}&id=${2}")"
    if [[ "$message" == "Message not found" ]]; then
        echo "$message"
        exit 0
    else
        if [[ -z $_W3M  || -n "${_FLAG_SHOW_TEXT:-}" ]]; then
            $_JQ -r '.htmlBody' <<< "$message"
        elif [[ -n "${_FLAG_SHOW_B64:-}" ]]; then
            echo "data:text/html;base64,$($_JQ -r ".htmlBody" <<< "$message" | base64)"
        else
            local from subject date body
            from="$($_JQ -r ".from" <<< "$message")"
            subject="$($_JQ -r ".subject" <<< "$message")"
            date="$($_JQ -r ".date" <<< "$message")"
            body="$($_JQ -r ".htmlBody" <<< "$message")"
            $_W3M -T "text/html" <<< "<pre><b>Date:</b> ${date}<br/><b>From:</b> ${from}<br/><b>To:</b> ${1}<br/><b>Subject:</b> ${subject}</pre>${body}"
        fi
    fi
}

show_domain() {
    # Show available domains
    "$_CURL" -sS 'https://www.1secmail.com/api/v1/?action=getDomainList' | "$_JQ" -r '.[]'
}

show_random_domain() {
    # Show available domains in a random order
    show_domain | shuf
}

get_random_inbox() {
    # Get a randam inbox
    local u d
    u=$(fake_username)
    d=$(show_random_domain | tail -1)

    get_inbox "$u@$d"
    echo "$u@$d"
}

main() {
    set_args "$@"
    set_command
    set_var

    if [[ -z "$*" ]]; then
        get_random_inbox
    else
        [[ -n "${_FLAG_SHOW_DOMAIN:-}" ]] && show_domain
        if [[ -n "${_INBOX:-}" ]]; then
            if [[ "${_FLAG_GET_MESSAGE:-}" == true ]]; then
                get_message "$_INBOX" "${_MESSAGE_UID:-}"
            elif [[ -n "${_FLAG_RECENT_MAIL:-}" ]]; then
                get_recent_message "$_INBOX"
            else
                get_inbox "$_INBOX"
            fi
        fi
    fi
}

if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
    main "$@"
fi