terminal

# Terminal

[![Language](https://img.shields.io/badge/language-crystal-776791.svg)](https://github.com/crystal-lang/crystal)
[![Tag](https://img.shields.io/github/tag/icyleaf/terminal.svg)](https://github.com/icyleaf/terminal/blob/master/CHANGELOG.md)
[![Build Status](https://img.shields.io/circleci/project/github/icyleaf/terminal/master.svg?style=flat)](https://circleci.com/gh/icyleaf/terminal)

Terminal output styling with intuitive, clean and easy API written by Crystal.

## Installation

Add this to your application's `shard.yml`:

```yaml
dependencies:
  terminal:
    github: icyleaf/terminal
```

## Usage

### UI

```crystal
require "terminal"

# Usage for Shell UI
Terminal.message "hello world" # => "hello world"
Terminal.success "well done" # => "\e[32mwell done\e[0m"
Terminal.important "Your password is too easy" # => "\e[33mYour password is too easy\e[0m"
Terminal.error "Invaild username or password" # => "\e[31mInvaild username or password\e[0m"
Terminal.command "crystal version" # => "\e[36m$ crystal version\e[0m"
```

#### Methods

Full methods below:

method | level | description
---|---|---
header | `INFO` | normal default color with table border (Not compatible with emoji)<br />+-----+<br />\|Install\|<br />+-----+
message | `INFO` | normal default color
success | `INFO` | <label style="color:green">green color</label>
important | `WARN` | <label style="color:yellow">yellow color</label>
error | `ERROR` | <label style="color:red">red color</label>
verbose | `DEBUG` | normal default color
deprecated | `WARN` | <label style="color:blue;font-weight:bold">blue with bold color</label>
command | `INFO` | <label style="color:cyan">cyan color</label>
command_output | `INFO` | <label style="color:magenta">magenta color</label>
crash! | Terminal::Crash | an exception by program itself
user_error! | Terminal::UserError | an exception by user opertions
shell_error! | Terminal::ShellError | an exception by run shell command

### Shell command

```
require "terminal"

# Check command result
Terminal.test "crystal" # => true

# Run shell command
Terminal.sh "pwd"
$ pwd
▸ /Users/icyleaf
```

### Enable/Disable color

`Terminal.enable_color`/`Terminal.disable_color`

### Verbose mode

Set Enviroment `TERMINAL_UI_SHOW_TIMESTAMP` to `1/true`

```crystal
Terminal.success "Installed successful"
# => "INFO 2017-10-22 12:45:33 \e[32mInstalled successful\e[0m"
```

### Adviances

All the output based on `Logger`, Here support one way to custom the given io and logger formatter.

```crystal
io = IO::Memory.new
Terminal.ui_logger(io, Logger::Formatter.new { |severity, datetime, progname, message, io|
  io << "VERBOSE" << datetime.to_s("%F") << message
})

Terminal.message "Welcome to use terminal-ui"
# => "VERBOSE 2017-10-22 Welcome to use terminal-ui"
```

## How to Contribute

Your contributions are always welcome! Please submit a pull request or create an issue to add a new question, bug or feature to the list.

All [Contributors](https://github.com/icyleaf/terminal-ui.cr/graphs/contributors) are on the wall.

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- [popcorn](https://github.com/icyleaf/popcorn) - Easy and Safe casting from one type to another.
- [fast-crystal](https://github.com/icyleaf/fast-crystal) - 💨 Writing Fast Crystal 😍 -- Collect Common Crystal idioms.

## License

[MIT License](https://github.com/icyleaf/terminal-ui.cr/blob/master/LICENSE) © icyleaf