Added yargs, help and info options

2 files changed, 40 insertions, 22 deletions

diff --git a/bin/index.js b/bin/index.js
index e7339f4..f4167db 100644
--- a/bin/index.js
+++ b/bin/index.js
@@ -1,25 +1,16 @@
 #!/usr/bin/env node
+const infoMessage = require("./infoMessages");
+const yargs = require('yargs');
 
-const chalk = require("chalk");
-const boxen = require("boxen");
-const terminalLink = require('terminal-link');
-var packageInfo = require('./../package.json');
+const args = yargs.scriptName("calculator")
+    .usage('$0 [command] [args]')
+    .option("i", { alias: "info", describe: "Display information about the calculator" })
+    .option("h", { alias: "help" })
+    .option("v", { alias: "version" })
+    .help()
+    .strict()
+    .argv
 
-// If the command is run without any options we will show the about screen
-const terminalSupportedLink = `${chalk.blue.underline(terminalLink('here', packageInfo.homepage))}`;
-const terminalUnsupportedLink = `here: ${chalk.blue.underline(packageInfo.homepage)}`;
-const calculatorAboutMessage = `
-${chalk.white.bold('Calculator')} ${chalk.green.bold('v' + packageInfo.version)}
-Written by ${packageInfo.author} — available ${terminalLink.isSupported ? terminalSupportedLink : terminalUnsupportedLink}.
-Licensed under the ${packageInfo.license} License.
-
-Calculator, as the name suggests, is a Scientific Calculator which runs on the command line (CLI)
-of your device and is available for all major desktop operating systems. This program is open
-source and is written in JavaScript (NodeJS).
-
-For learning the usage run: ${chalk.green('calculator --help')} or ${chalk.green('calculator --h')}
-License Information: ${chalk.green('calculator --license')}
-Open Source Credis: ${chalk.green('calculator --credits')}
-`;
-
-console.log(boxen(calculatorAboutMessage, {padding: 1, borderColor: "green"}));
\ No newline at end of file
+if (args.info || Object.keys(args).length < 3) {
+    infoMessage.getIntroductoryMessage();
+}
diff --git a/bin/infoMessages.js b/bin/infoMessages.js
new file mode 100644
index 0000000..caab192
--- /dev/null
+++ b/bin/infoMessages.js
@@ -0,0 +1,27 @@
+const terminalLink = require('terminal-link');
+const boxen = require("boxen");
+const chalk = require("chalk");
+var packageInfo = require('./../package.json');
+
+module.exports = {
+    getIntroductoryMessage: () => {
+        // If the command is run without any options we will show the about screen
+        const terminalSupportedLink = `${chalk.blue.underline(terminalLink('here', packageInfo.homepage))}`;
+        const terminalUnsupportedLink = `here: ${chalk.blue.underline(packageInfo.homepage)}`;
+        const calculatorAboutMessage = `
+        ${chalk.white.bold('Calculator')} ${chalk.green.bold('v' + packageInfo.version)}
+        Written by ${packageInfo.author} — available ${terminalLink.isSupported ? terminalSupportedLink : terminalUnsupportedLink}.
+        Licensed under the ${packageInfo.license} License.
+    
+        Calculator, as the name suggests, is a Scientific Calculator which runs on the command line (CLI)
+        of your device and is available for all major desktop operating systems. This program is open
+        source and is written in JavaScript (NodeJS).
+    
+        For learning the usage run: ${chalk.green('calculator --help')} or ${chalk.green('calculator --h')}
+        License Information: ${chalk.green('calculator --license')}
+        Open Source Credis: ${chalk.green('calculator --credits')}
+        `;
+
+        console.log(boxen(calculatorAboutMessage, { padding: 1, borderColor: "green" }))
+    }
+}
\ No newline at end of file