aws-cdk
Version:
AWS CDK CLI, the command line tool for CDK apps
42 lines • 5.75 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.formatAsBanner = formatAsBanner;
// eslint-disable-next-line @typescript-eslint/no-require-imports
const stripAnsi = require('strip-ansi');
/**
* Returns a set of strings when printed on the console produces a banner msg. The message is in the following format -
* ********************
* *** msg line x ***
* *** msg line xyz ***
* ********************
*
* Spec:
* - The width of every line is equal, dictated by the longest message string
* - The first and last lines are '*'s for the full length of the line
* - Each line in between is prepended with '*** ' and appended with ' ***'
* - The text is indented left, i.e. whitespace is right-padded when the length is shorter than the longest.
*
* @param msgs - array of strings containing the message lines to be printed in the banner. Returns empty string if array
* is empty.
* @returns array of strings containing the message formatted as a banner
*/
function formatAsBanner(msgs) {
const printLen = (str) => stripAnsi(str).length;
if (msgs.length === 0) {
return [];
}
const leftPad = '*** ';
const rightPad = ' ***';
const bannerWidth = printLen(leftPad) + printLen(rightPad) +
msgs.reduce((acc, msg) => Math.max(acc, printLen(msg)), 0);
const bannerLines = [];
bannerLines.push('*'.repeat(bannerWidth));
// Improvement: If any 'msg' is wider than the terminal width, wrap message across lines.
msgs.forEach((msg) => {
const padding = ' '.repeat(bannerWidth - (printLen(msg) + printLen(leftPad) + printLen(rightPad)));
bannerLines.push(''.concat(leftPad, msg, padding, rightPad));
});
bannerLines.push('*'.repeat(bannerWidth));
return bannerLines;
}
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