ENH: model info display UI

Change-Id: I066c0e7f8ce87ec00b1141a1b44430444a819b42
(cherry picked from commit 05907a1a42da82737090d55046974d401f8af057)

resources/web/include/swiper/postinstall.js

@@ -0,0 +1,36 @@
+/* eslint-disable max-len -- for better formatting */
+var env = process.env;
+
+var ADBLOCK = is(env.ADBLOCK);
+var COLOR = is(env.npm_config_color);
+var DISABLE_OPENCOLLECTIVE = is(env.DISABLE_OPENCOLLECTIVE);
+var SILENT = ['silent', 'error', 'warn'].indexOf(env.npm_config_loglevel) !== -1;
+var OPEN_SOURCE_CONTRIBUTOR = is(env.OPEN_SOURCE_CONTRIBUTOR);
+
+// you could add a PR with an env variable for your CI detection
+var CI = [
+  'BUILD_NUMBER',
+  'CI',
+  'CONTINUOUS_INTEGRATION',
+  'DRONE',
+  'RUN_ID'
+].some(function (it) { return is(env[it]); });
+
+var BANNER = '\u001b[35m\u001b[1mLove Swiper? Support Vladimir\'s work by donating or pledging: \u001B[0m\n' +
+'\u001b[22m\u001b[39m\u001b[32m> On Patreon https://patreon.com/swiperjs \u001B[0m\n' +
+'\u001b[22m\u001b[39m\u001b[32m> On Open Collective https://opencollective.com/swiper';
+
+function is(it) {
+  return !!it && it !== '0' && it !== 'false';
+}
+
+function isBannerRequired() {
+  return !(ADBLOCK || CI || DISABLE_OPENCOLLECTIVE || SILENT || OPEN_SOURCE_CONTRIBUTOR);
+}
+
+function showBanner() {
+  // eslint-disable-next-line no-console,no-control-regex -- output
+  console.log(COLOR ? BANNER : BANNER.replace(/\u001B\[\d+m/g, ''));
+}
+
+if (isBannerRequired()) showBanner();