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backend/node_modules/postcss-minify-params/src/index.js

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+'use strict';
+const { dirname } = require('path');
+const browserslist = require('browserslist');
+const valueParser = require('postcss-value-parser');
+const { getArguments } = require('cssnano-utils');
+
+/**
+ * Return the greatest common divisor
+ * of two numbers.
+ *
+ * @param {number} a
+ * @param {number} b
+ * @return {number}
+ */
+function gcd(a, b) {
+  return b ? gcd(b, a % b) : a;
+}
+
+/**
+ * @param {number} a
+ * @param {number} b
+ * @return {[number, number]}
+ */
+function aspectRatio(a, b) {
+  const divisor = gcd(a, b);
+
+  return [a / divisor, b / divisor];
+}
+
+/**
+ * @param {valueParser.Node[]} args
+ * @return {string}
+ */
+function split(args) {
+  return args.map((arg) => valueParser.stringify(arg)).join('');
+}
+
+/**
+ * @param {valueParser.Node} node
+ * @return {void}
+ */
+function removeNode(node) {
+  node.value = '';
+  node.type = 'word';
+}
+
+/**
+ * @param {unknown[]} items
+ * @return {string}
+ */
+function sortAndDedupe(items) {
+  const a = [...new Set(items)];
+  a.sort();
+  return a.join();
+}
+
+/**
+ * @param {boolean} legacy
+ * @param {import('postcss').AtRule} rule
+ * @return {void}
+ */
+function transform(legacy, rule) {
+  const ruleName = rule.name.toLowerCase();
+
+  // We should re-arrange parameters only for `@media` and `@supports` at-rules
+  if (!rule.params || !['media', 'supports'].includes(ruleName)) {
+    return;
+  }
+
+  const params = valueParser(rule.params);
+
+  params.walk((node, index) => {
+    if (node.type === 'div') {
+      node.before = node.after = '';
+    } else if (node.type === 'function') {
+      node.before = '';
+      if (
+        node.nodes[0] &&
+        node.nodes[0].type === 'word' &&
+        node.nodes[0].value.startsWith('--') &&
+        node.nodes[2] === undefined
+      ) {
+        node.after = ' ';
+      } else {
+        node.after = '';
+      }
+      if (
+        node.nodes[4] &&
+        node.nodes[0].value.toLowerCase().indexOf('-aspect-ratio') === 3
+      ) {
+        const [a, b] = aspectRatio(
+          Number(node.nodes[2].value),
+          Number(node.nodes[4].value)
+        );
+
+        node.nodes[2].value = a.toString();
+        node.nodes[4].value = b.toString();
+      }
+    } else if (node.type === 'space') {
+      node.value = ' ';
+    } else {
+      const prevWord = params.nodes[index - 2];
+
+      if (
+        node.value.toLowerCase() === 'all' &&
+        rule.name.toLowerCase() === 'media' &&
+        !prevWord
+      ) {
+        const nextWord = params.nodes[index + 2];
+
+        if (!legacy || nextWord) {
+          removeNode(node);
+        }
+
+        if (nextWord && nextWord.value.toLowerCase() === 'and') {
+          const nextSpace = params.nodes[index + 1];
+          const secondSpace = params.nodes[index + 3];
+
+          removeNode(nextWord);
+          removeNode(nextSpace);
+          removeNode(secondSpace);
+        }
+      }
+    }
+  }, true);
+
+  rule.params = sortAndDedupe(getArguments(params).map(split));
+
+  if (!rule.params.length) {
+    rule.raws.afterName = '';
+  }
+}
+
+const allBugBrowers = new Set(['ie 10', 'ie 11']);
+
+/**
+ * @typedef {{ overrideBrowserslist?: string | string[] }} AutoprefixerOptions
+ * @typedef {Pick<browserslist.Options, 'stats' | 'path' | 'env'>} BrowserslistOptions
+ * @typedef {AutoprefixerOptions & BrowserslistOptions} Options
+ */
+
+/**
+ * @type {import('postcss').PluginCreator<Options>}
+ * @param {Options} options
+ * @return {import('postcss').Plugin}
+ */
+function pluginCreator(options = {}) {
+  return {
+    postcssPlugin: 'postcss-minify-params',
+
+    /**
+     * @param {import('postcss').Result & {opts: BrowserslistOptions & {file?: string}}} result
+     */
+    prepare(result) {
+      const { stats, env, from, file } = result.opts || {};
+      const browsers = browserslist(options.overrideBrowserslist, {
+        stats: options.stats || stats,
+        path: options.path || dirname(from || file || __filename),
+        env: options.env || env,
+      });
+
+      const hasAllBug = browsers.some((browser) => allBugBrowers.has(browser));
+
+      return {
+        OnceExit(css) {
+          css.walkAtRules((rule) => transform(hasAllBug, rule));
+        },
+      };
+    },
+  };
+}
+
+pluginCreator.postcss = true;
+module.exports = pluginCreator;