--- /dev/null
+"use strict";
+
+const _ = require("lodash");
+const declarationValueIndex = require("../../utils/declarationValueIndex");
+const keywordSets = require("../../reference/keywordSets");
+const postcss = require("postcss");
+const report = require("../../utils/report");
+const ruleMessages = require("../../utils/ruleMessages");
+const validateOptions = require("../../utils/validateOptions");
+const valueParser = require("postcss-value-parser");
+
+const ruleName = "time-min-milliseconds";
+
+const messages = ruleMessages(ruleName, {
+ expected: time => `Expected a minimum of ${time} milliseconds`
+});
+
+const rule = function(minimum) {
+ return (root, result) => {
+ const validOptions = validateOptions(result, ruleName, {
+ actual: minimum,
+ possible: _.isNumber
+ });
+ if (!validOptions) {
+ return;
+ }
+
+ root.walkDecls(decl => {
+ const propertyName = postcss.vendor.unprefixed(decl.prop.toLowerCase());
+
+ if (
+ keywordSets.longhandTimeProperties.has(propertyName) &&
+ !isAcceptableTime(decl.value)
+ ) {
+ complain(decl);
+ }
+
+ if (keywordSets.shorthandTimeProperties.has(propertyName)) {
+ const valueList = postcss.list.space(decl.value);
+
+ for (const value of valueList) {
+ if (!isAcceptableTime(value)) {
+ complain(decl, decl.value.indexOf(value));
+ }
+ }
+ }
+ });
+
+ function isAcceptableTime(time) {
+ const parsedTime = valueParser.unit(time);
+
+ if (!parsedTime) return true;
+
+ if (parsedTime.number <= 0) {
+ return true;
+ }
+
+ if (
+ parsedTime.unit.toLowerCase() === "ms" &&
+ parsedTime.number < minimum
+ ) {
+ return false;
+ }
+
+ if (
+ parsedTime.unit.toLowerCase() === "s" &&
+ parsedTime.number * 1000 < minimum
+ ) {
+ return false;
+ }
+
+ return true;
+ }
+
+ function complain(decl, offset) {
+ offset = offset || 0;
+
+ report({
+ result,
+ ruleName,
+ message: messages.expected(minimum),
+ index: declarationValueIndex(decl) + offset,
+ node: decl
+ });
+ }
+ };
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;