1 files changed, 149 insertions, 0 deletions
diff --git a/node_modules/posthtml-match-helper/lib/index.js b/node_modules/posthtml-match-helper/lib/index.js
new file mode 100644
index 0000000..6e7ca64
--- /dev/null
+++ b/node_modules/posthtml-match-helper/lib/index.js
@@ -0,0 +1,149 @@
+const selectorReg = /^([^#\.\[]+)?(?:#([^\.\[]+))?(?:\.((?:[^\[\]\\]|\\.)+))?((?:\[[^\]]*\])+)?$/; // eslint-disable-line
+const attributeReg = /^([a-zA-Z0-9_-]*[^~|^$*!=])(?:([~|^$*!]?)=['"]?([^'"]*)['"]?)?$/;
+const splitReg = /\s*,\s*/;
+
+function expandMatcher(matcher) {
+  if (typeof matcher === "string") {
+    const match = matcher.match(selectorReg);
+
+    if (match) {
+      matcher = {};
+      const tag = match[1];
+      const id = match[2];
+      const className = match[3];
+      const attrs = match[4];
+      let attributes;
+
+      if (tag) {
+        matcher.tag = tag;
+      }
+
+      if (attrs) {
+        attributes = expandAttributes(attrs);
+      } else if (id || className) {
+        attributes = {};
+      }
+
+      if (id) {
+        attributes.id = id;
+      }
+
+      if (className) {
+        attributes.class = new RegExp(getCombinations(className.split(".")).map((order) => {
+          return "(?:^|\\s)" + order.join("\\s(?:.*?\\s)?") + "(?:\\s|$)";
+        }).join("|"));
+      }
+
+      if (attributes) {
+        matcher.attrs = attributes;
+      }
+    } else {
+      matcher = {tag: matcher};
+    }
+  }
+
+  return matcher;
+}
+
+function cssAttrToRegExp(value, operator) {
+  let reg;
+
+  switch (operator) {
+    case "~":
+      reg = "(?:^|\\s)" + value + "(?:\\s|$)";
+      break;
+
+    case "|":
+      reg = "^" + value + "(?:-|$)";
+      break;
+
+    case "^":
+      reg = "^" + value;
+      break;
+
+    case "$":
+      reg = value + "$";
+      break;
+
+    case "*":
+      reg = value;
+      break;
+
+    case "!":
+      reg = "^((?!" + value + ")[\\s\\S])*$";
+      break;
+
+    default:
+      reg = "^" + value + "$";
+      break;
+  }
+
+  return new RegExp(reg);
+}
+
+function expandAttributes(attrs) {
+  attrs = attrs.slice(1, -1);
+
+  if (attrs.length > 0) {
+    attrs = attrs.split("][");
+    const attrObject = {};
+    let l = attrs.length;
+    let attrMatch;
+    let name;
+    let operator;
+    let value;
+
+    while (l--) {
+      attrMatch = attrs[l].match(attributeReg);
+
+      if (attrMatch) {
+        name = attrMatch[1];
+        operator = attrMatch[2];
+        value = attrMatch[3];
+
+        if (!value) {
+          value = true;
+        }
+
+        attrObject[name] = (operator) ? cssAttrToRegExp(value, operator) : value;
+      }
+    }
+
+    return attrObject;
+  }
+}
+
+function getCombinations(values, subresult) {
+  subresult = subresult || [];
+  let result = [];
+
+  for (const value of values) {
+    if (subresult.indexOf(value) < 0) {
+      const _subresult = subresult.concat([value]);
+
+      if (_subresult.length < values.length) {
+        result = result.concat(getCombinations(values, _subresult));
+      } else {
+        result.push(_subresult);
+      }
+    }
+  }
+
+  return result;
+}
+
+export default function (matcher) {
+  if (typeof matcher === "string") {
+    if (matcher.match(splitReg)) {
+      matcher = matcher.split(splitReg);
+    } else {
+      return expandMatcher(matcher);
+    }
+  }
+
+  if (Array.isArray(matcher)) {
+    return matcher.map(expandMatcher);
+  }
+
+  return matcher;
+}