fix lint error, move helper methods to char and token files

packages/bbob-parser/token.js

@@ -1,3 +1,10 @@
+const {
+  getChar,
+  OPEN_BRAKET,
+  CLOSE_BRAKET,
+  SLASH,
+} = require('./char');
+
 const TOKEN_TYPE_ID = 0;
 const TOKEN_VALUE_ID = 1;
 const TOKEN_COLUMN_ID = 2;
@@ -10,6 +17,43 @@ const TOKEN_TYPE_ATTR_VALUE = 'attr-value';
 const TOKEN_TYPE_SPACE = 'space';
 const TOKEN_TYPE_NEW_LINE = 'new-line';
 
+const getTokenValue = token => token[TOKEN_VALUE_ID];
+const getTokenLine = token => token[TOKEN_LINE_ID];
+const getTokenColumn = token => token[TOKEN_COLUMN_ID];
+
+const isTextToken = (token) => {
+  const type = token[TOKEN_TYPE_ID];
+
+  return type === TOKEN_TYPE_SPACE || type === TOKEN_TYPE_NEW_LINE || type === TOKEN_TYPE_WORD;
+};
+
+const isTagToken = token => token[TOKEN_TYPE_ID] === TOKEN_TYPE_TAG;
+const isTagEnd = token => getTokenValue(token).charCodeAt(0) === SLASH;
+const isTagStart = token => !isTagEnd(token);
+const isAttrNameToken = token => token[TOKEN_TYPE_ID] === TOKEN_TYPE_ATTR_NAME;
+const isAttrValueToken = token => token[TOKEN_TYPE_ID] === TOKEN_TYPE_ATTR_VALUE;
+
+const getTagName = (token) => {
+  const value = getTokenValue(token);
+
+  return isTagEnd(token) ? value.slice(1) : value;
+};
+
+
+const convertTagToText = (token) => {
+  let text = getChar(OPEN_BRAKET);
+
+  if (isTagEnd(token)) {
+    text += getChar(SLASH);
+  }
+
+  text += getTokenValue(token);
+  text += getChar(CLOSE_BRAKET);
+
+  return text;
+};
+
+
 module.exports = {
   TYPE_ID: TOKEN_TYPE_ID,
   VALUE_ID: TOKEN_VALUE_ID,
@@ -20,5 +64,16 @@ module.exports = {
   TYPE_ATTR_NAME: TOKEN_TYPE_ATTR_NAME,
   TYPE_ATTR_VALUE: TOKEN_TYPE_ATTR_VALUE,
   TYPE_SPACE: TOKEN_TYPE_SPACE,
-  TYPE_NEW_LINE: TOKEN_TYPE_NEW_LINE
+  TYPE_NEW_LINE: TOKEN_TYPE_NEW_LINE,
+  convertTagToText,
+  getTagName,
+  getTokenColumn,
+  getTokenLine,
+  getTokenValue,
+  isAttrNameToken,
+  isAttrValueToken,
+  isTagStart,
+  isTagToken,
+  isTextToken,
+  isTagEnd,
 };