--- /dev/null
+/**
+ * @fileoverview An object that creates fix commands for rules.
+ * @author Nicholas C. Zakas
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+// none!
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Creates a fix command that inserts text at the specified index in the source text.
+ * @param {int} index The 0-based index at which to insert the new text.
+ * @param {string} text The text to insert.
+ * @returns {Object} The fix command.
+ * @private
+ */
+function insertTextAt(index, text) {
+ return {
+ range: [index, index],
+ text
+ };
+}
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+/**
+ * Creates code fixing commands for rules.
+ */
+
+const ruleFixer = Object.freeze({
+
+ /**
+ * Creates a fix command that inserts text after the given node or token.
+ * The fix is not applied until applyFixes() is called.
+ * @param {ASTNode|Token} nodeOrToken The node or token to insert after.
+ * @param {string} text The text to insert.
+ * @returns {Object} The fix command.
+ */
+ insertTextAfter(nodeOrToken, text) {
+ return this.insertTextAfterRange(nodeOrToken.range, text);
+ },
+
+ /**
+ * Creates a fix command that inserts text after the specified range in the source text.
+ * The fix is not applied until applyFixes() is called.
+ * @param {int[]} range The range to replace, first item is start of range, second
+ * is end of range.
+ * @param {string} text The text to insert.
+ * @returns {Object} The fix command.
+ */
+ insertTextAfterRange(range, text) {
+ return insertTextAt(range[1], text);
+ },
+
+ /**
+ * Creates a fix command that inserts text before the given node or token.
+ * The fix is not applied until applyFixes() is called.
+ * @param {ASTNode|Token} nodeOrToken The node or token to insert before.
+ * @param {string} text The text to insert.
+ * @returns {Object} The fix command.
+ */
+ insertTextBefore(nodeOrToken, text) {
+ return this.insertTextBeforeRange(nodeOrToken.range, text);
+ },
+
+ /**
+ * Creates a fix command that inserts text before the specified range in the source text.
+ * The fix is not applied until applyFixes() is called.
+ * @param {int[]} range The range to replace, first item is start of range, second
+ * is end of range.
+ * @param {string} text The text to insert.
+ * @returns {Object} The fix command.
+ */
+ insertTextBeforeRange(range, text) {
+ return insertTextAt(range[0], text);
+ },
+
+ /**
+ * Creates a fix command that replaces text at the node or token.
+ * The fix is not applied until applyFixes() is called.
+ * @param {ASTNode|Token} nodeOrToken The node or token to remove.
+ * @param {string} text The text to insert.
+ * @returns {Object} The fix command.
+ */
+ replaceText(nodeOrToken, text) {
+ return this.replaceTextRange(nodeOrToken.range, text);
+ },
+
+ /**
+ * Creates a fix command that replaces text at the specified range in the source text.
+ * The fix is not applied until applyFixes() is called.
+ * @param {int[]} range The range to replace, first item is start of range, second
+ * is end of range.
+ * @param {string} text The text to insert.
+ * @returns {Object} The fix command.
+ */
+ replaceTextRange(range, text) {
+ return {
+ range,
+ text
+ };
+ },
+
+ /**
+ * Creates a fix command that removes the node or token from the source.
+ * The fix is not applied until applyFixes() is called.
+ * @param {ASTNode|Token} nodeOrToken The node or token to remove.
+ * @returns {Object} The fix command.
+ */
+ remove(nodeOrToken) {
+ return this.removeRange(nodeOrToken.range);
+ },
+
+ /**
+ * Creates a fix command that removes the specified range of text from the source.
+ * The fix is not applied until applyFixes() is called.
+ * @param {int[]} range The range to remove, first item is start of range, second
+ * is end of range.
+ * @returns {Object} The fix command.
+ */
+ removeRange(range) {
+ return {
+ range,
+ text: ""
+ };
+ }
+
+});
+
+
+module.exports = ruleFixer;