Add fixer for sort-prop-types

Author: Finn Pauls

docs/rules/sort-prop-types.md

@@ -2,6 +2,9 @@
 
 Some developers prefer to sort propTypes declarations alphabetically to be able to find necessary declaration easier at the later time. Others feel that it adds complexity and becomes burden to maintain.
 
+**Fixable:** This rule is automatically fixable using the `--fix` flag on the command line.
+
+
 ## Rule Details
 
 This rule checks all components and verifies that all propTypes declarations are sorted alphabetically. A spread attribute resets the verification. The default configuration of the rule is case-sensitive.

lib/rules/sort-prop-types.js

@@ -20,6 +20,8 @@ module.exports = {
       url: docsUrl('sort-prop-types')
     },
 
+    fixable: 'code',
+
     schema: [{
       type: 'object',
       properties: {
@@ -71,6 +73,46 @@ module.exports = {
       );
     }
 
+    function getShapeProperties (node) {
+      return node.arguments && node.arguments[0] && node.arguments[0].properties;
+    }
+
+    function sorter(a, b) {
+      let aKey = getKey(a);
+      let bKey = getKey(b);
+      if (requiredFirst) {
+        if (isRequiredProp(a) && !isRequiredProp(b)) {
+          return -1;
+        }
+        if (!isRequiredProp(a) && isRequiredProp(b)) {
+          return 1;
+        }
+      }
+
+      if (callbacksLast) {
+        if (isCallbackPropName(aKey) && !isCallbackPropName(bKey)) {
+          return 1;
+        }
+        if (!isCallbackPropName(aKey) && isCallbackPropName(bKey)) {
+          return -1;
+        }
+      }
+
+      if (ignoreCase) {
+        aKey = aKey.toLowerCase();
+        bKey = bKey.toLowerCase();
+      }
+
+      if (aKey < bKey) {
+        return -1;
+      }
+      if (aKey > bKey) {
+        return 1;
+      }
+      return 0;
+    }
+
+
     /**
      * Checks if propTypes declarations are sorted
      * @param {Array} declarations The array of AST nodes being checked.
@@ -83,6 +125,48 @@ module.exports = {
         return;
       }
 
+      function fix(fixer) {
+        function sortInSource(allNodes, source) {
+          const originalSource = source;
+          const nodeGroups = allNodes.reduce((acc, curr) => {
+            if (curr.type === 'ExperimentalSpreadProperty' || curr.type === 'SpreadElement') {
+              acc.push([]);
+            } else {
+              acc[acc.length - 1].push(curr);
+            }
+            return acc;
+          }, [[]]);
+
+          nodeGroups.forEach(nodes => {
+            const sortedAttributes = nodes.slice().sort(sorter);
+
+            for (let i = nodes.length - 1; i >= 0; i--) {
+              const sortedAttr = sortedAttributes[i];
+              const attr = nodes[i];
+              let sortedAttrText = sourceCode.getText(sortedAttr);
+              if (sortShapeProp && isShapeProp(sortedAttr.value)) {
+                const shape = getShapeProperties(sortedAttr.value);
+                if (shape) {
+                  const attrSource = sortInSource(
+                    shape,
+                    originalSource
+                  );
+                  sortedAttrText = attrSource.slice(sortedAttr.range[0], sortedAttr.range[1]);
+                }
+              }
+              source = `${source.slice(0, attr.range[0])}${sortedAttrText}${source.slice(attr.range[1])}`;
+            }
+          });
+          return source;
+        }
+
+        const source = sortInSource(declarations, context.getSourceCode().getText());
+
+        const rangeStart = declarations[0].range[0];
+        const rangeEnd = declarations[declarations.length - 1].range[1];
+        return fixer.replaceTextRange([rangeStart, rangeEnd], source.slice(rangeStart, rangeEnd));
+      }
+
       declarations.reduce((prev, curr, idx, decls) => {
         if (curr.type === 'ExperimentalSpreadProperty' || curr.type === 'SpreadElement') {
           return decls[idx + 1];
@@ -109,7 +193,8 @@ module.exports = {
             // Encountered a non-required prop after a required prop
             context.report({
               node: curr,
-              message: 'Required prop types must be listed before all other prop types'
+              message: 'Required prop types must be listed before all other prop types',
+              fix
             });
             return curr;
           }
@@ -124,7 +209,8 @@ module.exports = {
             // Encountered a non-callback prop after a callback prop
             context.report({
               node: prev,
-              message: 'Callback prop types must be listed after all other prop types'
+              message: 'Callback prop types must be listed after all other prop types',
+              fix
             });
             return prev;
           }
@@ -133,7 +219,8 @@ module.exports = {
         if (currentPropName < prevPropName) {
           context.report({
             node: curr,
-            message: 'Prop types declarations should be sorted alphabetically'
+            message: 'Prop types declarations should be sorted alphabetically',
+            fix
           });
           return prev;
         }