feat(rules): add ion-fab-attributes-renamed rule (#16)

Author: imhoffd

README.md

@@ -209,12 +209,14 @@ We are looking for contributors to help build these rules out! See [`CONTRIBUTIN
     </td>
   </tr>
   <tr>
-    <td></td>
-    <td>:white_large_square:</td>
+    <td>:wrench:</td>
+    <td>:white_check_mark:</td>
     <td>
-      <code>ion-fab-attributes-are-renamed</code>
+      <code>ion-fab-attributes-renamed</code>
+    </td>
+    <td>
+      <a href="https://github.com/dwieeb">@dwieeb</a>
     </td>
-    <td></td>
   </tr>
   <tr>
     <td></td>

src/ionFabAttributesRenamedRule.ts

@@ -0,0 +1,63 @@
+import * as ast from '@angular/compiler';
+import { NgWalker } from 'codelyzer/angular/ngWalker';
+import { BasicTemplateAstVisitor } from 'codelyzer/angular/templates/basicTemplateAstVisitor';
+import * as Lint from 'tslint';
+import { IOptions } from 'tslint';
+import * as ts from 'typescript';
+
+export const ruleName = 'ion-fab-attributes-renamed';
+
+function generateErrorMessage(attrName: string, replacement: string) {
+  return `The ${attrName} attribute of ion-fab has been renamed. Use ${replacement} instead.`;
+}
+
+const attrMap = new Map([
+  ['center', 'horizontal="center"'],
+  ['start', 'horizontal="start"'],
+  ['end', 'horizontal="end"'],
+  ['top', 'vertical="top"'],
+  ['bottom', 'vertical="bottom"'],
+  ['middle', 'vertical="center"']
+]);
+
+class IonFabAttributesRenamedTemplateVisitor extends BasicTemplateAstVisitor {
+  visitElement(element: ast.ElementAst, context: any): any {
+    if (element.name === 'ion-fab') {
+      for (const attr of element.attrs) {
+        const replacement = attrMap.get(attr.name);
+
+        if (replacement) {
+          const start = attr.sourceSpan.start.offset;
+          const length = attr.name.length;
+          const position = this.getSourcePosition(start);
+
+          this.addFailureAt(start, length, generateErrorMessage(attr.name, replacement), [
+            Lint.Replacement.replaceFromTo(position, position + length, replacement)
+          ]);
+        }
+      }
+    }
+
+    super.visitElement(element, context);
+  }
+}
+
+export class Rule extends Lint.Rules.AbstractRule {
+  public static metadata: Lint.IRuleMetadata = {
+    ruleName: ruleName,
+    type: 'functionality',
+    description: 'Attributes of ion-fab have been renamed.',
+    options: null,
+    optionsDescription: 'Not configurable.',
+    typescriptOnly: false,
+    hasFix: true
+  };
+
+  public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
+    return this.applyWithWalker(
+      new NgWalker(sourceFile, this.getOptions(), {
+        templateVisitorCtrl: IonFabAttributesRenamedTemplateVisitor
+      })
+    );
+  }
+}