Resolved "already declared in upper scope" linting warnings

no issue

- fixed all `no-shadow` linter warnings
- changed `no-shadow` eslint rule from `warn` to `error` so we don't re-introduce shadowed variables in the future

.eslintrc.js

@@ -16,6 +16,8 @@ module.exports = {
         'plugin:ghost/ember'
     ],
     rules: {
+        'no-shadow': ['error'],
+
         // octane 🏎
         'ghost/ember/classic-decorator-hooks': 'error',
         'ghost/ember/classic-decorator-no-classic-methods': 'error',

lib/koenig-editor/addon/components/koenig-card-embed.js

@@ -274,7 +274,7 @@ export default Component.extend({
             mutations.forEach(addImageLoadListeners);
         }
 
-        function createMutationObserver(target) {
+        function createMutationObserver(mutationTarget) {
             let config = {
                 attributes: true,
                 attributeOldValue: false,
@@ -285,7 +285,7 @@ export default Component.extend({
             };
 
             let observer = new MutationObserver(mutationObserved);
-            observer.observe(target, config); // eslint-disable-line ghost/ember/no-observers
+            observer.observe(mutationTarget, config); // eslint-disable-line ghost/ember/no-observers
             return observer;
         }
 

lib/koenig-editor/addon/components/koenig-card.js

@@ -372,14 +372,14 @@ export default Component.extend({
             mutations.forEach(addInputFocusListeners);
         }
 
-        function createMutationObserver(target) {
+        function createMutationObserver(mutationTarget) {
             let config = {
                 childList: true,
                 subtree: true
             };
 
             let observer = new MutationObserver(mutationObserved);
-            observer.observe(target, config); // eslint-disable-line ghost/ember/no-observers
+            observer.observe(mutationTarget, config); // eslint-disable-line ghost/ember/no-observers
             return observer;
         }
 

lib/koenig-editor/addon/components/koenig-editor.js

@@ -515,14 +515,14 @@ export default Component.extend({
                 return;
             }
 
-            let operation = function (postEditor) {
+            let operation = function (operationPostEditor) {
                 // strip all formatting aside from links
-                postEditor.removeMarkupFromRange(
+                operationPostEditor.removeMarkupFromRange(
                     editor.activeSection.toRange(),
                     m => m.tagName !== 'a'
                 );
 
-                postEditor.toggleSection(headingTagName);
+                operationPostEditor.toggleSection(headingTagName);
             };
 
             this._performEdit(operation, postEditor);
@@ -670,7 +670,7 @@ export default Component.extend({
 
             if (typeof shouldDelete === 'string') {
                 let payloadKey = shouldDelete;
-                shouldDelete = card => isBlank(get(card, payloadKey));
+                shouldDelete = cardToDelete => isBlank(get(cardToDelete, payloadKey));
             }
 
             if (shouldDelete(card)) {
@@ -1212,8 +1212,8 @@ export default Component.extend({
         if (postEditor) {
             editOperation(postEditor);
         } else {
-            this.editor.run((postEditor) => {
-                editOperation(postEditor);
+            this.editor.run((operationPostEditor) => {
+                editOperation(operationPostEditor);
             });
         }
     },

lib/koenig-editor/addon/components/koenig-slash-menu.js

@@ -294,7 +294,7 @@ export default Component.extend({
         }
 
         for (let section of sections) {
-            let item = section.items.find(item => item.selected);
+            let item = section.items.find(sectionItem => sectionItem.selected);
             if (item) {
                 return item;
             }

lib/koenig-editor/addon/lib/clean-text-replacement-html.js

@@ -9,9 +9,9 @@ export default function cleanTextReplacementHtml(html = '', _options = {}) {
             throw new Error('cleanTextReplacementHtml() must be passed a `createDocument` function as an option when used in a non-browser environment');
         }
 
-        options.createDocument = function (html) {
+        options.createDocument = function (documentHtml) {
             const parser = new Parser();
-            return parser.parseFromString(html, 'text/html');
+            return parser.parseFromString(documentHtml, 'text/html');
         };
     }
 

lib/koenig-editor/addon/options/key-commands.js

@@ -182,7 +182,7 @@ export const DEFAULT_KEY_COMMANDS = [{
             let hasReversed = false;
             specialMarkupTagNames.forEach((tagName) => {
                 // only continue if we're about to delete a special markup
-                let markup = marker.markups.find(markup => markup.tagName.toUpperCase() === tagName);
+                let markup = marker.markups.find(markerMarkup => markerMarkup.tagName.toUpperCase() === tagName);
                 if (markup) {
                     let nextMarker = head.markerIn(1);
                     // ensure we're at the end of the markup not inside it
@@ -197,7 +197,7 @@ export const DEFAULT_KEY_COMMANDS = [{
                                 markdown = markdown.char;
                             }
 
-                            let range = editor.range.expandByMarker(marker => !!marker.markups.includes(markup));
+                            let range = editor.range.expandByMarker(markerToExpand => !!markerToExpand.markups.includes(markup));
 
                             // replaced markdown (default) will have chars removed when formatted
                             // and added back when the format is removed by backspace

lib/koenig-editor/addon/services/koenig-drag-drop-handler.js

@@ -230,8 +230,7 @@ export default Service.extend({
         this.set('isDragging', true);
         utils.applyUserSelect(document.body, 'none');
 
-        let container = this.sourceContainer;
-        let draggableInfo = container.getDraggableInfo(this.grabbedElement);
+        let draggableInfo = this.sourceContainer.getDraggableInfo(this.grabbedElement);
 
         if (!draggableInfo) {
             this._resetDrag();
@@ -261,7 +260,7 @@ export default Service.extend({
 
         // create the ghost element and cache it's position so avoid costly
         // getBoundingClientRect calls in the mousemove handler
-        let ghostElement = container.createGhostElement(this.draggableInfo);
+        let ghostElement = this.sourceContainer.createGhostElement(this.draggableInfo);
         if (ghostElement && ghostElement instanceof HTMLElement) {
             this._ghostContainerElement.appendChild(ghostElement);
             let ghostElementRect = ghostElement.getBoundingClientRect();

mirage/config/pages.js

@@ -78,11 +78,11 @@ export default function mockPages(server) {
 
         let statusFilter = extractFilterParam('status', filter);
 
-        let collection = pages.all().filter((page) => {
+        let collection = pages.all().filter((pageModel) => {
             let matchesStatus = true;
 
             if (!isEmpty(statusFilter)) {
-                matchesStatus = statusFilter.includes(page.status);
+                matchesStatus = statusFilter.includes(pageModel.status);
             }
 
             return matchesStatus;