Fix all lint and typecheck issues

.github/actions/javascript/authorChecklist/authorChecklist.ts

@@ -54,7 +54,7 @@ function partitionWithChecklist(body: string): string[] {
 async function getNumberOfItemsFromAuthorChecklist(): Promise<number> {
     const response = await fetch(pathToAuthorChecklist);
     const fileContents = await response.text();
-    const checklist = partitionWithChecklist(fileContents).at(1);
+    const checklist = partitionWithChecklist(fileContents).at(1) ?? '';
     const numberOfChecklistItems = (checklist.match(/\[ \]/g) ?? []).length;
     return numberOfChecklistItems;
 }

.github/actions/javascript/createOrUpdateStagingDeploy/createOrUpdateStagingDeploy.ts

@@ -30,6 +30,11 @@ async function run(): Promise<IssuesCreateResponse | void> {
         // Look at the state of the most recent StagingDeployCash,
         // if it is open then we'll update the existing one, otherwise, we'll create a new one.
         const mostRecentChecklist = recentDeployChecklists.at(0);
+
+        if (!mostRecentChecklist) {
+            return;
+        }
+
         const shouldCreateNewDeployChecklist = mostRecentChecklist.state !== 'open';
         const previousChecklist = shouldCreateNewDeployChecklist ? mostRecentChecklist : recentDeployChecklists.at(1);
         if (shouldCreateNewDeployChecklist) {
@@ -38,6 +43,10 @@ async function run(): Promise<IssuesCreateResponse | void> {
             console.log('Latest StagingDeployCash is open, updating it instead of creating a new one.', 'Current:', mostRecentChecklist, 'Previous:', previousChecklist);
         }
 
+        if (!previousChecklist) {
+            return;
+        }
+
         // Parse the data from the previous and current checklists into the format used to generate the checklist
         const previousChecklistData = GithubUtils.getStagingDeployCashData(previousChecklist);
         const currentChecklistData: StagingDeployCashData | undefined = shouldCreateNewDeployChecklist ? undefined : GithubUtils.getStagingDeployCashData(mostRecentChecklist);

.github/actions/javascript/markPullRequestsAsDeployed/markPullRequestsAsDeployed.ts

@@ -78,7 +78,7 @@ async function run() {
             labels: CONST.LABELS.STAGING_DEPLOY,
             state: 'closed',
         });
-        const previousChecklistID = deployChecklists.at(0).number;
+        const previousChecklistID = deployChecklists.at(0)?.number ?? 0;
 
         // who closed the last deploy checklist?
         const deployer = await GithubUtils.getActorWhoClosedIssue(previousChecklistID);

.github/actions/javascript/reviewerChecklist/reviewerChecklist.ts

@@ -55,16 +55,16 @@ function checkIssueForCompletedChecklist(numberOfChecklistItems: number) {
                 }
 
                 const whitespace = /([\n\r])/gm;
-                const comment = combinedComments.at(i).replace(whitespace, '');
+                const comment = combinedComments.at(i)?.replace(whitespace, '');
 
-                console.log(`Comment ${i} starts with: ${comment.slice(0, 20)}...`);
+                console.log(`Comment ${i} starts with: ${comment?.slice(0, 20)}...`);
 
                 // Found the reviewer checklist, so count how many completed checklist items there are
-                if (comment.indexOf(reviewerChecklistContains) !== -1) {
+                if (comment?.indexOf(reviewerChecklistContains) !== -1) {
                     console.log('Found the reviewer checklist!');
                     foundReviewerChecklist = true;
-                    numberOfFinishedChecklistItems = (comment.match(/- \[x\]/gi) ?? []).length;
-                    numberOfUnfinishedChecklistItems = (comment.match(/- \[ \]/g) ?? []).length;
+                    numberOfFinishedChecklistItems = (comment?.match(/- \[x\]/gi) ?? []).length;
+                    numberOfUnfinishedChecklistItems = (comment?.match(/- \[ \]/g) ?? []).length;
                 }
             }
 

.github/actions/javascript/validateReassureOutput/validateReassureOutput.ts

@@ -16,6 +16,11 @@ const run = (): boolean => {
 
     for (let i = 0; i < regressionOutput.countChanged.length; i++) {
         const measurement = regressionOutput.countChanged.at(i);
+
+        if (!measurement) {
+            continue;
+        }
+
         const baseline: PerformanceEntry = measurement.baseline;
         const current: PerformanceEntry = measurement.current;
 

.github/libs/GithubUtils.ts

@@ -168,7 +168,13 @@ class GithubUtils {
                     throw new Error(`Found more than one ${CONST.LABELS.STAGING_DEPLOY} issue.`);
                 }
 
-                return this.getStagingDeployCashData(data.at(0));
+                const issue = data.at(0);
+
+                if (!issue) {
+                    throw new Error(`Found an undefined ${CONST.LABELS.STAGING_DEPLOY} issue.`);
+                }
+
+                return this.getStagingDeployCashData(issue);
             });
     }
 
@@ -254,7 +260,7 @@ class GithubUtils {
         }
         internalQASection = internalQASection[1];
         const internalQAPRs = [...internalQASection.matchAll(new RegExp(`- \\[([ x])]\\s(${CONST.PULL_REQUEST_REGEX.source})`, 'g'))].map((match) => ({
-            url: match[2].split('-').at(0).trim(),
+            url: match[2].split('-').at(0)?.trim() ?? '',
             number: Number.parseInt(match[3], 10),
             isResolved: match[1] === 'x',
         }));
@@ -459,7 +465,7 @@ class GithubUtils {
                 repo: CONST.APP_REPO,
                 workflow_id: workflow,
             })
-            .then((response) => response.data.workflow_runs.at(0)?.id);
+            .then((response) => response.data.workflow_runs.at(0)?.id ?? -1);
     }
 
     /**

.github/scripts/createDocsRoutes.ts

@@ -94,7 +94,7 @@ function pushOrCreateEntry<TKey extends HubEntriesKey>(hubs: Hub[], hub: string,
 
 function getOrderFromArticleFrontMatter(path: string): number | undefined {
     const frontmatter = fs.readFileSync(path, 'utf8').split('---').at(1);
-    const frontmatterObject = yaml.load(frontmatter) as Record<string, unknown>;
+    const frontmatterObject = yaml.load(frontmatter ?? '') as Record<string, unknown>;
     return frontmatterObject.order as number | undefined;
 }
 

jest/setup.ts

@@ -34,7 +34,7 @@ jest.mock('react-native/Libraries/LogBox/LogBox', () => ({
 
 // Turn off the console logs for timing events. They are not relevant for unit tests and create a lot of noise
 jest.spyOn(console, 'debug').mockImplementation((...params: string[]) => {
-    if (params.at(0).startsWith('Timing:')) {
+    if (params.at(0)?.startsWith('Timing:')) {
         return;
     }
 

src/components/AttachmentPicker/index.native.tsx

@@ -366,8 +366,11 @@ function AttachmentPicker({type = CONST.ATTACHMENT_PICKER_TYPE.FILE, children, s
             if (focusedIndex === -1) {
                 return;
             }
-            selectItem(menuItemData.at(focusedIndex));
-            setFocusedIndex(-1); // Reset the focusedIndex on selecting any menu
+            const item = menuItemData.at(focusedIndex);
+            if (item) {
+                selectItem(item);
+                setFocusedIndex(-1); // Reset the focusedIndex on selecting any menu
+            }
         },
         {
             isActive: isVisible,

src/components/Attachments/AttachmentCarousel/index.native.tsx

@@ -52,9 +52,11 @@ function AttachmentCarousel({report, reportActions, parentReportActions, source,
                 setDownloadButtonVisibility(initialPage !== -1);
             }
 
+            const attachment = targetAttachments.at(initialPage);
+
             // Update the parent modal's state with the source and name from the mapped attachments
-            if (targetAttachments.at(initialPage) !== undefined && onNavigate) {
-                onNavigate(targetAttachments.at(initialPage));
+            if (attachment !== undefined && onNavigate) {
+                onNavigate(attachment);
             }
         }
         // eslint-disable-next-line react-compiler/react-compiler, react-hooks/exhaustive-deps
@@ -69,9 +71,11 @@ function AttachmentCarousel({report, reportActions, parentReportActions, source,
             const item = attachments.at(newPageIndex);
 
             setPage(newPageIndex);
-            setActiveSource(item.source);
+            if (item) {
+                setActiveSource(item.source);
+            }
 
-            if (onNavigate) {
+            if (onNavigate && item) {
                 onNavigate(item);
             }
         },

src/components/Attachments/AttachmentCarousel/index.tsx

@@ -100,9 +100,10 @@ function AttachmentCarousel({report, reportActions, parentReportActions, source,
                 setDownloadButtonVisibility(initialPage !== -1);
             }
 
+            const attachment = targetAttachments.at(initialPage);
             // Update the parent modal's state with the source and name from the mapped attachments
-            if (targetAttachments.at(initialPage) !== undefined && onNavigate) {
-                onNavigate(targetAttachments.at(initialPage));
+            if (attachment !== undefined && onNavigate) {
+                onNavigate(attachment);
             }
         }
     }, [report.privateNotes, reportActions, parentReportActions, compareImage, report.parentReportActionID, attachments, setDownloadButtonVisibility, onNavigate, accountID, type]);

src/components/Attachments/AttachmentView/AttachmentViewPdf/index.android.tsx

@@ -33,8 +33,8 @@ function AttachmentViewPdf(props: AttachmentViewPdfProps) {
         .manualActivation(true)
         .onTouchesMove((evt) => {
             if (offsetX.value !== 0 && offsetY.value !== 0 && isScrollEnabled) {
-                const translateX = Math.abs(evt.allTouches.at(0).absoluteX - offsetX.value);
-                const translateY = Math.abs(evt.allTouches.at(0).absoluteY - offsetY.value);
+                const translateX = Math.abs((evt.allTouches.at(0)?.absoluteX ?? 0) - offsetX.value);
+                const translateY = Math.abs((evt.allTouches.at(0)?.absoluteY ?? 0) - offsetY.value);
                 const allowEnablingScroll = !isPanGestureActive.value || isScrollEnabled.value;
 
                 // if the value of X is greater than Y and the pdf is not zoomed in,
@@ -49,8 +49,8 @@ function AttachmentViewPdf(props: AttachmentViewPdfProps) {
             }
 
             isPanGestureActive.value = true;
-            offsetX.value = evt.allTouches.at(0).absoluteX;
-            offsetY.value = evt.allTouches.at(0).absoluteY;
+            offsetX.value = evt.allTouches.at(0)?.absoluteX ?? 0;
+            offsetY.value = evt.allTouches.at(0)?.absoluteY ?? 0;
         })
         .onTouchesUp(() => {
             isPanGestureActive.value = false;

src/components/AvatarWithDisplayName.tsx

@@ -13,6 +13,7 @@ import CONST from '@src/CONST';
 import ONYXKEYS from '@src/ONYXKEYS';
 import ROUTES from '@src/ROUTES';
 import type {PersonalDetails, PersonalDetailsList, Policy, Report, ReportActions} from '@src/types/onyx';
+import fallbackIcon from '@src/utils/getDefaultIcon';
 import CaretWrapper from './CaretWrapper';
 import DisplayNames from './DisplayNames';
 import MultipleAvatars from './MultipleAvatars';
@@ -121,7 +122,7 @@ function AvatarWithDisplayName({
                         {shouldShowSubscriptAvatar ? (
                             <SubscriptAvatar
                                 backgroundColor={avatarBorderColor}
-                                mainAvatar={icons.at(0)}
+                                mainAvatar={icons.at(0) ?? fallbackIcon}
                                 secondaryAvatar={icons.at(1)}
                                 size={size}
                             />

src/components/ButtonWithDropdownMenu/index.tsx

@@ -83,9 +83,14 @@ function ButtonWithDropdownMenu<IValueType>({
                     setIsMenuVisible(!isMenuVisible);
                     return;
                 }
-                onPress(e, selectedItem?.value);
+                if (selectedItem?.value) {
+                    onPress(e, selectedItem?.value);
+                }
             } else {
-                onPress(e, options.at(0)?.value);
+                const option = options.at(0);
+                if (option?.value) {
+                    onPress(e, option?.value);
+                }
             }
         },
         {
@@ -103,8 +108,9 @@ function ButtonWithDropdownMenu<IValueType>({
                         success={success}
                         pressOnEnter={pressOnEnter}
                         ref={dropdownButtonRef}
-                        onPress={(event) => (!isSplitButton ? setIsMenuVisible(!isMenuVisible) : onPress(event, selectedItem.value))}
-                        text={customText ?? selectedItem.text}
+                        // eslint-disable-next-line no-nested-ternary
+                        onPress={(event) => (!isSplitButton ? setIsMenuVisible(!isMenuVisible) : selectedItem?.value ? onPress(event, selectedItem?.value) : undefined)}
+                        text={customText ?? selectedItem?.text ?? ''}
                         isDisabled={isDisabled || !!selectedItem?.disabled}
                         isLoading={isLoading}
                         shouldRemoveRightBorderRadius
@@ -150,11 +156,14 @@ function ButtonWithDropdownMenu<IValueType>({
                     success={success}
                     ref={buttonRef}
                     pressOnEnter={pressOnEnter}
-                    isDisabled={isDisabled || !!options.at(0).disabled}
+                    isDisabled={isDisabled || !!options.at(0)?.disabled}
                     style={[styles.w100, style]}
                     isLoading={isLoading}
-                    text={selectedItem.text}
-                    onPress={(event) => onPress(event, options.at(0).value)}
+                    text={selectedItem?.text}
+                    onPress={(event) => {
+                        const option = options.at(0);
+                        return option ? onPress(event, option.value) : undefined;
+                    }}
                     large={isButtonSizeLarge}
                     medium={!isButtonSizeLarge}
                     innerStyles={[innerStyleDropButton]}

src/components/Composer/index.native.tsx

@@ -92,9 +92,9 @@ function Composer(
             if (clipboardContent?.type === 'text/plain') {
                 return;
             }
-            const fileURI = clipboardContent.data;
-            const fileName = fileURI.split('/').pop();
-            const file: FileObject = {uri: fileURI, name: fileName, type: clipboardContent.type};
+            const fileURI = clipboardContent?.data;
+            const fileName = fileURI?.split('/').pop();
+            const file: FileObject = {uri: fileURI, name: fileName, type: clipboardContent?.type};
             onPasteFile(file);
         },
         [onPasteFile],

src/components/DatePicker/CalendarPicker/generateMonthMatrix.ts

@@ -50,9 +50,15 @@ export default function generateMonthMatrix(year: number, month: number) {
         matrix.push(currentWeek);
     }
 
+    const initial = matrix.at(0);
+
+    if (!initial) {
+        return;
+    }
+
     // Add null values for days before the first day of the month
-    for (let i = matrix.at(0).length; i < 7; i++) {
-        matrix.at(0).unshift(undefined);
+    for (let i = initial.length; i < 7; i++) {
+        initial.unshift(undefined);
     }
 
     return matrix;

src/components/DatePicker/CalendarPicker/index.tsx

@@ -208,7 +208,7 @@ function CalendarPicker({
                     </View>
                 ))}
             </View>
-            {calendarDaysMatrix.map((week) => (
+            {calendarDaysMatrix?.map((week) => (
                 <View
                     key={`week-${week.toString()}`}
                     style={themeStyles.flexRow}

src/components/EmojiPicker/EmojiPickerMenu/index.native.tsx

@@ -107,7 +107,7 @@ function EmojiPickerMenu({onEmojiSelected, activeEmoji}: EmojiPickerMenuProps, r
                         }
                         onEmojiSelected(emoji, item);
                     })}
-                    emoji={emojiCode}
+                    emoji={emojiCode ?? ''}
                     isHighlighted={shouldEmojiBeHighlighted}
                 />
             );

src/components/EmojiPicker/EmojiPickerMenu/index.tsx

@@ -154,7 +154,7 @@ function EmojiPickerMenu({onEmojiSelected, activeEmoji}: EmojiPickerMenuProps, r
                 }
                 if ('types' in item || 'name' in item) {
                     const emoji = typeof preferredSkinTone === 'number' && item?.types?.[preferredSkinTone] ? item?.types?.at(preferredSkinTone) : item.code;
-                    onEmojiSelected(emoji, item);
+                    onEmojiSelected(emoji ?? '', item);
                 }
                 // On web, avoid this Enter default input action; otherwise, it will add a new line in the subsequently focused composer.
                 keyBoardEvent.preventDefault();
@@ -280,7 +280,7 @@ function EmojiPickerMenu({onEmojiSelected, activeEmoji}: EmojiPickerMenuProps, r
                         }
                         setIsUsingKeyboardMovement(false);
                     }}
-                    emoji={emojiCode}
+                    emoji={emojiCode ?? ''}
                     onFocus={() => setFocusedIndex(index)}
                     isFocused={isEmojiFocused}
                     isHighlighted={shouldFirstEmojiBeHighlighted || shouldEmojiBeHighlighted}

src/components/HTMLEngineProvider/HTMLRenderers/MentionUserRenderer.tsx

@@ -60,15 +60,15 @@ function MentionUserRenderer({style, tnode, TDefaultRenderer, currentUserPersona
         const user = personalDetails[htmlAttribAccountID];
         accountID = parseInt(htmlAttribAccountID, 10);
         mentionDisplayText = LocalePhoneNumber.formatPhoneNumber(user?.login ?? '') || PersonalDetailsUtils.getDisplayNameOrDefault(user);
-        mentionDisplayText = getShortMentionIfFound(mentionDisplayText, htmlAttributeAccountID, user?.login ?? '');
+        mentionDisplayText = getShortMentionIfFound(mentionDisplayText, htmlAttributeAccountID, user?.login ?? '') ?? '';
         navigationRoute = ROUTES.PROFILE.getRoute(htmlAttribAccountID);
     } else if ('data' in tnodeClone && !isEmptyObject(tnodeClone.data)) {
         // We need to remove the LTR unicode and leading @ from data as it is not part of the login
         mentionDisplayText = tnodeClone.data.replace(CONST.UNICODE.LTR, '').slice(1);
         // We need to replace tnode.data here because we will pass it to TNodeChildrenRenderer below
-        asMutable(tnodeClone).data = tnodeClone.data.replace(mentionDisplayText, Str.removeSMSDomain(getShortMentionIfFound(mentionDisplayText, htmlAttributeAccountID)));
+        asMutable(tnodeClone).data = tnodeClone.data.replace(mentionDisplayText, Str.removeSMSDomain(getShortMentionIfFound(mentionDisplayText, htmlAttributeAccountID) ?? ''));
 
-        accountID = PersonalDetailsUtils.getAccountIDsByLogins([mentionDisplayText])?.at(0);
+        accountID = PersonalDetailsUtils.getAccountIDsByLogins([mentionDisplayText])?.at(0) ?? -1;
         navigationRoute = ROUTES.PROFILE.getRoute(accountID, undefined, mentionDisplayText);
         mentionDisplayText = Str.removeSMSDomain(mentionDisplayText);
     } else {

src/components/InteractiveStepSubHeader.tsx

@@ -70,7 +70,10 @@ function InteractiveStepSubHeader({stepNames, startStepIndex = 0, onStepSelected
                         return;
                     }
                     setCurrentStep(index);
-                    onStepSelected(stepNames.at(index));
+                    const step = stepNames.at(index);
+                    if (step) {
+                        onStepSelected(step);
+                    }
                 };
 
                 return (

src/components/LHNOptionsList/OptionRowLHN.tsx

@@ -31,6 +31,7 @@ import * as ReportActionContextMenu from '@pages/home/report/ContextMenu/ReportA
 import CONST from '@src/CONST';
 import ONYXKEYS from '@src/ONYXKEYS';
 import {isEmptyObject} from '@src/types/utils/EmptyObject';
+import fallbackIcon from '@src/utils/getDefaultIcon';
 import type {OptionRowLHNProps} from './types';
 
 function OptionRowLHN({reportID, isFocused = false, onSelectRow = () => {}, optionItem, viewMode = 'default', style, onLayout = () => {}, hasDraftComment}: OptionRowLHNProps) {
@@ -192,7 +193,7 @@ function OptionRowLHN({reportID, isFocused = false, onSelectRow = () => {}, opti
                                     (optionItem.shouldShowSubscript ? (
                                         <SubscriptAvatar
                                             backgroundColor={hovered && !isFocused ? hoveredBackgroundColor : subscriptAvatarBorderColor}
-                                            mainAvatar={optionItem.icons.at(0)}
+                                            mainAvatar={optionItem.icons.at(0) ?? fallbackIcon}
                                             secondaryAvatar={optionItem.icons.at(1)}
                                             size={isInFocusMode ? CONST.AVATAR_SIZE.SMALL : CONST.AVATAR_SIZE.DEFAULT}
                                         />