chore: type getLanguageMap

- remove undefined.csv error

src/getLanguageMap.ts

@@ -14,19 +14,25 @@ const { splitCsvLine } = require('../scripts/helpers');
 
 const VALENTINES_DAY = 1644796800000;
 
-async function getLanguageMap(code, isDevelopment = false) {
+type Translation = { translation: string; context?: string };
+type TranslationMap = Record<string, Translation>;
+
+export async function getLanguageMap(
+  code: string,
+  isDevelopment: boolean = false
+): Promise<TranslationMap> {
   const contents = await getContents(code, isDevelopment);
   return getMapFromContents(contents);
 }
 
-async function getContents(code, isDevelopment) {
+async function getContents(code: string, isDevelopment: boolean) {
   if (isDevelopment) {
     const filePath = path.resolve('translations', `${code}.csv`);
     const contents = await fs.readFile(filePath, { encoding: 'utf-8' });
     return ['', contents].join('\n');
   }
 
-  let contents = await getContentsIfExists();
+  let contents = await getContentsIfExists(code);
   if (contents.length === 0) {
     contents = (await fetchAndStoreFile(code)) ?? contents;
   } else {
@@ -40,31 +46,31 @@ async function getContents(code, isDevelopment) {
   return contents;
 }
 
-function getMapFromContents(contents) {
-  contents = contents.split('\n').slice(1);
-  return contents
-    .map(splitCsvLine)
+function getMapFromContents(contents: string): TranslationMap {
+  const lines: string[] = contents.split('\n').slice(1);
+  return lines
+    .map((l) => splitCsvLine(l) as string[])
     .filter((l) => l.length >= 2)
     .reduce((acc, l) => {
       const key = l[0].slice(1, -1);
       const translation = l[1].slice(1, -1);
       acc[key] = { translation };
 
-      const context = l.slice(2);
-      if (context.length) {
-        acc.context = context;
+      const context = l.slice(2)[0];
+      if (context?.length) {
+        acc[key].context = context;
       }
 
       return acc;
-    }, {});
+    }, {} as TranslationMap);
 }
 
-async function getContentsIfExists(code) {
+async function getContentsIfExists(code: string): Promise<string> {
   const filePath = getFilePath(code);
   try {
     return await fs.readFile(filePath, { encoding: 'utf-8' });
   } catch (err) {
-    if (err.errno !== -2) {
+    if ((err as NodeJS.ErrnoException).code !== 'ENOENT') {
       throw err;
     }
 
@@ -72,12 +78,12 @@ async function getContentsIfExists(code) {
   }
 }
 
-async function fetchAndStoreFile(code, date) {
+async function fetchAndStoreFile(code: string, date?: Date) {
   let res = await fetch(
     `https://api.github.com/repos/frappe/books/contents/translations/${code}.csv`
   );
 
-  let contents = undefined;
+  let contents: string | undefined = undefined;
   if (res.status === 200) {
     const resJson = await res.json();
     contents = Buffer.from(resJson.content, 'base64').toString();
@@ -96,14 +102,14 @@ async function fetchAndStoreFile(code, date) {
   }
 
   if (contents) {
-    contents = [date.toISOString(), contents].join('\n');
+    contents = [date!.toISOString(), contents].join('\n');
     await storeFile(code, contents);
   }
   return contents;
 }
 
-async function getUpdatedContent(code, contents) {
-  const [shouldUpdate, date] = await shouldUpdateFile(code, contents);
+async function getUpdatedContent(code: string, contents: string) {
+  const { shouldUpdate, date } = await shouldUpdateFile(code, contents);
   if (!shouldUpdate) {
     return contents;
   }
@@ -111,17 +117,17 @@ async function getUpdatedContent(code, contents) {
   return await fetchAndStoreFile(code, date);
 }
 
-async function shouldUpdateFile(code, contents) {
+async function shouldUpdateFile(code: string, contents: string) {
   const date = await getLastUpdated(code);
   const oldDate = new Date(contents.split('\n')[0]);
   const shouldUpdate = date > oldDate || +oldDate === VALENTINES_DAY;
 
-  return [shouldUpdate, date];
+  return { shouldUpdate, date };
 }
 
-async function getLastUpdated(code) {
+async function getLastUpdated(code: string): Promise<Date> {
   const url = `https://api.github.com/repos/frappe/books/commits?path=translations%2F${code}.csv&page=1&per_page=1`;
-  const resJson = await fetch(url).then((res) => res.json());
+  const resJson = await fetch(url).then((res: Response) => res.json());
 
   try {
     return new Date(resJson[0].commit.author.date);
@@ -130,19 +136,17 @@ async function getLastUpdated(code) {
   }
 }
 
-function getFilePath(code) {
+function getFilePath(code: string) {
   return path.resolve(process.resourcesPath, 'translations', `${code}.csv`);
 }
 
-function throwCouldNotFetchFile(code) {
+function throwCouldNotFetchFile(code: string) {
   throw new Error(`Could not fetch translations for '${code}'.`);
 }
 
-async function storeFile(code, contents) {
+async function storeFile(code: string, contents: string) {
   const filePath = getFilePath(code);
   const dirname = path.dirname(filePath);
   await fs.mkdir(dirname, { recursive: true });
   await fs.writeFile(filePath, contents, { encoding: 'utf-8' });
 }
-
-module.exports = { getLanguageMap };