Update devDeps

package.json

@@ -41,22 +41,21 @@
     "pako": "^1.0.11"
   },
   "devDependencies": {
-    "@types/es6-promisify": "^6.0.0",
-    "@types/jest": "^29.5.2",
-    "@types/long": "^4.0.1",
-    "@types/node": "^18.11.16",
-    "@types/pako": "^2.0.0",
-    "@typescript-eslint/eslint-plugin": "^5.59.9",
-    "@typescript-eslint/parser": "^5.59.9",
-    "eslint": "^8.42.0",
-    "eslint-config-prettier": "^8.8.0",
-    "eslint-plugin-import": "^2.27.5",
-    "eslint-plugin-prettier": "^4.2.1",
-    "jest": "^29.5.0",
-    "prettier": "^2.8.8",
-    "rimraf": "^5.0.1",
-    "ts-jest": "^29.1.0",
-    "typescript": "^5.1.3"
+    "@types/es6-promisify": "^6.0.2",
+    "@types/jest": "^29.5.5",
+    "@types/node": "^20.8.5",
+    "@types/pako": "^2.0.1",
+    "@typescript-eslint/eslint-plugin": "^6.7.5",
+    "@typescript-eslint/parser": "^6.7.5",
+    "eslint": "^8.51.0",
+    "eslint-config-prettier": "^9.0.0",
+    "eslint-plugin-import": "^2.28.1",
+    "eslint-plugin-prettier": "^5.0.1",
+    "jest": "^29.7.0",
+    "prettier": "^3.0.3",
+    "rimraf": "^5.0.5",
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.2.2"
   },
   "publishConfig": {
     "access": "public"

src/bgzFilehandle.ts

@@ -1,11 +1,15 @@
 import { Buffer } from 'buffer'
-import { LocalFile, GenericFilehandle } from 'generic-filehandle'
+import {
+  LocalFile,
+  GenericFilehandle,
+  FilehandleOptions,
+} from 'generic-filehandle'
 
 // locals
 import { unzip } from './unzip'
 import GziIndex from './gziIndex'
 
-export default class BgzFilehandle {
+export default class BgzFilehandle implements GenericFilehandle {
   filehandle: GenericFilehandle
   gzi: GziIndex
 
@@ -131,4 +135,37 @@ export default class BgzFilehandle {
 
     return { bytesRead, buffer: buf }
   }
+
+  async close(): Promise<void> {
+    return
+  }
+
+  public async readFile(): Promise<Buffer>
+  public async readFile(options: BufferEncoding): Promise<string>
+  public async readFile<T extends undefined>(
+    options:
+      | Omit<FilehandleOptions, 'encoding'>
+      | (Omit<FilehandleOptions, 'encoding'> & { encoding: T }),
+  ): Promise<Buffer>
+  public async readFile<T extends BufferEncoding>(
+    options: Omit<FilehandleOptions, 'encoding'> & { encoding: T },
+  ): Promise<string>
+  readFile<T extends BufferEncoding>(
+    options: Omit<FilehandleOptions, 'encoding'> & { encoding: T },
+  ): T extends BufferEncoding ? Promise<Buffer> : Promise<Buffer | string>
+  async readFile(options: FilehandleOptions | BufferEncoding = {}) {
+    const data = await this.filehandle.readFile()
+    const buf = await unzip(data)
+    let encoding
+    if (typeof options === 'string') {
+      encoding = options
+    } else {
+      encoding = options.encoding
+    }
+    if (encoding === 'utf8') {
+      return buf.toString('utf8')
+    } else {
+      return buf
+    }
+  }
 }