Add:Scanner extracts cover from comic files #1837 and ComicInfo.xml parser

server/libs/libarchive/libarchiveWorker.js

@@ -0,0 +1,72 @@
+/**
+ * Modified from https://github.com/nika-begiashvili/libarchivejs
+ */
+
+const { parentPort } = require('worker_threads')
+const { getArchiveReader } = require('./wasm-module')
+
+let reader = null
+let busy = false
+
+getArchiveReader((_reader) => {
+  reader = _reader
+  busy = false
+  parentPort.postMessage({ type: 'READY' })
+})
+
+parentPort.on('message', async msg => {
+  if (busy) {
+    parentPort.postMessage({ type: 'BUSY' })
+    return
+  }
+
+  let skipExtraction = false
+  busy = true
+  try {
+    switch (msg.type) {
+      case 'HELLO': // module will respond READY when it's ready
+        break
+      case 'OPEN':
+        await reader.open(msg.file)
+        parentPort.postMessage({ type: 'OPENED' })
+        break
+      case 'LIST_FILES':
+        skipExtraction = true
+      // eslint-disable-next-line no-fallthrough
+      case 'EXTRACT_FILES':
+        for (const entry of reader.entries(skipExtraction)) {
+          parentPort.postMessage({ type: 'ENTRY', entry })
+        }
+        parentPort.postMessage({ type: 'END' })
+        break
+      case 'EXTRACT_SINGLE_FILE':
+        for (const entry of reader.entries(true, msg.target)) {
+          if (entry.fileData) {
+            parentPort.postMessage({ type: 'FILE', entry })
+          }
+        }
+        break
+      case 'CHECK_ENCRYPTION':
+        parentPort.postMessage({ type: 'ENCRYPTION_STATUS', status: reader.hasEncryptedData() })
+        break
+      case 'SET_PASSPHRASE':
+        reader.setPassphrase(msg.passphrase)
+        parentPort.postMessage({ type: 'PASSPHRASE_STATUS', status: true })
+        break
+      default:
+        throw new Error('Invalid Command')
+    }
+  } catch (err) {
+    parentPort.postMessage({
+      type: 'ERROR',
+      error: {
+        message: err.message,
+        name: err.name,
+        stack: err.stack
+      }
+    })
+  } finally {
+    // eslint-disable-next-line require-atomic-updates
+    busy = false
+  }
+})