feat: parse language from NFO metadata source

server/scanner/NfoFileScanner.js

@@ -38,6 +38,10 @@ class NfoFileScanner {
               sequence: nfoMetadata.sequence || null
             }]
           }
+        } else if (key === 'language') {
+          if (nfoMetadata.language) {
+            bookMetadata.language = nfoMetadata.language
+          }
         } else if (nfoMetadata[key] && key !== 'sequence') {
           bookMetadata[key] = nfoMetadata[key]
         }

server/utils/parsers/parseNfoMetadata.js

@@ -81,6 +81,10 @@ function parseNfoMetadata(nfoText) {
         case 'isbn-13':
           metadata.isbn = value
           break
+        case 'language':
+        case 'lang':
+          metadata.language = value
+          break
       }
     }
   })

test/server/utils/parsers/parseNfoMetadata.test.js

@@ -103,6 +103,16 @@ describe('parseNfoMetadata', () => {
     expect(result.asin).to.equal('B08X5JZJLH')
   })
 
+  it('parses language', () => {
+    const nfoText = 'Language: eng'
+    const result = parseNfoMetadata(nfoText)
+    expect(result.language).to.equal('eng')
+
+    const nfoText2 = 'lang: deu'
+    const result2 = parseNfoMetadata(nfoText2)
+    expect(result2.language).to.equal('deu')
+  })
+
   it('parses description', () => {
     const nfoText = 'Book Description\n=========\nThis is a book.\n It\'s good'
     const result = parseNfoMetadata(nfoText)