ref: rename PreviewGenerator

src/Preview+iTunesPurchase.swift

@@ -0,0 +1,70 @@
+import Foundation
+
+extension MetaInfo {	
+	/// Read `iTunesMetadata.plist` if available
+	func readPlistItunes() -> PlistDict? {
+		switch self.type {
+		case .IPA:
+			// not `readPayloadFile` because plist is in root dir
+			return self.zipFile!.unzipFile("iTunesMetadata.plist")?.asPlistOrNil()
+		case .Archive, .Extension:
+			return nil
+		}
+	}
+}
+
+
+extension PreviewGenerator {
+	/// Concatenate all (sub)genres into a comma separated list.
+	private func formattedGenres(_ itunesPlist: PlistDict) -> String {
+		var genres: [String] = []
+		let genreId = itunesPlist["genreId"] as? Int ?? 0
+		if let mainGenre = AppCategories[genreId] ?? itunesPlist["genre"] as? String {
+			genres.append(mainGenre)
+		}
+		
+		for subgenre in itunesPlist["subgenres"] as? [PlistDict] ?? [] {
+			let subgenreId = subgenre["genreId"] as? Int ?? 0
+			if let subgenreStr = AppCategories[subgenreId] ?? subgenre["genre"] as? String {
+				genres.append(subgenreStr)
+			}
+		}
+		return genres.joined(separator: ", ")
+	}
+	
+	/// Process info stored in `iTunesMetadata.plist`
+	mutating func procItunesMeta(_ itunesPlist: PlistDict?) {
+		guard let itunesPlist else {
+			self.apply(["iTunesHidden": "hiddenDiv"])
+			return
+		}
+		
+		let downloadInfo = itunesPlist["com.apple.iTunesStore.downloadInfo"] as? PlistDict
+		let accountInfo = downloadInfo?["accountInfo"] as? PlistDict ?? [:]
+		
+		let purchaseDate = Date.parseAny(downloadInfo?["purchaseDate"] ?? itunesPlist["purchaseDate"])
+		let releaseDate = Date.parseAny(downloadInfo?["releaseDate"] ?? itunesPlist["releaseDate"])
+		// AppleId & purchaser name
+		let appleId = accountInfo["AppleID"] as? String ?? itunesPlist["appleId"] as? String ?? ""
+		let firstName = accountInfo["FirstName"] as? String ?? ""
+		let lastName = accountInfo["LastName"] as? String ?? ""
+		
+		let name: String
+		if !firstName.isEmpty || !lastName.isEmpty {
+			name = "\(firstName) \(lastName) (\(appleId))"
+		} else {
+			name = appleId
+		}
+		self.apply([
+			"iTunesHidden": "",
+			"iTunesId": (itunesPlist["itemId"] as? Int)?.description ?? "", // description]
+			"iTunesName": itunesPlist["itemName"] as? String ?? "",
+			"iTunesGenres": formattedGenres(itunesPlist),
+			"iTunesReleaseDate": releaseDate?.mediumFormat() ?? "",
+			
+			"iTunesAppleId": name,
+			"iTunesPurchaseDate": purchaseDate?.mediumFormat() ?? "",
+			"iTunesPrice": itunesPlist["priceDisplay"] as? String ?? "",
+		])
+	}
+}