private val imageCache = CacheBuilder.newBuilder().build<String, LinkedElement>()
private val callback = object : FreenetInterface.BackgroundFetchCallback {
override fun cancelForMimeType(uri: FreenetURI, mimeType: String): Boolean {
- println("Got MIME Type “$mimeType” for $uri.")
return !mimeType.startsWith("image/")
}
override fun loaded(uri: FreenetURI, mimeType: String, data: ByteArray) {
- println("Got ${data.size} Bytes with MIME Type $mimeType for $uri.")
if (!mimeType.startsWith("image/")) {
return
}
ByteArrayInputStream(data).use {
ImageIO.read(it)
}?.let {
- println("Successfully parsed images from $uri.")
imageCache.get(uri.toString().decode().normalize()) { LinkedElement(uri.toString()) }
}
removeLoadingLink(uri)
}
override fun failed(uri: FreenetURI) {
- println("Failed to load $uri.")
failureCache.put(uri.toString().decode().normalize(), true)
removeLoadingLink(uri)
}
private fun removeLoadingLink(uri: FreenetURI) {
- println("Not loading anymore: $uri.")
synchronized(loadingLinks) {
loadingLinks.invalidate(uri.toString().decode().normalize())
}
override fun loadElement(link: String): LinkedElement {
val normalizedLink = link.decode().normalize()
- println("Checking for $normalizedLink...")
synchronized(loadingLinks) {
imageCache.getIfPresent(normalizedLink)?.run {
- println("In the Image Cache: $normalizedLink")
return this
}
failureCache.getIfPresent(normalizedLink)?.run {
- println("In the Failure Cache: $normalizedLink")
return LinkedElement(link, failed = true)
}
if (loadingLinks.getIfPresent(normalizedLink) == null) {
- println("Not loading: $normalizedLink")
loadingLinks.put(normalizedLink, true)
freenetInterface.startFetch(FreenetURI(link), callback)
}
}
- println("Returning loading element: $normalizedLink")
return LinkedElement(link, loading = true)
}