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package com.pitchedapps.frost.facebook.requests
import com.bumptech.glide.Priority
import com.bumptech.glide.RequestBuilder
import com.bumptech.glide.load.DataSource
import com.bumptech.glide.load.Options
import com.bumptech.glide.load.data.DataFetcher
import com.bumptech.glide.load.model.ModelLoader
import com.bumptech.glide.load.model.ModelLoaderFactory
import com.bumptech.glide.load.model.MultiModelLoaderFactory
import com.bumptech.glide.request.RequestOptions
import com.bumptech.glide.request.target.Target
import com.bumptech.glide.signature.ObjectKey
import com.pitchedapps.frost.facebook.*
import io.reactivex.Maybe
import okhttp3.Call
import okhttp3.Request
import java.io.IOException
import java.io.InputStream
/**
* Created by Allan Wang on 29/12/17.
*/
fun RequestAuth.getFullSizedImage(fbid: Long) = frostRequest(::getJsonUrl) {
url("${FB_URL_BASE}photo/view_full_size/?fbid=$fbid&__ajax__=&__user=$userId")
get()
}
val test: () -> InputStream? = { null }
/**
* Attempts to get the fbcdn url of the supplied image redirect url
*/
fun String.getFullSizedImageUrl(url: String): Maybe<String?> = Maybe.fromCallable {
val redirect = requestBuilder().url(url).get().call()
.execute().body()?.string() ?: return@fromCallable null
return@fromCallable FB_REDIRECT_URL_MATCHER.find(redirect)[1]?.formattedFbUrl
?: return@fromCallable null
}.onErrorComplete()
/**
* Request loader for a potentially hd version of a url
* In this case, each url may potentially return an id,
* which may potentially be used to fetch a higher res image url
* The following aims to allow such loading while adhering to Glide's lifecycle
*/
data class HdImageMaybe(val url: String, val cookie: String) {
val id: Long by lazy { FB_IMAGE_ID_MATCHER.find(url)[1]?.toLongOrNull() ?: -1 }
val isValid: Boolean by lazy {
id != -1L && cookie.isNotBlank()
}
}
/*
* The following was a test to see if hd image loading would work
*
* It's working and tested, though the improvements aren't really worth the extra data use
* and reload
*/
class HdImageLoadingFactory : ModelLoaderFactory<HdImageMaybe, InputStream> {
override fun build(multiFactory: MultiModelLoaderFactory) = HdImageLoading()
override fun teardown() = Unit
}
fun <T> RequestBuilder<T>.loadWithPotentialHd(model: HdImageMaybe) =
thumbnail(clone().load(model.url))
.load(model)
.apply(RequestOptions().override(Target.SIZE_ORIGINAL))
class HdImageLoading : ModelLoader<HdImageMaybe, InputStream> {
override fun buildLoadData(model: HdImageMaybe,
width: Int,
height: Int,
options: Options): ModelLoader.LoadData<InputStream>? =
if (!model.isValid) null
else ModelLoader.LoadData(ObjectKey(model), HdImageFetcher(model))
override fun handles(model: HdImageMaybe) = model.isValid
}
class HdImageFetcher(private val model: HdImageMaybe) : DataFetcher<InputStream> {
@Volatile
private var cancelled: Boolean = false
private var urlCall: Call? = null
private var inputStream: InputStream? = null
private fun DataFetcher.DataCallback<in InputStream>.fail(msg: String) {
onLoadFailed(RuntimeException(msg))
}
override fun getDataClass(): Class<InputStream> = InputStream::class.java
override fun getDataSource(): DataSource = DataSource.REMOTE
override fun loadData(priority: Priority, callback: DataFetcher.DataCallback<in InputStream>) {
if (!model.isValid) return callback.fail("Model is invalid")
model.cookie.fbRequest(fail = { callback.fail("Invalid auth") }) {
if (cancelled) return@fbRequest callback.fail("Cancelled")
val url = getFullSizedImage(model.id).invoke()
?: return@fbRequest callback.fail("Null url")
if (cancelled) return@fbRequest callback.fail("Cancelled")
if (!url.contains("png") && !url.contains("jpg")) return@fbRequest callback.fail("Invalid format")
urlCall = Request.Builder().url(url).get().call()
inputStream = try {
urlCall?.execute()?.body()?.byteStream()
} catch (e: IOException) {
null
}
callback.onDataReady(inputStream)
}
}
override fun cleanup() {
try {
inputStream?.close()
} catch (e: IOException) {
} finally {
inputStream = null
}
}
override fun cancel() {
cancelled = true
urlCall?.cancel()
urlCall = null
cleanup()
}
}
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