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Creates a Loading state to avoid requesting NIP-11 documents twice.

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Vitor Pamplona 2024-06-13 13:29:07 -04:00
parent 45445c03e5
commit 26cbc0754e
1 changed files with 53 additions and 31 deletions
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84
app/src/main/java/com/vitorpamplona/amethyst/service/Nip11RelayInfoRetriever.kt
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@ -33,14 +33,23 @@ import okhttp3.Response
import java.io.IOException
object Nip11CachedRetriever {
open class RetrieveResult(val time: Long)
open class RetrieveResult(
val time: Long,
)
class RetrieveResultError(val error: Nip11Retriever.ErrorCode, val msg: String? = null) : RetrieveResult(TimeUtils.now())
class RetrieveResultError(
val error: Nip11Retriever.ErrorCode,
val msg: String? = null,
) : RetrieveResult(TimeUtils.now())
class RetrieveResultSuccess(val data: Nip11RelayInformation) : RetrieveResult(TimeUtils.now())
class RetrieveResultSuccess(
val data: Nip11RelayInformation,
) : RetrieveResult(TimeUtils.now())
val relayInformationDocumentCache = LruCache<String, RetrieveResult?>(100)
val retriever = Nip11Retriever()
class RetrieveResultLoading : RetrieveResult(TimeUtils.now())
private val relayInformationDocumentCache = LruCache<String, RetrieveResult?>(100)
private val retriever = Nip11Retriever()
fun getFromCache(dirtyUrl: String): Nip11RelayInformation? {
val result = relayInformationDocumentCache.get(RelayUrlFormatter.getHttpsUrl(dirtyUrl)) ?: return null
@ -53,45 +62,53 @@ object Nip11CachedRetriever {
onInfo: (Nip11RelayInformation) -> Unit,
onError: (String, Nip11Retriever.ErrorCode, String?) -> Unit,
) {
checkNotInMainThread()
val url = RelayUrlFormatter.getHttpsUrl(dirtyUrl)
val doc = relayInformationDocumentCache.get(url)
if (doc != null) {
if (doc is RetrieveResultSuccess) {
onInfo(doc.data)
} else if (doc is RetrieveResultLoading) {
if (TimeUtils.now() - doc.time < TimeUtils.ONE_MINUTE) {
// just wait.
} else {
retrieve(url, dirtyUrl, onInfo, onError)
}
} else if (doc is RetrieveResultError) {
if (TimeUtils.now() - doc.time < TimeUtils.ONE_HOUR) {
onError(dirtyUrl, doc.error, null)
} else {
retriever.loadRelayInfo(
url = url,
dirtyUrl = dirtyUrl,
onInfo = {
relayInformationDocumentCache.put(url, RetrieveResultSuccess(it))
onInfo(it)
},
onError = { dirtyUrl, code, errorMsg ->
relayInformationDocumentCache.put(url, RetrieveResultError(code, errorMsg))
onError(url, code, errorMsg)
},
)
retrieve(url, dirtyUrl, onInfo, onError)
}
}
} else {
retriever.loadRelayInfo(
url = url,
dirtyUrl = dirtyUrl,
onInfo = {
relayInformationDocumentCache.put(url, RetrieveResultSuccess(it))
onInfo(it)
},
onError = { dirtyUrl, code, errorMsg ->
relayInformationDocumentCache.put(url, RetrieveResultError(code, errorMsg))
onError(url, code, errorMsg)
},
)
retrieve(url, dirtyUrl, onInfo, onError)
}
}
private suspend fun retrieve(
url: String,
dirtyUrl: String,
onInfo: (Nip11RelayInformation) -> Unit,
onError: (String, Nip11Retriever.ErrorCode, String?) -> Unit,
) {
relayInformationDocumentCache.put(url, RetrieveResultLoading())
retriever.loadRelayInfo(
url = url,
dirtyUrl = dirtyUrl,
onInfo = {
checkNotInMainThread()
relayInformationDocumentCache.put(url, RetrieveResultSuccess(it))
onInfo(it)
},
onError = { dirtyUrl, code, errorMsg ->
checkNotInMainThread()
relayInformationDocumentCache.put(url, RetrieveResultError(code, errorMsg))
onError(url, code, errorMsg)
},
)
}
}
class Nip11Retriever {
@ -111,9 +128,14 @@ class Nip11Retriever {
checkNotInMainThread()
try {
val request: Request =
Request.Builder().header("Accept", "application/nostr+json").url(url).build()
Request
.Builder()
.header("Accept", "application/nostr+json")
.url(url)
.build()
HttpClientManager.getHttpClientForUrl(dirtyUrl)
HttpClientManager
.getHttpClientForUrl(dirtyUrl)
.newCall(request)
.enqueue(
object : Callback {