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// Copyright 2000-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package org.jetbrains.plugins.github.pullrequest.comment
import com.intellij.collaboration.ui.SingleValueModel
import com.intellij.diff.tools.fragmented.UnifiedDiffViewer
import com.intellij.diff.tools.simple.SimpleOnesideDiffViewer
import com.intellij.diff.tools.util.base.DiffViewerBase
import com.intellij.diff.tools.util.side.TwosideTextDiffViewer
import com.intellij.execution.process.ProcessIOExecutorService
import com.intellij.openapi.Disposable
import com.intellij.openapi.diff.impl.patch.PatchReader
import com.intellij.openapi.project.Project
import org.jetbrains.plugins.github.api.data.GHUser
import org.jetbrains.plugins.github.api.data.pullrequest.GHPullRequestPendingReview
import org.jetbrains.plugins.github.api.data.pullrequest.GHPullRequestReviewThread
import org.jetbrains.plugins.github.pullrequest.comment.ui.GHPRDiffEditorReviewComponentsFactoryImpl
import org.jetbrains.plugins.github.pullrequest.comment.ui.GHPRReviewProcessModelImpl
import org.jetbrains.plugins.github.pullrequest.comment.viewer.GHPRSimpleOnesideDiffViewerReviewThreadsHandler
import org.jetbrains.plugins.github.pullrequest.comment.viewer.GHPRTwosideDiffViewerReviewThreadsHandler
import org.jetbrains.plugins.github.pullrequest.comment.viewer.GHPRUnifiedDiffViewerReviewThreadsHandler
import org.jetbrains.plugins.github.pullrequest.data.GHPRChangeDiffData
import org.jetbrains.plugins.github.pullrequest.data.provider.GHPRDetailsDataProvider
import org.jetbrains.plugins.github.pullrequest.data.provider.GHPRReviewDataProvider
import org.jetbrains.plugins.github.pullrequest.ui.GHCompletableFutureLoadingModel
import org.jetbrains.plugins.github.pullrequest.ui.GHLoadingModel
import org.jetbrains.plugins.github.pullrequest.ui.GHSimpleLoadingModel
import org.jetbrains.plugins.github.pullrequest.ui.changes.GHPRCreateDiffCommentParametersHelper
import org.jetbrains.plugins.github.ui.avatars.GHAvatarIconsProvider
import org.jetbrains.plugins.github.util.GHPatchHunkUtil
import java.util.function.Function
import kotlin.properties.Delegates.observable
class GHPRDiffReviewSupportImpl(private val project: Project,
private val reviewDataProvider: GHPRReviewDataProvider,
private val detailsDataProvider: GHPRDetailsDataProvider,
private val diffData: GHPRChangeDiffData,
private val avatarIconsProvider: GHAvatarIconsProvider,
private val currentUser: GHUser)
: GHPRDiffReviewSupport {
private var pendingReviewLoadingModel: GHSimpleLoadingModel<GHPullRequestPendingReview?>? = null
private val reviewProcessModel = GHPRReviewProcessModelImpl()
private var reviewThreadsLoadingModel: GHSimpleLoadingModel<List<GHPRDiffReviewThreadMapping>>? = null
private val reviewThreadsModel = SingleValueModel<List<GHPRDiffReviewThreadMapping>?>(null)
override val isLoadingReviewData: Boolean
get() = reviewThreadsLoadingModel?.loading == true || pendingReviewLoadingModel?.loading == true
override var showReviewThreads by observable(true) { _, _, _ ->
updateReviewThreads()
}
override var showResolvedReviewThreads by observable(false) { _, _, _ ->
updateReviewThreads()
}
override fun install(viewer: DiffViewerBase) {
val diffRangesModel = SingleValueModel(if (reviewDataProvider.canComment()) diffData.diffRanges else null)
if (reviewDataProvider.canComment()) {
loadPendingReview(viewer)
var rangesInstalled = false
reviewProcessModel.addAndInvokeChangesListener {
if (reviewProcessModel.isActual && !rangesInstalled) {
diffRangesModel.value = diffData.diffRanges
rangesInstalled = true
}
}
}
loadReviewThreads(viewer)
val createCommentParametersHelper = GHPRCreateDiffCommentParametersHelper(diffData.commitSha, diffData.filePath, diffData.linesMapper)
val componentsFactory = GHPRDiffEditorReviewComponentsFactoryImpl(project,
reviewDataProvider,
detailsDataProvider,
createCommentParametersHelper,
avatarIconsProvider, currentUser)
val cumulative = diffData is GHPRChangeDiffData.Cumulative
when (viewer) {
is SimpleOnesideDiffViewer ->
GHPRSimpleOnesideDiffViewerReviewThreadsHandler(reviewProcessModel, diffRangesModel, reviewThreadsModel, viewer, componentsFactory,
cumulative)
is UnifiedDiffViewer ->
GHPRUnifiedDiffViewerReviewThreadsHandler(reviewProcessModel, diffRangesModel, reviewThreadsModel, viewer, componentsFactory,
cumulative)
is TwosideTextDiffViewer ->
GHPRTwosideDiffViewerReviewThreadsHandler(reviewProcessModel, diffRangesModel, reviewThreadsModel, viewer, componentsFactory,
cumulative)
else -> return
}
}
override fun reloadReviewData() {
reviewDataProvider.resetPendingReview()
reviewDataProvider.resetReviewThreads()
}
private fun loadPendingReview(disposable: Disposable) {
val loadingModel = GHCompletableFutureLoadingModel<GHPullRequestPendingReview?>(disposable).also {
it.addStateChangeListener(object : GHLoadingModel.StateChangeListener {
override fun onLoadingCompleted() {
if (it.resultAvailable) {
reviewProcessModel.populatePendingReviewData(it.result)
}
}
})
}
pendingReviewLoadingModel = loadingModel
doLoadPendingReview(loadingModel)
reviewDataProvider.addPendingReviewListener(disposable) {
reviewProcessModel.clearPendingReviewData()
doLoadPendingReview(loadingModel)
}
}
private fun doLoadPendingReview(model: GHCompletableFutureLoadingModel<GHPullRequestPendingReview?>) {
model.future = reviewDataProvider.loadPendingReview()
}
private fun loadReviewThreads(disposable: Disposable) {
val loadingModel = GHCompletableFutureLoadingModel<List<GHPRDiffReviewThreadMapping>>(disposable).apply {
addStateChangeListener(object : GHLoadingModel.StateChangeListener {
override fun onLoadingCompleted() = updateReviewThreads()
})
}
reviewThreadsLoadingModel = loadingModel
doLoadReviewThreads(loadingModel)
reviewDataProvider.addReviewThreadsListener(disposable) {
doLoadReviewThreads(loadingModel)
}
}
private fun doLoadReviewThreads(model: GHCompletableFutureLoadingModel<List<GHPRDiffReviewThreadMapping>>) {
model.future = reviewDataProvider.loadReviewThreads().thenApplyAsync(Function {
it.mapNotNull(::mapThread)
}, ProcessIOExecutorService.INSTANCE)
}
private fun mapThread(thread: GHPullRequestReviewThread): GHPRDiffReviewThreadMapping? {
val originalCommitSha = thread.originalCommit?.oid ?: return null
if (!diffData.contains(originalCommitSha, thread.path)) return null
val (side, line) = when (diffData) {
is GHPRChangeDiffData.Cumulative -> thread.side to thread.line - 1
is GHPRChangeDiffData.Commit -> {
val patchReader = PatchReader(GHPatchHunkUtil.createPatchFromHunk(thread.path, thread.diffHunk))
patchReader.readTextPatches()
val patchHunk = patchReader.textPatches[0].hunks.lastOrNull() ?: return null
val position = GHPatchHunkUtil.getHunkLinesCount(patchHunk) - 1
val (unmappedSide, unmappedLine) = GHPatchHunkUtil.findSideFileLineFromHunkLineIndex(patchHunk, position) ?: return null
diffData.mapPosition(originalCommitSha, unmappedSide, unmappedLine) ?: return null
}
}
return GHPRDiffReviewThreadMapping(side, line, thread)
}
private fun updateReviewThreads() {
val loadingModel = reviewThreadsLoadingModel ?: return
if (loadingModel.loading) return
reviewThreadsModel.value = if (showReviewThreads) loadingModel.result?.filter { showResolvedReviewThreads || !it.thread.isResolved } else null
}
}
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