Adding upstream version 9.0.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

2 files changed, 236 insertions, 0 deletions

diff --git a/models/pull/automerge.go b/models/pull/automerge.go
new file mode 100644
index 0000000..f31159a
--- /dev/null
+++ b/models/pull/automerge.go
@@ -0,0 +1,97 @@
+// Copyright 2022 Gitea. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package pull
+
+import (
+	"context"
+	"fmt"
+
+	"code.gitea.io/gitea/models/db"
+	repo_model "code.gitea.io/gitea/models/repo"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/timeutil"
+)
+
+// AutoMerge represents a pull request scheduled for merging when checks succeed
+type AutoMerge struct {
+	ID          int64                 `xorm:"pk autoincr"`
+	PullID      int64                 `xorm:"UNIQUE"`
+	DoerID      int64                 `xorm:"INDEX NOT NULL"`
+	Doer        *user_model.User      `xorm:"-"`
+	MergeStyle  repo_model.MergeStyle `xorm:"varchar(30)"`
+	Message     string                `xorm:"LONGTEXT"`
+	CreatedUnix timeutil.TimeStamp    `xorm:"created"`
+}
+
+// TableName return database table name for xorm
+func (AutoMerge) TableName() string {
+	return "pull_auto_merge"
+}
+
+func init() {
+	db.RegisterModel(new(AutoMerge))
+}
+
+// ErrAlreadyScheduledToAutoMerge represents a "PullRequestHasMerged"-error
+type ErrAlreadyScheduledToAutoMerge struct {
+	PullID int64
+}
+
+func (err ErrAlreadyScheduledToAutoMerge) Error() string {
+	return fmt.Sprintf("pull request is already scheduled to auto merge when checks succeed [pull_id: %d]", err.PullID)
+}
+
+// IsErrAlreadyScheduledToAutoMerge checks if an error is a ErrAlreadyScheduledToAutoMerge.
+func IsErrAlreadyScheduledToAutoMerge(err error) bool {
+	_, ok := err.(ErrAlreadyScheduledToAutoMerge)
+	return ok
+}
+
+// ScheduleAutoMerge schedules a pull request to be merged when all checks succeed
+func ScheduleAutoMerge(ctx context.Context, doer *user_model.User, pullID int64, style repo_model.MergeStyle, message string) error {
+	// Check if we already have a merge scheduled for that pull request
+	if exists, _, err := GetScheduledMergeByPullID(ctx, pullID); err != nil {
+		return err
+	} else if exists {
+		return ErrAlreadyScheduledToAutoMerge{PullID: pullID}
+	}
+
+	_, err := db.GetEngine(ctx).Insert(&AutoMerge{
+		DoerID:     doer.ID,
+		PullID:     pullID,
+		MergeStyle: style,
+		Message:    message,
+	})
+	return err
+}
+
+// GetScheduledMergeByPullID gets a scheduled pull request merge by pull request id
+func GetScheduledMergeByPullID(ctx context.Context, pullID int64) (bool, *AutoMerge, error) {
+	scheduledPRM := &AutoMerge{}
+	exists, err := db.GetEngine(ctx).Where("pull_id = ?", pullID).Get(scheduledPRM)
+	if err != nil || !exists {
+		return false, nil, err
+	}
+
+	doer, err := user_model.GetPossibleUserByID(ctx, scheduledPRM.DoerID)
+	if err != nil {
+		return false, nil, err
+	}
+
+	scheduledPRM.Doer = doer
+	return true, scheduledPRM, nil
+}
+
+// DeleteScheduledAutoMerge delete a scheduled pull request
+func DeleteScheduledAutoMerge(ctx context.Context, pullID int64) error {
+	exist, scheduledPRM, err := GetScheduledMergeByPullID(ctx, pullID)
+	if err != nil {
+		return err
+	} else if !exist {
+		return db.ErrNotExist{Resource: "auto_merge", ID: pullID}
+	}
+
+	_, err = db.GetEngine(ctx).ID(scheduledPRM.ID).Delete(&AutoMerge{})
+	return err
+}
diff --git a/models/pull/review_state.go b/models/pull/review_state.go
new file mode 100644
index 0000000..e46a22a
--- /dev/null
+++ b/models/pull/review_state.go
@@ -0,0 +1,139 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package pull
+
+import (
+	"context"
+	"fmt"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/timeutil"
+)
+
+// ViewedState stores for a file in which state it is currently viewed
+type ViewedState uint8
+
+const (
+	Unviewed   ViewedState = iota
+	HasChanged             // cannot be set from the UI/ API, only internally
+	Viewed
+)
+
+func (viewedState ViewedState) String() string {
+	switch viewedState {
+	case Unviewed:
+		return "unviewed"
+	case HasChanged:
+		return "has-changed"
+	case Viewed:
+		return "viewed"
+	default:
+		return fmt.Sprintf("unknown(value=%d)", viewedState)
+	}
+}
+
+// ReviewState stores for a user-PR-commit combination which files the user has already viewed
+type ReviewState struct {
+	ID           int64                  `xorm:"pk autoincr"`
+	UserID       int64                  `xorm:"NOT NULL UNIQUE(pull_commit_user)"`
+	PullID       int64                  `xorm:"NOT NULL INDEX UNIQUE(pull_commit_user) DEFAULT 0"` // Which PR was the review on?
+	CommitSHA    string                 `xorm:"NOT NULL VARCHAR(64) UNIQUE(pull_commit_user)"`     // Which commit was the head commit for the review?
+	UpdatedFiles map[string]ViewedState `xorm:"NOT NULL LONGTEXT JSON"`                            // Stores for each of the changed files of a PR whether they have been viewed, changed since last viewed, or not viewed
+	UpdatedUnix  timeutil.TimeStamp     `xorm:"updated"`                                           // Is an accurate indicator of the order of commits as we do not expect it to be possible to make reviews on previous commits
+}
+
+func init() {
+	db.RegisterModel(new(ReviewState))
+}
+
+// GetReviewState returns the ReviewState with all given values prefilled, whether or not it exists in the database.
+// If the review didn't exist before in the database, it won't afterwards either.
+// The returned boolean shows whether the review exists in the database
+func GetReviewState(ctx context.Context, userID, pullID int64, commitSHA string) (*ReviewState, bool, error) {
+	review := &ReviewState{UserID: userID, PullID: pullID, CommitSHA: commitSHA}
+	has, err := db.GetEngine(ctx).Get(review)
+	return review, has, err
+}
+
+// UpdateReviewState updates the given review inside the database, regardless of whether it existed before or not
+// The given map of files with their viewed state will be merged with the previous review, if present
+func UpdateReviewState(ctx context.Context, userID, pullID int64, commitSHA string, updatedFiles map[string]ViewedState) error {
+	log.Trace("Updating review for user %d, repo %d, commit %s with the updated files %v.", userID, pullID, commitSHA, updatedFiles)
+
+	review, exists, err := GetReviewState(ctx, userID, pullID, commitSHA)
+	if err != nil {
+		return err
+	}
+
+	if exists {
+		review.UpdatedFiles = mergeFiles(review.UpdatedFiles, updatedFiles)
+	} else if previousReview, err := getNewestReviewStateApartFrom(ctx, userID, pullID, commitSHA); err != nil {
+		return err
+
+		// Overwrite the viewed files of the previous review if present
+	} else if previousReview != nil {
+		review.UpdatedFiles = mergeFiles(previousReview.UpdatedFiles, updatedFiles)
+	} else {
+		review.UpdatedFiles = updatedFiles
+	}
+
+	// Insert or Update review
+	engine := db.GetEngine(ctx)
+	if !exists {
+		log.Trace("Inserting new review for user %d, repo %d, commit %s with the updated files %v.", userID, pullID, commitSHA, review.UpdatedFiles)
+		_, err := engine.Insert(review)
+		return err
+	}
+	log.Trace("Updating already existing review with ID %d (user %d, repo %d, commit %s) with the updated files %v.", review.ID, userID, pullID, commitSHA, review.UpdatedFiles)
+	_, err = engine.ID(review.ID).Update(&ReviewState{UpdatedFiles: review.UpdatedFiles})
+	return err
+}
+
+// mergeFiles merges the given maps of files with their viewing state into one map.
+// Values from oldFiles will be overridden with values from newFiles
+func mergeFiles(oldFiles, newFiles map[string]ViewedState) map[string]ViewedState {
+	if oldFiles == nil {
+		return newFiles
+	} else if newFiles == nil {
+		return oldFiles
+	}
+
+	for file, viewed := range newFiles {
+		oldFiles[file] = viewed
+	}
+	return oldFiles
+}
+
+// GetNewestReviewState gets the newest review of the current user in the current PR.
+// The returned PR Review will be nil if the user has not yet reviewed this PR.
+func GetNewestReviewState(ctx context.Context, userID, pullID int64) (*ReviewState, error) {
+	var review ReviewState
+	has, err := db.GetEngine(ctx).Where("user_id = ?", userID).And("pull_id = ?", pullID).OrderBy("updated_unix DESC").Get(&review)
+	if err != nil || !has {
+		return nil, err
+	}
+	return &review, err
+}
+
+// getNewestReviewStateApartFrom is like GetNewestReview, except that the second newest review will be returned if the newest review points at the given commit.
+// The returned PR Review will be nil if the user has not yet reviewed this PR.
+func getNewestReviewStateApartFrom(ctx context.Context, userID, pullID int64, commitSHA string) (*ReviewState, error) {
+	var reviews []ReviewState
+	err := db.GetEngine(ctx).Where("user_id = ?", userID).And("pull_id = ?", pullID).OrderBy("updated_unix DESC").Limit(2).Find(&reviews)
+	// It would also be possible to use ".And("commit_sha != ?", commitSHA)" instead of the error handling below
+	// However, benchmarks show drastically improved performance by not doing that
+
+	// Error cases in which no review should be returned
+	if err != nil || len(reviews) == 0 || (len(reviews) == 1 && reviews[0].CommitSHA == commitSHA) {
+		return nil, err
+
+		// The first review points at the commit to exclude, hence skip to the second review
+	} else if len(reviews) >= 2 && reviews[0].CommitSHA == commitSHA {
+		return &reviews[1], nil
+	}
+
+	// As we have no error cases left, the result must be the first element in the list
+	return &reviews[0], nil
+}