[feature] Allow users to create + delete bookbarks, and view bookmarked statuses (#1168)

* Implement Bookmarks

* Update based on review comments

* Update swagger doc

* Fix argument passing to status.Bookmark

* Update changed test

* Updates based on latest PR review

10 files changed, 398 insertions, 0 deletions

diff --git a/internal/processing/account/account.go b/internal/processing/account/account.go
index 3eccbc27d..4c29621ed 100644
--- a/internal/processing/account/account.go
+++ b/internal/processing/account/account.go
@@ -64,6 +64,9 @@ type Processor interface {
 	// WebStatusesGet fetches a number of statuses (in descending order) from the given account. It selects only
 	// statuses which are suitable for showing on the public web profile of an account.
 	WebStatusesGet(ctx context.Context, targetAccountID string, maxID string) (*apimodel.PageableResponse, gtserror.WithCode)
+	// StatusesGet fetches a number of statuses (in time descending order) from the given account, filtered by visibility for
+	// the account given in authed.
+	BookmarksGet(ctx context.Context, requestingAccount *gtsmodel.Account, limit int, maxID string, minID string) (*apimodel.PageableResponse, gtserror.WithCode)
 	// FollowersGet fetches a list of the target account's followers.
 	FollowersGet(ctx context.Context, requestingAccount *gtsmodel.Account, targetAccountID string) ([]apimodel.Account, gtserror.WithCode)
 	// FollowingGet fetches a list of the accounts that target account is following.
diff --git a/internal/processing/account/getbookmarks.go b/internal/processing/account/getbookmarks.go
new file mode 100644
index 000000000..0b15806c3
--- /dev/null
+++ b/internal/processing/account/getbookmarks.go
@@ -0,0 +1,88 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"context"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+func (p *processor) BookmarksGet(ctx context.Context, requestingAccount *gtsmodel.Account, limit int, maxID string, minID string) (*apimodel.PageableResponse, gtserror.WithCode) {
+	if requestingAccount == nil {
+		return nil, gtserror.NewErrorForbidden(fmt.Errorf("cannot retrieve bookmarks without a requesting account"))
+	}
+
+	bookmarks, err := p.db.GetBookmarks(ctx, requestingAccount.ID, limit, maxID, minID)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	count := len(bookmarks)
+	filtered := make([]*gtsmodel.Status, 0, len(bookmarks))
+	nextMaxIDValue := ""
+	prevMinIDValue := ""
+	for i, b := range bookmarks {
+		s, err := p.db.GetStatusByID(ctx, b.StatusID)
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+
+		visible, err := p.filter.StatusVisible(ctx, s, requestingAccount)
+		if err == nil && visible {
+			if i == count-1 {
+				nextMaxIDValue = b.ID
+			}
+
+			if i == 0 {
+				prevMinIDValue = b.ID
+			}
+
+			filtered = append(filtered, s)
+		}
+	}
+
+	count = len(filtered)
+
+	if count == 0 {
+		return util.EmptyPageableResponse(), nil
+	}
+
+	items := []interface{}{}
+	for _, s := range filtered {
+		item, err := p.tc.StatusToAPIStatus(ctx, s, requestingAccount)
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting status to api: %s", err))
+		}
+		items = append(items, item)
+	}
+
+	return util.PackagePageableResponse(util.PageableResponseParams{
+		Items:            items,
+		Path:             "/api/v1/bookmarks",
+		NextMaxIDValue:   nextMaxIDValue,
+		PrevMinIDValue:   prevMinIDValue,
+		Limit:            limit,
+		ExtraQueryParams: []string{},
+	})
+}
diff --git a/internal/processing/bookmark.go b/internal/processing/bookmark.go
new file mode 100644
index 000000000..c3bcfca4a
--- /dev/null
+++ b/internal/processing/bookmark.go
@@ -0,0 +1,31 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package processing
+
+import (
+	"context"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+func (p *processor) BookmarksGet(ctx context.Context, authed *oauth.Auth, maxID string, minID string, limit int) (*apimodel.PageableResponse, gtserror.WithCode) {
+	return p.accountProcessor.BookmarksGet(ctx, authed.Account, limit, maxID, minID)
+}
diff --git a/internal/processing/processor.go b/internal/processing/processor.go
index 22fb7b2b7..88b0f5594 100644
--- a/internal/processing/processor.go
+++ b/internal/processing/processor.go
@@ -146,6 +146,9 @@ type Processor interface {
 	// CustomEmojisGet returns an array of info about the custom emojis on this server
 	CustomEmojisGet(ctx context.Context) ([]*apimodel.Emoji, gtserror.WithCode)
 
+	// BookmarksGet returns a pageable response of statuses that have been bookmarked
+	BookmarksGet(ctx context.Context, authed *oauth.Auth, maxID string, minID string, limit int) (*apimodel.PageableResponse, gtserror.WithCode)
+
 	// FileGet handles the fetching of a media attachment file via the fileserver.
 	FileGet(ctx context.Context, authed *oauth.Auth, form *apimodel.GetContentRequestForm) (*apimodel.Content, gtserror.WithCode)
 
@@ -202,6 +205,10 @@ type Processor interface {
 	StatusUnfave(ctx context.Context, authed *oauth.Auth, targetStatusID string) (*apimodel.Status, gtserror.WithCode)
 	// StatusGetContext returns the context (previous and following posts) from the given status ID
 	StatusGetContext(ctx context.Context, authed *oauth.Auth, targetStatusID string) (*apimodel.Context, gtserror.WithCode)
+	// StatusBookmark process a bookmark for a status
+	StatusBookmark(ctx context.Context, authed *oauth.Auth, targetStatusID string) (*apimodel.Status, gtserror.WithCode)
+	// StatusUnbookmark removes a bookmark for a status
+	StatusUnbookmark(ctx context.Context, authed *oauth.Auth, targetStatusID string) (*apimodel.Status, gtserror.WithCode)
 
 	// HomeTimelineGet returns statuses from the home timeline, with the given filters/parameters.
 	HomeTimelineGet(ctx context.Context, authed *oauth.Auth, maxID string, sinceID string, minID string, limit int, local bool) (*apimodel.PageableResponse, gtserror.WithCode)
diff --git a/internal/processing/status.go b/internal/processing/status.go
index b2f222971..808079c97 100644
--- a/internal/processing/status.go
+++ b/internal/processing/status.go
@@ -65,3 +65,11 @@ func (p *processor) StatusUnfave(ctx context.Context, authed *oauth.Auth, target
 func (p *processor) StatusGetContext(ctx context.Context, authed *oauth.Auth, targetStatusID string) (*apimodel.Context, gtserror.WithCode) {
 	return p.statusProcessor.Context(ctx, authed.Account, targetStatusID)
 }
+
+func (p *processor) StatusBookmark(ctx context.Context, authed *oauth.Auth, targetStatusID string) (*apimodel.Status, gtserror.WithCode) {
+	return p.statusProcessor.Bookmark(ctx, authed.Account, targetStatusID)
+}
+
+func (p *processor) StatusUnbookmark(ctx context.Context, authed *oauth.Auth, targetStatusID string) (*apimodel.Status, gtserror.WithCode) {
+	return p.statusProcessor.Unbookmark(ctx, authed.Account, targetStatusID)
+}
diff --git a/internal/processing/status/bookmark.go b/internal/processing/status/bookmark.go
new file mode 100644
index 000000000..0f13fbacf
--- /dev/null
+++ b/internal/processing/status/bookmark.go
@@ -0,0 +1,86 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package status
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+)
+
+func (p *processor) Bookmark(ctx context.Context, requestingAccount *gtsmodel.Account, targetStatusID string) (*apimodel.Status, gtserror.WithCode) {
+	targetStatus, err := p.db.GetStatusByID(ctx, targetStatusID)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error fetching status %s: %s", targetStatusID, err))
+	}
+	if targetStatus.Account == nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("no status owner for status %s", targetStatusID))
+	}
+	visible, err := p.filter.StatusVisible(ctx, targetStatus, requestingAccount)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error seeing if status %s is visible: %s", targetStatus.ID, err))
+	}
+	if !visible {
+		return nil, gtserror.NewErrorNotFound(errors.New("status is not visible"))
+	}
+
+	// first check if the status is already bookmarked, if so we don't need to do anything
+	newBookmark := true
+	gtsBookmark := &gtsmodel.StatusBookmark{}
+	if err := p.db.GetWhere(ctx, []db.Where{{Key: "status_id", Value: targetStatus.ID}, {Key: "account_id", Value: requestingAccount.ID}}, gtsBookmark); err == nil {
+		// we already have a bookmark for this status
+		newBookmark = false
+	}
+
+	if newBookmark {
+		thisBookmarkID, err := id.NewULID()
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+
+		// we need to create a new bookmark in the database
+		gtsBookmark := &gtsmodel.StatusBookmark{
+			ID:              thisBookmarkID,
+			AccountID:       requestingAccount.ID,
+			Account:         requestingAccount,
+			TargetAccountID: targetStatus.AccountID,
+			TargetAccount:   targetStatus.Account,
+			StatusID:        targetStatus.ID,
+			Status:          targetStatus,
+		}
+
+		if err := p.db.Put(ctx, gtsBookmark); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("error putting bookmark in database: %s", err))
+		}
+	}
+
+	// return the apidon representation of the target status
+	apiStatus, err := p.tc.StatusToAPIStatus(ctx, targetStatus, requestingAccount)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting status %s to frontend representation: %s", targetStatus.ID, err))
+	}
+
+	return apiStatus, nil
+}
diff --git a/internal/processing/status/bookmark_test.go b/internal/processing/status/bookmark_test.go
new file mode 100644
index 000000000..ed1f9c774
--- /dev/null
+++ b/internal/processing/status/bookmark_test.go
@@ -0,0 +1,48 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package status_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+)
+
+type StatusBookmarkTestSuite struct {
+	StatusStandardTestSuite
+}
+
+func (suite *StatusBookmarkTestSuite) TestBookmark() {
+	ctx := context.Background()
+
+	// bookmark a status
+	bookmarkingAccount1 := suite.testAccounts["local_account_1"]
+	targetStatus1 := suite.testStatuses["admin_account_status_1"]
+
+	bookmark1, err := suite.status.Bookmark(ctx, bookmarkingAccount1, targetStatus1.ID)
+	suite.NoError(err)
+	suite.NotNil(bookmark1)
+	suite.True(bookmark1.Bookmarked)
+	suite.Equal(targetStatus1.ID, bookmark1.ID)
+}
+
+func TestStatusBookmarkTestSuite(t *testing.T) {
+	suite.Run(t, new(StatusBookmarkTestSuite))
+}
diff --git a/internal/processing/status/status.go b/internal/processing/status/status.go
index c63769c76..d31b69b38 100644
--- a/internal/processing/status/status.go
+++ b/internal/processing/status/status.go
@@ -54,6 +54,10 @@ type Processor interface {
 	Unfave(ctx context.Context, account *gtsmodel.Account, targetStatusID string) (*apimodel.Status, gtserror.WithCode)
 	// Context returns the context (previous and following posts) from the given status ID
 	Context(ctx context.Context, account *gtsmodel.Account, targetStatusID string) (*apimodel.Context, gtserror.WithCode)
+	// Bookmarks a status
+	Bookmark(ctx context.Context, account *gtsmodel.Account, targetStatusID string) (*apimodel.Status, gtserror.WithCode)
+	// Removes a bookmark for a status
+	Unbookmark(ctx context.Context, account *gtsmodel.Account, targetStatusID string) (*apimodel.Status, gtserror.WithCode)
 
 	/*
 		PROCESSING UTILS
diff --git a/internal/processing/status/unbookmark.go b/internal/processing/status/unbookmark.go
new file mode 100644
index 000000000..ef5962495
--- /dev/null
+++ b/internal/processing/status/unbookmark.go
@@ -0,0 +1,69 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package status
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) Unbookmark(ctx context.Context, requestingAccount *gtsmodel.Account, targetStatusID string) (*apimodel.Status, gtserror.WithCode) {
+	targetStatus, err := p.db.GetStatusByID(ctx, targetStatusID)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error fetching status %s: %s", targetStatusID, err))
+	}
+	if targetStatus.Account == nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("no status owner for status %s", targetStatusID))
+	}
+	visible, err := p.filter.StatusVisible(ctx, targetStatus, requestingAccount)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error seeing if status %s is visible: %s", targetStatus.ID, err))
+	}
+	if !visible {
+		return nil, gtserror.NewErrorNotFound(errors.New("status is not visible"))
+	}
+
+	// first check if the status is already bookmarked
+	toUnbookmark := false
+	gtsBookmark := &gtsmodel.StatusBookmark{}
+	if err := p.db.GetWhere(ctx, []db.Where{{Key: "status_id", Value: targetStatus.ID}, {Key: "account_id", Value: requestingAccount.ID}}, gtsBookmark); err == nil {
+		// we already have a bookmark for this status
+		toUnbookmark = true
+	}
+
+	if toUnbookmark {
+		if err := p.db.DeleteWhere(ctx, []db.Where{{Key: "status_id", Value: targetStatus.ID}, {Key: "account_id", Value: requestingAccount.ID}}, gtsBookmark); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("error unfaveing status: %s", err))
+		}
+	}
+
+	// return the apidon representation of the target status
+	apiStatus, err := p.tc.StatusToAPIStatus(ctx, targetStatus, requestingAccount)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting status %s to frontend representation: %s", targetStatus.ID, err))
+	}
+
+	return apiStatus, nil
+}
diff --git a/internal/processing/status/unbookmark_test.go b/internal/processing/status/unbookmark_test.go
new file mode 100644
index 000000000..38a60d776
--- /dev/null
+++ b/internal/processing/status/unbookmark_test.go
@@ -0,0 +1,54 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package status_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+)
+
+type StatusUnbookmarkTestSuite struct {
+	StatusStandardTestSuite
+}
+
+func (suite *StatusUnbookmarkTestSuite) TestUnbookmark() {
+	ctx := context.Background()
+
+	// bookmark a status
+	bookmarkingAccount1 := suite.testAccounts["local_account_1"]
+	targetStatus1 := suite.testStatuses["admin_account_status_1"]
+
+	bookmark1, err := suite.status.Bookmark(ctx, bookmarkingAccount1, targetStatus1.ID)
+	suite.NoError(err)
+	suite.NotNil(bookmark1)
+	suite.True(bookmark1.Bookmarked)
+	suite.Equal(targetStatus1.ID, bookmark1.ID)
+
+	bookmark2, err := suite.status.Unbookmark(ctx, bookmarkingAccount1, targetStatus1.ID)
+	suite.NoError(err)
+	suite.NotNil(bookmark2)
+	suite.False(bookmark2.Bookmarked)
+	suite.Equal(targetStatus1.ID, bookmark1.ID)
+}
+
+func TestStatusUnbookmarkTestSuite(t *testing.T) {
+	suite.Run(t, new(StatusUnbookmarkTestSuite))
+}