[MODERATION] organization blocking a user (#802)

- Resolves #476
- Follow up for: #540
- Ensure that the doer and blocked person cannot follow each other.
- Ensure that the block person cannot watch doer's repositories.
- Add unblock button to the blocked user list.
- Add blocked since information to the blocked user list.
- Add extra testing to moderation code.
- Blocked user will unwatch doer's owned repository upon blocking.
- Add flash messages to let the user know the block/unblock action was successful.
- Add "You haven't blocked any users" message.
- Add organization blocking a user.

Co-authored-by: Gusted <postmaster@gusted.xyz>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/802
(cherry picked from commit 0505a10421)
(cherry picked from commit 37b4e6ef9b)
(cherry picked from commit c17c121f2c)

[MODERATION] organization blocking a user (#802) (squash)

Changes to adapt to:

  6bbccdd177 Improve AJAX link and modal confirm dialog (#25210)

Refs: https://codeberg.org/forgejo/forgejo/pulls/882/files#issuecomment-945962
Refs: https://codeberg.org/forgejo/forgejo/pulls/882#issue-330561
(cherry picked from commit 523635f83c)

services/user/block_test.go

@@ -0,0 +1,41 @@
+// Copyright 2023 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package user
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models/db"
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// TestBlockUser will ensure that when you block a user, certain actions have
+// been taken, like unfollowing each other etc.
+func TestBlockUser(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	doer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 5})
+	blockedUser := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
+
+	// Follow each other.
+	assert.NoError(t, user_model.FollowUser(db.DefaultContext, doer.ID, blockedUser.ID))
+	assert.NoError(t, user_model.FollowUser(db.DefaultContext, blockedUser.ID, doer.ID))
+
+	// Blocked user watch repository of doer.
+	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerID: doer.ID})
+	assert.NoError(t, repo_model.WatchRepo(db.DefaultContext, blockedUser.ID, repo.ID, true))
+
+	assert.NoError(t, BlockUser(db.DefaultContext, doer.ID, blockedUser.ID))
+
+	// Ensure they aren't following each other anymore.
+	assert.False(t, user_model.IsFollowing(doer.ID, blockedUser.ID))
+	assert.False(t, user_model.IsFollowing(blockedUser.ID, doer.ID))
+
+	// Ensure blocked user isn't following doer's repository.
+	assert.False(t, repo_model.IsWatching(blockedUser.ID, repo.ID))
+}