[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)

routers/web/org/setting/blocked_users.go

@@ -0,0 +1,61 @@
+// Copyright 2023 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package setting
+
+import (
+	"net/http"
+	"strings"
+
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/routers/utils"
+	user_service "code.gitea.io/gitea/services/user"
+)
+
+const tplBlockedUsers = "org/settings/blocked_users"
+
+// BlockedUsers renders the blocked users page.
+func BlockedUsers(ctx *context.Context) {
+	ctx.Data["Title"] = ctx.Tr("settings.blocked_users")
+	ctx.Data["PageIsSettingsBlockedUsers"] = true
+
+	blockedUsers, err := user_model.ListBlockedUsers(ctx, ctx.Org.Organization.ID)
+	if err != nil {
+		ctx.ServerError("ListBlockedUsers", err)
+		return
+	}
+
+	ctx.Data["BlockedUsers"] = blockedUsers
+
+	ctx.HTML(http.StatusOK, tplBlockedUsers)
+}
+
+// BlockedUsersBlock blocks a particular user from the organization.
+func BlockedUsersBlock(ctx *context.Context) {
+	uname := utils.RemoveUsernameParameterSuffix(strings.ToLower(ctx.FormString("uname")))
+	u, err := user_model.GetUserByName(ctx, uname)
+	if err != nil {
+		ctx.ServerError("GetUserByName", err)
+		return
+	}
+
+	if err := user_service.BlockUser(ctx, ctx.Org.Organization.ID, u.ID); err != nil {
+		ctx.ServerError("BlockUser", err)
+		return
+	}
+
+	ctx.Flash.Success(ctx.Tr("settings.user_block_success"))
+	ctx.Redirect(ctx.Org.OrgLink + "/settings/blocked_users")
+}
+
+// BlockedUsersUnblock unblocks a particular user from the organization.
+func BlockedUsersUnblock(ctx *context.Context) {
+	if err := user_model.UnblockUser(ctx, ctx.Org.Organization.ID, ctx.FormInt64("user_id")); err != nil {
+		ctx.ServerError("BlockUser", err)
+		return
+	}
+
+	ctx.Flash.Success(ctx.Tr("settings.user_unblock_success"))
+	ctx.Redirect(ctx.Org.OrgLink + "/settings/blocked_users")
+}