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	diff --git a/lib/pleroma/announcement.ex b/lib/pleroma/announcement.ex
	index 8c15d5bdf..6c11eff7e 100644
	--- a/lib/pleroma/announcement.ex
	+++ b/lib/pleroma/announcement.ex
	@@ -1,127 +1,134 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Announcement do
	use Ecto.Schema

	import Ecto.Changeset, only: [cast: 3, validate_required: 2]
	import Ecto.Query

	alias Pleroma.AnnouncementReadRelationship
	alias Pleroma.Repo

	@type t :: %__MODULE__{}
	@primary_key {:id, FlakeId.Ecto.CompatType, autogenerate: true}

	schema "announcements" do
	field(:data, :map)
	field(:starts_at, :naive_datetime)
	field(:ends_at, :naive_datetime)

	timestamps()
	end

	def change(struct, params \\ %{}) do
	struct
	\|> cast(validate_params(struct, params), [:data, :starts_at, :ends_at])
	\|> validate_required([:data])
	end

	defp validate_params(struct, params) do
	base_data =
	%{
	"content" => "",
	"all_day" => false
	}
	\|> Map.merge((struct && struct.data) \|\| %{})

	merged_data =
	Map.merge(base_data, params.data)
	\|> Map.take(["content", "all_day"])

	params
	\|> Map.merge(%{data: merged_data})
	end

	def add(params) do
	changeset = change(%__MODULE__{}, params)

	Repo.insert(changeset)
	end

	def update(announcement, params) do
	changeset = change(announcement, params)

	Repo.update(changeset)
	end

	def list_all do
	__MODULE__
	\|> Repo.all()
	end

	+ def list_paginated(%{limit: limited_number, offset: offset_number}) do
	+ __MODULE__
	+ \|> limit(^limited_number)
	+ \|> offset(^offset_number)
	+ \|> Repo.all()
	+ end
	+
	def get_by_id(id) do
	Repo.get_by(__MODULE__, id: id)
	end

	def delete_by_id(id) do
	with announcement when not is_nil(announcement) <- get_by_id(id),
	{:ok, _} <- Repo.delete(announcement) do
	:ok
	else
	_ ->
	:error
	end
	end

	def read_by?(announcement, user) do
	AnnouncementReadRelationship.exists?(user, announcement)
	end

	def mark_read_by(announcement, user) do
	AnnouncementReadRelationship.mark_read(user, announcement)
	end

	def render_json(announcement, opts \\ []) do
	extra_params =
	case Keyword.fetch(opts, :for) do
	{:ok, user} when not is_nil(user) ->
	%{read: read_by?(announcement, user)}

	_ ->
	%{}
	end

	base = %{
	id: announcement.id,
	content: announcement.data["content"],
	starts_at: announcement.starts_at,
	ends_at: announcement.ends_at,
	all_day: announcement.data["all_day"],
	published_at: announcement.inserted_at,
	updated_at: announcement.updated_at,
	mentions: [],
	statuses: [],
	tags: [],
	emojis: [],
	reactions: []
	}

	base
	\|> Map.merge(extra_params)
	end

	# "visible" means:
	# starts_at < time < ends_at
	def list_all_visible_when(time) do
	__MODULE__
	\|> where([a], is_nil(a.starts_at) or a.starts_at < ^time)
	\|> where([a], is_nil(a.ends_at) or a.ends_at > ^time)
	\|> Repo.all()
	end

	def list_all_visible do
	list_all_visible_when(NaiveDateTime.utc_now())
	end
	end
	diff --git a/lib/pleroma/web/admin_api/controllers/announcement_controller.ex b/lib/pleroma/web/admin_api/controllers/announcement_controller.ex
	index 6195e582a..6ad5fc12c 100644
	--- a/lib/pleroma/web/admin_api/controllers/announcement_controller.ex
	+++ b/lib/pleroma/web/admin_api/controllers/announcement_controller.ex
	@@ -1,78 +1,83 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.AdminAPI.AnnouncementController do
	use Pleroma.Web, :controller

	alias Pleroma.Announcement
	alias Pleroma.Web.ControllerHelper
	alias Pleroma.Web.Plugs.OAuthScopesPlug

	plug(Pleroma.Web.ApiSpec.CastAndValidate)
	plug(OAuthScopesPlug, %{scopes: ["admin:write"]} when action in [:create, :delete, :change])
	plug(OAuthScopesPlug, %{scopes: ["admin:read"]} when action in [:index, :show])
	action_fallback(Pleroma.Web.AdminAPI.FallbackController)

	defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.Admin.AnnouncementOperation

	- def index(conn, _params) do
	- announcements = Announcement.list_all()
	+ defp default_limit, do: 20
	+
	+ def index(conn, params) do
	+ limit = Map.get(params, :limit, default_limit())
	+ offset = Map.get(params, :offset, 0)
	+
	+ announcements = Announcement.list_paginated(%{limit: limit, offset: offset})

	render(conn, "index.json", announcements: announcements)
	end

	def show(conn, %{id: id} = _params) do
	announcement = Announcement.get_by_id(id)

	if is_nil(announcement) do
	{:error, :not_found}
	else
	render(conn, "show.json", announcement: announcement)
	end
	end

	def create(%{body_params: params} = conn, _params) do
	with {:ok, announcement} <- Announcement.add(change_params(params)) do
	render(conn, "show.json", announcement: announcement)
	else
	_ ->
	{:error, 400}
	end
	end

	def change_params(orig_params) do
	data =
	%{}
	\|> Pleroma.Maps.put_if_present("content", orig_params, &Map.fetch(&1, :content))
	\|> Pleroma.Maps.put_if_present("all_day", orig_params, &Map.fetch(&1, :all_day))

	orig_params
	\|> Map.merge(%{data: data})
	end

	def change(%{body_params: params} = conn, %{id: id} = _params) do
	with announcement <- Announcement.get_by_id(id),
	{:exists, true} <- {:exists, not is_nil(announcement)},
	{:ok, announcement} <- Announcement.update(announcement, change_params(params)) do
	render(conn, "show.json", announcement: announcement)
	else
	{:exists, false} ->
	{:error, :not_found}

	_ ->
	{:error, 400}
	end
	end

	def delete(conn, %{id: id} = _params) do
	case Announcement.delete_by_id(id) do
	:ok ->
	conn
	\|> ControllerHelper.json_response(:ok, %{})

	_ ->
	{:error, :not_found}
	end
	end
	end
	diff --git a/lib/pleroma/web/api_spec/operations/admin/announcement_operation.ex b/lib/pleroma/web/api_spec/operations/admin/announcement_operation.ex
	index cdf04d357..58a039e72 100644
	--- a/lib/pleroma/web/api_spec/operations/admin/announcement_operation.ex
	+++ b/lib/pleroma/web/api_spec/operations/admin/announcement_operation.ex
	@@ -1,149 +1,165 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.ApiSpec.Admin.AnnouncementOperation do
	alias OpenApiSpex.Operation
	alias OpenApiSpex.Schema
	alias Pleroma.Web.ApiSpec.Schemas.Announcement
	alias Pleroma.Web.ApiSpec.Schemas.ApiError

	import Pleroma.Web.ApiSpec.Helpers

	def open_api_operation(action) do
	operation = String.to_existing_atom("#{action}_operation")
	apply(__MODULE__, operation, [])
	end

	def index_operation do
	%Operation{
	tags: ["Announcement managment"],
	summary: "Retrieve a list of announcements",
	operationId: "AdminAPI.AnnouncementController.index",
	security: [%{"oAuth" => ["admin:read"]}],
	+ parameters: [
	+ Operation.parameter(
	+ :limit,
	+ :query,
	+ %Schema{type: :integer, minimum: 1},
	+ "the maximum number of announcements to return"
	+ ),
	+ Operation.parameter(
	+ :offset,
	+ :query,
	+ %Schema{type: :integer, minimum: 0},
	+ "the offset of the first announcement to return"
	+ )
	+ \| admin_api_params()
	+ ],
	responses: %{
	200 => Operation.response("Response", "application/json", list_of_announcements()),
	+ 400 => Operation.response("Forbidden", "application/json", ApiError),
	403 => Operation.response("Forbidden", "application/json", ApiError)
	}
	}
	end

	def show_operation do
	%Operation{
	tags: ["Announcement managment"],
	summary: "Display one announcement",
	operationId: "AdminAPI.AnnouncementController.show",
	security: [%{"oAuth" => ["admin:read"]}],
	parameters: [
	Operation.parameter(
	:id,
	:path,
	:string,
	"announcement id"
	)
	\| admin_api_params()
	],
	responses: %{
	200 => Operation.response("Response", "application/json", Announcement),
	403 => Operation.response("Forbidden", "application/json", ApiError),
	404 => Operation.response("Not Found", "application/json", ApiError)
	}
	}
	end

	def delete_operation do
	%Operation{
	tags: ["Announcement managment"],
	summary: "Delete one announcement",
	operationId: "AdminAPI.AnnouncementController.delete",
	security: [%{"oAuth" => ["admin:write"]}],
	parameters: [
	Operation.parameter(
	:id,
	:path,
	:string,
	"announcement id"
	)
	\| admin_api_params()
	],
	responses: %{
	200 => Operation.response("Response", "application/json", %Schema{type: :object}),
	403 => Operation.response("Forbidden", "application/json", ApiError),
	404 => Operation.response("Not Found", "application/json", ApiError)
	}
	}
	end

	def create_operation do
	%Operation{
	tags: ["Announcement managment"],
	summary: "Create one announcement",
	operationId: "AdminAPI.AnnouncementController.create",
	security: [%{"oAuth" => ["admin:write"]}],
	requestBody: request_body("Parameters", create_request(), required: true),
	responses: %{
	200 => Operation.response("Response", "application/json", Announcement),
	400 => Operation.response("Bad Request", "application/json", ApiError),
	403 => Operation.response("Forbidden", "application/json", ApiError)
	}
	}
	end

	def change_operation do
	%Operation{
	tags: ["Announcement managment"],
	summary: "Change one announcement",
	operationId: "AdminAPI.AnnouncementController.change",
	security: [%{"oAuth" => ["admin:write"]}],
	parameters: [
	Operation.parameter(
	:id,
	:path,
	:string,
	"announcement id"
	)
	\| admin_api_params()
	],
	requestBody: request_body("Parameters", change_request(), required: true),
	responses: %{
	200 => Operation.response("Response", "application/json", Announcement),
	400 => Operation.response("Bad Request", "application/json", ApiError),
	403 => Operation.response("Forbidden", "application/json", ApiError),
	404 => Operation.response("Not Found", "application/json", ApiError)
	}
	}
	end

	defp create_or_change_props do
	%{
	content: %Schema{type: :string},
	starts_at: %Schema{type: :string, format: "date-time", nullable: true},
	ends_at: %Schema{type: :string, format: "date-time", nullable: true},
	all_day: %Schema{type: :boolean}
	}
	end

	def create_request do
	%Schema{
	title: "AnnouncementCreateRequest",
	type: :object,
	required: [:content],
	properties: create_or_change_props()
	}
	end

	def change_request do
	%Schema{
	title: "AnnouncementChangeRequest",
	type: :object,
	properties: create_or_change_props()
	}
	end

	def list_of_announcements do
	%Schema{
	type: :array,
	items: Announcement
	}
	end
	end
	diff --git a/test/pleroma/web/admin_api/controllers/announcement_controller_test.exs b/test/pleroma/web/admin_api/controllers/announcement_controller_test.exs
	index c6b2163d0..56da1c6aa 100644
	--- a/test/pleroma/web/admin_api/controllers/announcement_controller_test.exs
	+++ b/test/pleroma/web/admin_api/controllers/announcement_controller_test.exs
	@@ -1,186 +1,234 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.AdminAPI.AnnouncementControllerTest do
	use Pleroma.Web.ConnCase

	import Pleroma.Factory

	setup do
	admin = insert(:user, is_admin: true)
	token = insert(:oauth_admin_token, user: admin)

	conn =
	build_conn()
	\|> assign(:user, admin)
	\|> assign(:token, token)

	{:ok, %{admin: admin, token: token, conn: conn}}
	end

	describe "GET /api/v1/pleroma/admin/announcements" do
	test "it lists all announcements", %{conn: conn} do
	%{id: id} = insert(:announcement)

	response =
	conn
	\|> get("/api/v1/pleroma/admin/announcements")
	\|> json_response_and_validate_schema(:ok)

	assert [%{"id" => ^id}] = response
	end
	+
	+ test "it paginates announcements", %{conn: conn} do
	+ _announcements = Enum.map(0..20, fn _ -> insert(:announcement) end)
	+
	+ response =
	+ conn
	+ \|> get("/api/v1/pleroma/admin/announcements")
	+ \|> json_response_and_validate_schema(:ok)
	+
	+ assert length(response) == 20
	+ end
	+
	+ test "it paginates announcements with custom params", %{conn: conn} do
	+ announcements = Enum.map(0..20, fn _ -> insert(:announcement) end)
	+
	+ response =
	+ conn
	+ \|> get("/api/v1/pleroma/admin/announcements", limit: 5, offset: 7)
	+ \|> json_response_and_validate_schema(:ok)
	+
	+ assert length(response) == 5
	+ assert Enum.at(response, 0)["id"] == Enum.at(announcements, 7).id
	+ end
	+
	+ test "it returns empty list with out-of-bounds offset", %{conn: conn} do
	+ _announcements = Enum.map(0..20, fn _ -> insert(:announcement) end)
	+
	+ response =
	+ conn
	+ \|> get("/api/v1/pleroma/admin/announcements", offset: 21)
	+ \|> json_response_and_validate_schema(:ok)
	+
	+ assert [] = response
	+ end
	+
	+ test "it rejects invalid pagination params", %{conn: conn} do
	+ conn
	+ \|> get("/api/v1/pleroma/admin/announcements", limit: 0)
	+ \|> json_response_and_validate_schema(400)
	+
	+ conn
	+ \|> get("/api/v1/pleroma/admin/announcements", limit: -1)
	+ \|> json_response_and_validate_schema(400)
	+
	+ conn
	+ \|> get("/api/v1/pleroma/admin/announcements", offset: -1)
	+ \|> json_response_and_validate_schema(400)
	+ end
	end

	describe "GET /api/v1/pleroma/admin/announcements/:id" do
	test "it displays one announcement", %{conn: conn} do
	%{id: id} = insert(:announcement)

	response =
	conn
	\|> get("/api/v1/pleroma/admin/announcements/#{id}")
	\|> json_response_and_validate_schema(:ok)

	assert %{"id" => ^id} = response
	end

	test "it returns not found for non-existent id", %{conn: conn} do
	%{id: id} = insert(:announcement)

	_response =
	conn
	\|> get("/api/v1/pleroma/admin/announcements/#{id}xxx")
	\|> json_response_and_validate_schema(:not_found)
	end
	end

	describe "DELETE /api/v1/pleroma/admin/announcements/:id" do
	test "it deletes specified announcement", %{conn: conn} do
	%{id: id} = insert(:announcement)

	_response =
	conn
	\|> delete("/api/v1/pleroma/admin/announcements/#{id}")
	\|> json_response_and_validate_schema(:ok)
	end

	test "it returns not found for non-existent id", %{conn: conn} do
	%{id: id} = insert(:announcement)

	_response =
	conn
	\|> delete("/api/v1/pleroma/admin/announcements/#{id}xxx")
	\|> json_response_and_validate_schema(:not_found)

	assert %{id: ^id} = Pleroma.Announcement.get_by_id(id)
	end
	end

	describe "PATCH /api/v1/pleroma/admin/announcements/:id" do
	test "it returns not found for non-existent id", %{conn: conn} do
	%{id: id} = insert(:announcement)

	_response =
	conn
	\|> put_req_header("content-type", "application/json")
	\|> patch("/api/v1/pleroma/admin/announcements/#{id}xxx", %{})
	\|> json_response_and_validate_schema(:not_found)

	assert %{id: ^id} = Pleroma.Announcement.get_by_id(id)
	end

	test "it updates a field", %{conn: conn} do
	%{id: id} = insert(:announcement)

	now = NaiveDateTime.utc_now() \|> NaiveDateTime.truncate(:second)
	starts_at = NaiveDateTime.add(now, -10, :second)

	_response =
	conn
	\|> put_req_header("content-type", "application/json")
	\|> patch("/api/v1/pleroma/admin/announcements/#{id}", %{
	starts_at: NaiveDateTime.to_iso8601(starts_at)
	})
	\|> json_response_and_validate_schema(:ok)

	new = Pleroma.Announcement.get_by_id(id)

	assert NaiveDateTime.compare(new.starts_at, starts_at) == :eq
	end

	test "it updates a data field", %{conn: conn} do
	%{id: id} = announcement = insert(:announcement, data: %{"all_day" => true})

	assert announcement.data["all_day"] == true

	new_content = "new content"

	response =
	conn
	\|> put_req_header("content-type", "application/json")
	\|> patch("/api/v1/pleroma/admin/announcements/#{id}", %{
	content: new_content
	})
	\|> json_response_and_validate_schema(:ok)

	assert response["content"] == new_content
	assert response["all_day"] == true

	new = Pleroma.Announcement.get_by_id(id)

	assert new.data["content"] == new_content
	assert new.data["all_day"] == true
	end

	test "it nullifies a nullable field", %{conn: conn} do
	now = NaiveDateTime.utc_now() \|> NaiveDateTime.truncate(:second)
	starts_at = NaiveDateTime.add(now, -10, :second)

	%{id: id} = insert(:announcement, starts_at: starts_at)

	response =
	conn
	\|> put_req_header("content-type", "application/json")
	\|> patch("/api/v1/pleroma/admin/announcements/#{id}", %{
	starts_at: nil
	})
	\|> json_response_and_validate_schema(:ok)

	assert response["starts_at"] == nil

	new = Pleroma.Announcement.get_by_id(id)

	assert new.starts_at == nil
	end
	end

	describe "POST /api/v1/pleroma/admin/announcements" do
	test "it creates an announcement", %{conn: conn} do
	content = "test post announcement api"

	now = NaiveDateTime.utc_now() \|> NaiveDateTime.truncate(:second)
	starts_at = NaiveDateTime.add(now, -10, :second)
	ends_at = NaiveDateTime.add(now, 10, :second)

	response =
	conn
	\|> put_req_header("content-type", "application/json")
	\|> post("/api/v1/pleroma/admin/announcements", %{
	"content" => content,
	"starts_at" => NaiveDateTime.to_iso8601(starts_at),
	"ends_at" => NaiveDateTime.to_iso8601(ends_at),
	"all_day" => true
	})
	\|> json_response_and_validate_schema(:ok)

	assert %{"content" => ^content, "all_day" => true} = response

	announcement = Pleroma.Announcement.get_by_id(response["id"])

	assert not is_nil(announcement)

	assert NaiveDateTime.compare(announcement.starts_at, starts_at) == :eq
	assert NaiveDateTime.compare(announcement.ends_at, ends_at) == :eq
	end
	end
	end

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