151 lines
3.7 KiB
Elixir
151 lines
3.7 KiB
Elixir
defmodule Mobilizon.Posts do
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@moduledoc """
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The Posts context.
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"""
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alias Mobilizon.Actors.Actor
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alias Mobilizon.Events.Tag
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alias Mobilizon.Posts.Post
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alias Mobilizon.Storage.{Page, Repo}
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import Ecto.Query
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require Logger
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@post_preloads [:author, :attributed_to, :picture]
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import EctoEnum
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defenum(PostVisibility, :post_visibility, [
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:public,
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:unlisted,
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:restricted,
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:private
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])
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@spec list_posts_for_stream :: Enum.t()
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def list_posts_for_stream do
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Post
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|> filter_public()
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|> Repo.stream()
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end
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@doc """
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Returns the list of recent posts for a group
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"""
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@spec get_posts_for_group(Actor.t(), integer | nil, integer | nil) :: Page.t()
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def get_posts_for_group(%Actor{id: group_id}, page \\ nil, limit \\ nil) do
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group_id
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|> do_get_posts_for_group()
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|> Page.build_page(page, limit)
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end
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@spec get_public_posts_for_group(Actor.t(), integer | nil, integer | nil) :: Page.t()
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def get_public_posts_for_group(%Actor{id: group_id}, page \\ nil, limit \\ nil) do
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group_id
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|> do_get_posts_for_group()
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|> filter_public()
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|> Page.build_page(page, limit)
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end
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@doc """
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Get a post by it's ID
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"""
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@spec get_post(integer | String.t()) :: Post.t() | nil
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def get_post(nil), do: nil
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def get_post(id), do: Repo.get(Post, id)
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@spec get_post_with_preloads(integer | String.t()) :: Post.t() | nil
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def get_post_with_preloads(id) do
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Post
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|> Repo.get(id)
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|> Repo.preload(@post_preloads)
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end
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@spec get_post_by_slug(String.t()) :: Post.t() | nil
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def get_post_by_slug(nil), do: nil
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def get_post_by_slug(slug), do: Repo.get_by(Post, slug: slug)
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@spec get_post_by_slug_with_preloads(String.t()) :: Post.t() | nil
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def get_post_by_slug_with_preloads(slug) do
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Post
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|> Repo.get_by(slug: slug)
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|> Repo.preload(@post_preloads)
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end
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@doc """
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Get a post by it's URL
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"""
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@spec get_post_by_url(String.t()) :: Post.t() | nil
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def get_post_by_url(url), do: Repo.get_by(Post, url: url)
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@spec get_post_by_url_with_preloads(String.t()) :: Post.t() | nil
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def get_post_by_url_with_preloads(url) do
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Post
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|> Repo.get_by(url: url)
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|> Repo.preload(@post_preloads)
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end
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@doc """
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Creates a post.
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"""
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@spec create_post(map) :: {:ok, Post.t()} | {:error, Ecto.Changeset.t()}
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def create_post(attrs \\ %{}) do
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with {:ok, %Post{} = post} <-
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%Post{}
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|> Post.changeset(attrs)
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|> Repo.insert() do
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{:ok, Repo.preload(post, @post_preloads)}
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end
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end
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@doc """
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Updates a post.
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"""
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@spec update_post(Post.t(), map) :: {:ok, Post.t()} | {:error, Ecto.Changeset.t()}
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def update_post(%Post{} = post, attrs) do
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post
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|> Repo.preload([:tags, :media])
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|> Post.changeset(attrs)
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|> Repo.update()
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end
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@doc """
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Deletes a post
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"""
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@spec delete_post(Post.t()) :: {:ok, Post.t()} | {:error, Ecto.Changeset.t()}
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def delete_post(%Post{} = post), do: Repo.delete(post)
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@doc """
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Returns the list of tags for the post.
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"""
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@spec list_tags_for_post(integer | String.t()) :: [Tag.t()]
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def list_tags_for_post(post_id) do
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{:ok, uuid} = Ecto.UUID.dump(post_id)
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uuid
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|> tags_for_post_query()
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|> Repo.all()
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end
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@spec tags_for_post_query(integer) :: Ecto.Query.t()
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defp tags_for_post_query(post_id) do
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from(
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t in Tag,
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join: p in "posts_tags",
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on: t.id == p.tag_id,
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where: p.post_id == ^post_id
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)
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end
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@spec filter_public(Ecto.Query.t()) :: Ecto.Query.t()
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defp filter_public(query) do
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where(query, [p], p.visibility == ^:public and not p.draft)
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end
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defp do_get_posts_for_group(group_id) do
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Post
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|> where(attributed_to_id: ^group_id)
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|> order_by(desc: :inserted_at)
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|> preload([p], [:author, :attributed_to, :picture])
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end
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end
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