116 lines
3.3 KiB
Elixir
116 lines
3.3 KiB
Elixir
defmodule Mobilizon.Instances do
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@moduledoc """
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The instances context
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"""
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alias Ecto.Adapters.SQL
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alias Mobilizon.Actors.{Actor, Follower}
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alias Mobilizon.Instances.Instance
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alias Mobilizon.Storage.{Page, Repo}
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import Ecto.Query
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@is_null_fragment "CASE WHEN ? IS NULL THEN FALSE ELSE TRUE END"
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@spec instances(Keyword.t()) :: Page.t(Instance.t())
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def instances(options) do
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page = Keyword.get(options, :page)
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limit = Keyword.get(options, :limit)
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order_by = Keyword.get(options, :order_by)
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direction = Keyword.get(options, :direction)
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filter_domain = Keyword.get(options, :filter_domain)
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# suspend_status = Keyword.get(options, :filter_suspend_status)
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follow_status = Keyword.get(options, :filter_follow_status)
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order_by_options = Keyword.new([{direction, order_by}])
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subquery =
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Actor
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|> where(
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[a],
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a.preferred_username == "relay" and a.type == :Application and not is_nil(a.domain)
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)
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|> join(:left, [a], f1 in Follower, on: f1.target_actor_id == a.id)
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|> join(:left, [a], f2 in Follower, on: f2.actor_id == a.id)
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|> select([a, f1, f2], %{
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domain: a.domain,
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has_relay: fragment(@is_null_fragment, a.id),
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following: fragment(@is_null_fragment, f2.id),
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following_approved: f2.approved,
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follower: fragment(@is_null_fragment, f1.id),
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follower_approved: f1.approved
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})
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query =
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Instance
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|> join(:left, [i], s in subquery(subquery), on: i.domain == s.domain)
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|> select([i, s], {i, s})
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|> order_by(^order_by_options)
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query =
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if is_nil(filter_domain) or filter_domain == "" do
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query
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else
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where(query, [i], like(i.domain, ^"%#{filter_domain}%"))
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end
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query =
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case follow_status do
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:following -> where(query, [i, s], s.following == true)
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:followed -> where(query, [i, s], s.follower == true)
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:all -> query
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end
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%Page{elements: elements} = paged_instances = Page.build_page(query, page, limit, :domain)
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%Page{
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paged_instances
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| elements: Enum.map(elements, &convert_instance_meta/1)
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}
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end
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@spec instance(String.t()) :: Instance.t() | nil
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def instance(domain) do
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Instance
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|> where(domain: ^domain)
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|> Repo.one()
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end
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@spec all_domains :: list(Instance.t())
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def all_domains do
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Instance
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|> distinct(true)
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|> select([:domain])
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|> Repo.all()
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end
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@spec refresh :: %{
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:rows => nil | [[term()] | binary()],
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:num_rows => non_neg_integer(),
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optional(atom()) => any()
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}
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def refresh do
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SQL.query!(Repo, "REFRESH MATERIALIZED VIEW instances")
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end
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defp convert_instance_meta(
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{instance,
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%{
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domain: _domain,
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follower: follower,
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follower_approved: follower_approved,
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following: following,
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following_approved: following_approved,
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has_relay: has_relay
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}}
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) do
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instance
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|> Map.put(:follower_status, follow_status(following, following_approved))
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|> Map.put(:followed_status, follow_status(follower, follower_approved))
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|> Map.put(:has_relay, has_relay)
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end
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defp follow_status(true, true), do: :approved
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defp follow_status(true, false), do: :pending
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defp follow_status(false, _), do: :none
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defp follow_status(nil, _), do: :none
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end
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