kopia lustrzana https://github.com/fediversespace/fediverse.space
56 wiersze
1.5 KiB
Elixir
56 wiersze
1.5 KiB
Elixir
defmodule Backend.Api do
|
|
alias Backend.{Edge, Instance, Repo}
|
|
import Backend.Util
|
|
import Ecto.Query
|
|
|
|
@spec list_instances() :: [Instance.t()]
|
|
def list_instances() do
|
|
Instance
|
|
|> Repo.all()
|
|
end
|
|
|
|
@spec get_instance!(String.t()) :: Instance.t()
|
|
def get_instance!(domain) do
|
|
Instance
|
|
|> preload(:peers)
|
|
|> Repo.get_by!(domain: domain)
|
|
end
|
|
|
|
@doc """
|
|
Returns a list of instances that
|
|
* have a user count (required to give the instance a size on the graph)
|
|
* the user count is > the threshold
|
|
* have x and y coordinates
|
|
"""
|
|
@spec list_nodes() :: [Instance.t()]
|
|
def list_nodes() do
|
|
user_threshold = get_config(:personal_instance_threshold)
|
|
|
|
Instance
|
|
|> where(
|
|
[i],
|
|
not is_nil(i.x) and not is_nil(i.y) and not is_nil(i.user_count) and
|
|
i.user_count >= ^user_threshold
|
|
)
|
|
|> select([c], [:domain, :user_count, :x, :y])
|
|
|> Repo.all()
|
|
end
|
|
|
|
@spec list_edges() :: [Edge.t()]
|
|
def list_edges() do
|
|
user_threshold = get_config(:personal_instance_threshold)
|
|
|
|
Edge
|
|
|> join(:inner, [e], i1 in Instance, on: e.source_domain == i1.domain)
|
|
|> join(:inner, [e], i2 in Instance, on: e.target_domain == i2.domain)
|
|
|> select([e], [:id, :source_domain, :target_domain, :weight])
|
|
|> where(
|
|
[e, i1, i2],
|
|
not is_nil(i1.x) and not is_nil(i1.y) and
|
|
not is_nil(i2.x) and not is_nil(i2.y) and
|
|
i1.user_count >= ^user_threshold and i2.user_count >= ^user_threshold
|
|
)
|
|
|> Repo.all()
|
|
end
|
|
end
|