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60 lines
1.3 KiB
Elixir
60 lines
1.3 KiB
Elixir
defmodule Philomena.ImageFaves do
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@moduledoc """
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The ImageFaves context.
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"""
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import Ecto.Query, warn: false
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alias Ecto.Multi
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alias Philomena.ImageFaves.ImageFave
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alias Philomena.UserStatistics
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alias Philomena.Images.Image
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@doc """
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Creates a image_hide.
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"""
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def create_fave_transaction(image, user) do
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fave =
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%ImageFave{image_id: image.id, user_id: user.id}
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|> ImageFave.changeset(%{})
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image_query =
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Image
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|> where(id: ^image.id)
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Multi.new()
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|> Multi.insert(:fave, fave)
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|> Multi.update_all(:inc_faves_count, image_query, inc: [faves_count: 1])
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|> Multi.run(:inc_fave_stat, fn _repo, _changes ->
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UserStatistics.inc_stat(user, :images_favourited, 1)
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end)
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end
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@doc """
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Deletes a ImageFave.
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"""
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def delete_fave_transaction(image, user) do
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fave_query =
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ImageFave
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|> where(image_id: ^image.id)
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|> where(user_id: ^user.id)
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image_query =
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Image
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|> where(id: ^image.id)
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Multi.new()
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|> Multi.delete_all(:unfave, fave_query)
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|> Multi.run(:dec_faves_count, fn repo, %{unfave: {faves, nil}} ->
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{count, nil} =
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image_query
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|> repo.update_all(inc: [faves_count: -faves])
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UserStatistics.inc_stat(user, :images_favourited, -faves)
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{:ok, count}
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end)
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end
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end
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