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603 lines
15 KiB
Elixir
603 lines
15 KiB
Elixir
defmodule Philomena.Images do
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@moduledoc """
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The Images 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.Repo
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alias Philomena.Elasticsearch
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alias Philomena.DuplicateReports.DuplicateReport
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alias Philomena.Images.Image
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alias Philomena.Images.Hider
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alias Philomena.Images.Uploader
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alias Philomena.Images.Tagging
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alias Philomena.ImageFeatures.ImageFeature
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alias Philomena.SourceChanges.SourceChange
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alias Philomena.TagChanges.TagChange
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alias Philomena.Tags
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alias Philomena.Tags.Tag
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alias Philomena.Notifications
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alias Philomena.Interactions
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alias Philomena.Reports.Report
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alias Philomena.Comments
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@doc """
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Gets a single image.
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Raises `Ecto.NoResultsError` if the Image does not exist.
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## Examples
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iex> get_image!(123)
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%Image{}
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iex> get_image!(456)
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** (Ecto.NoResultsError)
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"""
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def get_image!(id) do
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Repo.one!(Image |> where(id: ^id) |> preload(:tags))
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end
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@doc """
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Creates a image.
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## Examples
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iex> create_image(%{field: value})
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{:ok, %Image{}}
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iex> create_image(%{field: bad_value})
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{:error, %Ecto.Changeset{}}
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"""
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def create_image(attribution, attrs \\ %{}) do
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tags = Tags.get_or_create_tags(attrs["tag_input"])
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image =
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%Image{}
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|> Image.creation_changeset(attrs, attribution)
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|> Image.tag_changeset(attrs, [], tags)
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|> Uploader.analyze_upload(attrs)
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Multi.new()
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|> Multi.insert(:image, image)
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|> Multi.run(:name_caches, fn repo, %{image: image} ->
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image
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|> Image.cache_changeset()
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|> repo.update()
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end)
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|> Multi.run(:source_change, fn repo, %{image: image} ->
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%SourceChange{image_id: image.id, initial: true}
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|> SourceChange.creation_changeset(attrs, attribution)
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|> repo.insert()
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end)
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|> Multi.run(:added_tag_count, fn repo, %{image: image} ->
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tag_ids = image.added_tags |> Enum.map(& &1.id)
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tags = Tag |> where([t], t.id in ^tag_ids)
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{count, nil} = repo.update_all(tags, inc: [images_count: 1])
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{:ok, count}
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end)
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|> Multi.run(:subscribe, fn _repo, %{image: image} ->
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create_subscription(image, attribution[:user])
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end)
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|> Multi.run(:after, fn _repo, %{image: image} ->
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Uploader.persist_upload(image)
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Uploader.unpersist_old_upload(image)
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{:ok, nil}
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end)
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|> Repo.isolated_transaction(:serializable)
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end
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def feature_image(featurer, %Image{} = image) do
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image = Repo.preload(image, :tags)
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[featured] = Tags.get_or_create_tags("featured image")
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feature =
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%ImageFeature{user_id: featurer.id, image_id: image.id}
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|> ImageFeature.changeset(%{})
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image =
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image
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|> Image.tag_changeset(%{}, image.tags, [featured | image.tags])
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|> Image.cache_changeset()
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Multi.new()
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|> Multi.insert(:feature, feature)
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|> Multi.update(:image, image)
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|> Multi.run(:added_tag_count, fn repo, %{image: image} ->
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tag_ids = image.added_tags |> Enum.map(& &1.id)
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tags = Tag |> where([t], t.id in ^tag_ids)
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{count, nil} = repo.update_all(tags, inc: [images_count: 1])
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{:ok, count}
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end)
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|> Repo.isolated_transaction(:serializable)
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end
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def lock_comments(%Image{} = image, locked) do
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image
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|> Image.lock_comments_changeset(locked)
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|> Repo.update()
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end
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def lock_description(%Image{} = image, locked) do
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image
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|> Image.lock_description_changeset(locked)
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|> Repo.update()
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end
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def lock_tags(%Image{} = image, locked) do
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image
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|> Image.lock_tags_changeset(locked)
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|> Repo.update()
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end
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def remove_hash(%Image{} = image) do
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image
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|> Image.remove_hash_changeset()
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|> Repo.update()
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end
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def update_scratchpad(%Image{} = image, attrs) do
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image
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|> Image.scratchpad_changeset(attrs)
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|> Repo.update()
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end
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def remove_source_history(%Image{} = image) do
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image
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|> Repo.preload(:source_changes)
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|> Image.remove_source_history_changeset()
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|> Repo.update()
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end
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def repair_image(%Image{} = image) do
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Image
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|> where(id: ^image.id)
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|> Repo.update_all(set: [thumbnails_generated: false, processed: false])
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Philomena.Images.Thumbnailer.generate_thumbnails(image.id)
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end
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def update_file(%Image{} = image, attrs) do
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image =
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image
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|> Image.changeset(attrs)
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|> Uploader.analyze_upload(attrs)
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Multi.new()
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|> Multi.update(:image, image)
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|> Multi.run(:after, fn _repo, %{image: image} ->
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Uploader.persist_upload(image)
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Uploader.unpersist_old_upload(image)
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{:ok, nil}
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end)
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|> Repo.isolated_transaction(:serializable)
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end
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@doc """
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Updates a image.
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## Examples
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iex> update_image(image, %{field: new_value})
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{:ok, %Image{}}
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iex> update_image(image, %{field: bad_value})
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{:error, %Ecto.Changeset{}}
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"""
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def update_image(%Image{} = image, attrs) do
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image
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|> Image.changeset(attrs)
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|> Repo.update()
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end
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def update_description(%Image{} = image, attrs) do
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image
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|> Image.description_changeset(attrs)
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|> Repo.update()
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end
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def update_source(%Image{} = image, attribution, attrs) do
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image_changes =
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image
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|> Image.source_changeset(attrs)
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source_changes =
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Ecto.build_assoc(image, :source_changes)
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|> SourceChange.creation_changeset(attrs, attribution)
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Multi.new()
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|> Multi.update(:image, image_changes)
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|> Multi.run(:source_change, fn repo, _changes ->
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case image_changes.changes do
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%{source_url: _new_source} ->
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repo.insert(source_changes)
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_ ->
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{:ok, nil}
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end
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end)
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|> Repo.isolated_transaction(:serializable)
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end
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def update_tags(%Image{} = image, attribution, attrs) do
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old_tags = Tags.get_or_create_tags(attrs["old_tag_input"])
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new_tags = Tags.get_or_create_tags(attrs["tag_input"])
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Multi.new()
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|> Multi.run(:image, fn repo, _chg ->
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image
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|> repo.preload(:tags)
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|> Image.tag_changeset(%{}, old_tags, new_tags)
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|> repo.update()
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|> case do
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{:ok, image} ->
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{:ok, {image, image.added_tags, image.removed_tags}}
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error ->
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error
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end
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end)
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|> Multi.run(:added_tag_changes, fn repo, %{image: {image, added_tags, _removed}} ->
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tag_changes =
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added_tags
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|> Enum.map(&tag_change_attributes(attribution, image, &1, true, attribution[:user]))
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{count, nil} = repo.insert_all(TagChange, tag_changes)
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{:ok, count}
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end)
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|> Multi.run(:removed_tag_changes, fn repo, %{image: {image, _added, removed_tags}} ->
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tag_changes =
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removed_tags
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|> Enum.map(&tag_change_attributes(attribution, image, &1, false, attribution[:user]))
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{count, nil} = repo.insert_all(TagChange, tag_changes)
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{:ok, count}
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end)
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|> Multi.run(:added_tag_count, fn
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_repo, %{image: {%{hidden_from_users: true}, _added, _removed}} ->
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{:ok, 0}
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repo, %{image: {_image, added_tags, _removed}} ->
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tag_ids = added_tags |> Enum.map(& &1.id)
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tags = Tag |> where([t], t.id in ^tag_ids)
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{count, nil} = repo.update_all(tags, inc: [images_count: 1])
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{:ok, count}
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end)
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|> Multi.run(:removed_tag_count, fn
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_repo, %{image: {%{hidden_from_users: true}, _added, _removed}} ->
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{:ok, 0}
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repo, %{image: {_image, _added, removed_tags}} ->
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tag_ids = removed_tags |> Enum.map(& &1.id)
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tags = Tag |> where([t], t.id in ^tag_ids)
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{count, nil} = repo.update_all(tags, inc: [images_count: -1])
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{:ok, count}
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end)
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|> Repo.isolated_transaction(:serializable)
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end
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defp tag_change_attributes(attribution, image, tag, added, user) do
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now = NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second)
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user_id =
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case user do
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nil -> nil
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user -> user.id
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end
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%{
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image_id: image.id,
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tag_id: tag.id,
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user_id: user_id,
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created_at: now,
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updated_at: now,
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tag_name_cache: tag.name,
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ip: attribution[:ip],
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fingerprint: attribution[:fingerprint],
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user_agent: attribution[:user_agent],
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referrer: attribution[:referrer],
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added: added
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}
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end
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def update_uploader(%Image{} = image, attrs) do
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image
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|> Image.uploader_changeset(attrs)
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|> Repo.update()
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end
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def hide_image(%Image{} = image, user, attrs) do
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DuplicateReport
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|> where(state: "open")
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|> where([d], d.image_id == ^image.id or d.duplicate_of_image_id == ^image.id)
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|> Repo.update_all(set: [state: "rejected"])
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Image.hide_changeset(image, attrs, user)
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|> internal_hide_image(image)
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end
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def update_hide_reason(%Image{} = image, attrs) do
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image
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|> Image.hide_reason_changeset(attrs)
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|> Repo.update()
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end
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def merge_image(%Image{} = image, duplicate_of_image) do
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result =
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Image.merge_changeset(image, duplicate_of_image)
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|> internal_hide_image(image)
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case result do
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{:ok, changes} ->
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update_first_seen_at(
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duplicate_of_image,
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image.first_seen_at,
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duplicate_of_image.first_seen_at
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)
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tags = Tags.copy_tags(image, duplicate_of_image)
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Comments.migrate_comments(image, duplicate_of_image)
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Interactions.migrate_interactions(image, duplicate_of_image)
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{:ok, %{changes | tags: changes.tags ++ tags}}
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_error ->
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result
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end
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end
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defp update_first_seen_at(image, time_1, time_2) do
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min_time =
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case NaiveDateTime.compare(time_1, time_2) do
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:gt -> time_2
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_ -> time_1
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end
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Image
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|> where(id: ^image.id)
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|> Repo.update_all(set: [first_seen_at: min_time])
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end
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defp internal_hide_image(changeset, image) do
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reports =
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Report
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|> where(reportable_type: "Image", reportable_id: ^image.id)
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|> select([r], r.id)
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|> update(set: [open: false, state: "closed"])
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Multi.new()
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|> Multi.update(:image, changeset)
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|> Multi.update_all(:reports, reports, [])
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|> Multi.run(:tags, fn repo, %{image: image} ->
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image = Repo.preload(image, :tags, force: true)
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# I'm not convinced this is a good idea. It leads
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# to way too much drift, and the index has to be
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# maintained.
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tag_ids = Enum.map(image.tags, & &1.id)
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query = where(Tag, [t], t.id in ^tag_ids)
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repo.update_all(query, inc: [images_count: -1])
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{:ok, image.tags}
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end)
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|> Multi.run(:file, fn _repo, %{image: image} ->
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Hider.hide_thumbnails(image, image.hidden_image_key)
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{:ok, nil}
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end)
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|> Repo.isolated_transaction(:serializable)
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end
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def unhide_image(%Image{hidden_from_users: true} = image) do
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key = image.hidden_image_key
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Multi.new()
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|> Multi.update(:image, Image.unhide_changeset(image))
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|> Multi.run(:tags, fn repo, %{image: image} ->
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image = Repo.preload(image, :tags, force: true)
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tag_ids = Enum.map(image.tags, & &1.id)
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query = where(Tag, [t], t.id in ^tag_ids)
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repo.update_all(query, inc: [images_count: 1])
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{:ok, image.tags}
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end)
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|> Multi.run(:file, fn _repo, %{image: image} ->
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Hider.unhide_thumbnails(image, key)
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{:ok, nil}
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end)
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|> Repo.isolated_transaction(:serializable)
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end
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def unhide_image(image), do: {:ok, image}
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def batch_update(image_ids, added_tags, removed_tags, tag_change_attributes) do
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image_ids =
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Image
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|> where([i], i.id in ^image_ids and i.hidden_from_users == false)
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|> select([i], i.id)
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|> Repo.all()
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added_tags = Enum.map(added_tags, & &1.id)
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removed_tags = Enum.map(removed_tags, & &1.id)
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# Change everything in one go, ignoring any validation errors
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# Note: computing the Cartesian product
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insertions =
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for tag_id <- added_tags, image_id <- image_ids do
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%{tag_id: tag_id, image_id: image_id}
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end
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deletions =
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Tagging
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|> where([t], t.image_id in ^image_ids and t.tag_id in ^removed_tags)
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|> select([t], [t.image_id, t.tag_id])
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now = NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second)
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tag_change_attributes = Map.merge(tag_change_attributes, %{created_at: now, updated_at: now})
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Repo.transaction(fn ->
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{added_count, inserted} =
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Repo.insert_all(Tagging, insertions,
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on_conflict: :nothing,
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returning: [:image_id, :tag_id]
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)
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{removed_count, deleted} = Repo.delete_all(deletions)
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inserted = Enum.map(inserted, &[&1.image_id, &1.tag_id])
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added_changes =
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Enum.map(inserted, fn [image_id, tag_id] ->
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Map.merge(tag_change_attributes, %{image_id: image_id, tag_id: tag_id, added: true})
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end)
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removed_changes =
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Enum.map(deleted, fn [image_id, tag_id] ->
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Map.merge(tag_change_attributes, %{image_id: image_id, tag_id: tag_id, added: false})
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end)
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changes = added_changes ++ removed_changes
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Repo.insert_all(TagChange, changes)
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Repo.update_all(where(Tag, [t], t.id in ^added_tags), inc: [images_count: added_count])
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Repo.update_all(where(Tag, [t], t.id in ^removed_tags), inc: [images_count: -removed_count])
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end)
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end
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@doc """
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Deletes a Image.
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## Examples
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iex> delete_image(image)
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{:ok, %Image{}}
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iex> delete_image(image)
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{:error, %Ecto.Changeset{}}
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"""
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def delete_image(%Image{} = image) do
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Repo.delete(image)
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end
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@doc """
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Returns an `%Ecto.Changeset{}` for tracking image changes.
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## Examples
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iex> change_image(image)
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%Ecto.Changeset{source: %Image{}}
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"""
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def change_image(%Image{} = image) do
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Image.changeset(image, %{})
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end
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def reindex_image(%Image{} = image) do
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reindex_images([image.id])
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image
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end
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def reindex_images(image_ids) do
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spawn(fn ->
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Image
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|> preload(^indexing_preloads())
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|> where([i], i.id in ^image_ids)
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|> Elasticsearch.reindex(Image)
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end)
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image_ids
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end
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def indexing_preloads do
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[
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:user,
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:favers,
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:downvoters,
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|
:upvoters,
|
|
:hiders,
|
|
:deleter,
|
|
:gallery_interactions,
|
|
tags: [:aliases, :aliased_tag]
|
|
]
|
|
end
|
|
|
|
alias Philomena.Images.Subscription
|
|
|
|
def subscribed?(_image, nil), do: false
|
|
|
|
def subscribed?(image, user) do
|
|
Subscription
|
|
|> where(image_id: ^image.id, user_id: ^user.id)
|
|
|> Repo.exists?()
|
|
end
|
|
|
|
@doc """
|
|
Creates a subscription.
|
|
|
|
## Examples
|
|
|
|
iex> create_subscription(%{field: value})
|
|
{:ok, %Subscription{}}
|
|
|
|
iex> create_subscription(%{field: bad_value})
|
|
{:error, %Ecto.Changeset{}}
|
|
|
|
"""
|
|
def create_subscription(_image, nil), do: {:ok, nil}
|
|
|
|
def create_subscription(image, user) do
|
|
%Subscription{image_id: image.id, user_id: user.id}
|
|
|> Subscription.changeset(%{})
|
|
|> Repo.insert(on_conflict: :nothing)
|
|
end
|
|
|
|
@doc """
|
|
Deletes a Subscription.
|
|
|
|
## Examples
|
|
|
|
iex> delete_subscription(subscription)
|
|
{:ok, %Subscription{}}
|
|
|
|
iex> delete_subscription(subscription)
|
|
{:error, %Ecto.Changeset{}}
|
|
|
|
"""
|
|
def delete_subscription(image, user) do
|
|
clear_notification(image, user)
|
|
|
|
%Subscription{image_id: image.id, user_id: user.id}
|
|
|> Repo.delete()
|
|
end
|
|
|
|
def clear_notification(_image, nil), do: nil
|
|
|
|
def clear_notification(image, user) do
|
|
Notifications.delete_unread_notification("Image", image.id, user)
|
|
end
|
|
end
|