160 lines
4.3 KiB
Elixir
160 lines
4.3 KiB
Elixir
defmodule FrenzyWeb.PipelineController do
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use FrenzyWeb, :controller
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alias Frenzy.{Repo, Pipeline}
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alias FrenzyWeb.Router.Helpers, as: Routes
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alias FrenzyWeb.Endpoint
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import Ecto.Query
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plug :user_owns_pipeline
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defp user_owns_pipeline(%Plug.Conn{path_params: %{"id" => pipeline_id}} = conn, _opts) do
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user = conn.assigns[:user]
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pipeline = Repo.get(Pipeline, pipeline_id)
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if pipeline.user_id == user.id do
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conn
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|> assign(:pipeline, pipeline)
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else
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conn
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|> put_flash(:error, "You do not have permission to access that resource.")
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|> redirect(to: Routes.group_path(Endpoint, :index))
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|> halt()
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end
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end
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defp user_owns_pipeline(conn, _opts), do: conn
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def index(conn, _params) do
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user = conn.assigns[:user]
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pipelines = Repo.all(from p in Pipeline, where: p.user_id == ^user.id, preload: [:feeds])
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render(conn, "index.html", %{pipelines: pipelines})
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end
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def new(conn, _params) do
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changeset =
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Pipeline.changeset(%Pipeline{}, %{
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name: "",
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stages: "[\n]"
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})
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render(conn, "new.html", %{changeset: changeset})
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end
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def create(conn, %{"pipeline" => %{"name" => name, "stages" => stages_json}}) do
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user = conn.assigns[:user]
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with {:ok, stages} <- Jason.decode(stages_json),
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{:ok, stages} <- validate_pipeline(stages) do
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changeset = Pipeline.changeset(%Pipeline{}, %{user_id: user.id, name: name, stages: stages})
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{:ok, _pipeline} = Repo.insert(changeset)
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conn
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|> put_flash(:info, "Pipeline created")
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|> redirect(to: Routes.pipeline_path(Endpoint, :index))
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else
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{:error, reason} ->
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error_changeset = Pipeline.changeset(%Pipeline{}, %{name: name, stages: stages_json})
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conn
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|> put_flash(:error, "Unable to create pipeline: #{reason}")
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|> render("new.html", %{changeset: error_changeset})
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end
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end
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def show(conn, _params) do
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pipeline = conn.assigns[:pipeline]
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render(conn, "show.html", %{pipeline: pipeline})
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end
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def delete(conn, _params) do
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conn.assigns[:pipeline]
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|> Repo.delete()
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redirect(conn, to: Routes.pipeline_path(Endpoint, :index))
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end
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def edit(conn, _params) do
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pipeline = conn.assigns[:pipeline]
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{:ok, stages_json} = Jason.encode(pipeline.stages, pretty: true)
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render(conn, "edit.html", %{
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pipeline: pipeline,
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name: pipeline.name,
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stages_json: stages_json
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})
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end
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def update(conn, %{"pipeline" => %{"name" => name, "stages" => stages_json}}) do
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pipeline = conn.assigns[:pipeline]
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with {:ok, stages} <- Jason.decode(stages_json),
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{:ok, stages} <- validate_pipeline(stages) do
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changeset = Pipeline.changeset(pipeline, %{name: name, stages: stages})
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{:ok, _pipeline} = Repo.update(changeset)
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conn
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|> put_flash(:info, "Pipeline edited")
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|> redirect(to: Routes.pipeline_path(Endpoint, :show, pipeline.id))
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else
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{:error, reason} ->
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conn
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|> put_flash(:error, "Unable to edit pipeline: #{reason}")
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|> render("edit.html", %{
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pipeline: pipeline,
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name: name,
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stages_json: stages_json
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})
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end
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end
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defp validate_pipeline(stages) do
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stages
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|> Enum.with_index()
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|> Enum.reduce_while({:ok, []}, fn {stage, index}, {:ok, new_stages} ->
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case validate_stage(stage) do
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{:ok, stage} ->
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{:cont, {:ok, new_stages ++ [stage]}}
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{:error, reason} ->
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{:halt, {:error, "invalid stage at index #{index}: #{reason}"}}
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end
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end)
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end
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defp validate_stage(%{"module_name" => module_name, "options" => options}) do
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with true <- module_exists(module_name),
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{:ok, options} <-
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apply(String.to_existing_atom("Elixir." <> module_name), :validate_opts, [
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options
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]) do
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{:ok, %{"module_name" => module_name, "options" => options}}
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else
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false ->
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{:error, "module #{module_name} does not exist"}
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{:error, reason} ->
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{:error, "invalid options for #{module_name}: #{reason}"}
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end
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end
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defp validate_stage(_),
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do: {:error, "pipeline stage must be a map with module_name and options"}
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defp module_exists(module_name) do
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try do
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String.to_existing_atom("Elixir." <> module_name)
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true
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rescue
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ArgumentError ->
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false
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end
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end
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end
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