File size: 1,839 Bytes
936b397 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | defmodule Plausible.Funnel do
@min_steps 2
@max_steps 8
@moduledoc """
A funnel is a marketing term used to capture and describe the journey
that users go through, from initial step to conversion.
A funnel consists of several steps (here: #{@min_steps}..#{@max_steps}).
This module defines the database schema for storing funnels
and changeset helpers for enumerating the steps within.
Each step references a goal (either a Custom Event or Visit)
- see: `Plausible.Goal`.
"""
use Ecto.Schema
import Ecto.Changeset
alias Plausible.Funnel.Step
defmacro min_steps() do
quote do
unquote(@min_steps)
end
end
defmacro max_steps() do
quote do
unquote(@max_steps)
end
end
defmacro __using__(_opts \\ []) do
quote do
require Plausible.Funnel
alias Plausible.Funnel
end
end
@type t() :: %__MODULE__{}
schema "funnels" do
field :name, :string
field :strict_order, :boolean, default: false
belongs_to :site, Plausible.Site
has_many :steps, Step,
preload_order: [
asc: :step_order
],
on_replace: :delete
has_many :goals, through: [:steps, :goal]
timestamps()
end
def changeset(funnel \\ %__MODULE__{}, attrs \\ %{}) do
funnel
|> cast(attrs, [:name, :strict_order])
|> validate_required([:name])
|> put_steps(attrs[:steps] || attrs["steps"])
|> validate_length(:steps, min: @min_steps, max: @max_steps)
|> unique_constraint(:name,
name: :funnels_name_site_id_index
)
end
def put_steps(changeset, steps) do
steps
|> Enum.map(&Step.changeset(%Step{}, &1))
|> Enum.with_index(fn step, step_order ->
Ecto.Changeset.put_change(step, :step_order, step_order + 1)
end)
|> then(&Ecto.Changeset.put_assoc(changeset, :steps, &1))
end
end
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