Add ability to create, update, and delete job posts

This PR implements the ability for members to create, update and
delete job posts. It introduces the following important changes:

* Creates a `job_posts` database table.
* Creates a `job_posts_hisory` database table for tracking updates on
the `job_posts` table.
* Creates a `Jobs` context to house the functionality related to job
posts.
* Creates a `Jobs.Post` Ecto schema.
* Creates a `Jobs.PostHistoryEntry` Ecto schema.
* Creates a `JobController` which allows a user to create, update and
delete their own job posts.
* Adds a basic authorization logic in the context and controller.
* Adds a section in the basic member profile for managing job posts.
* Adds notification logic after a post is created.

This PR also introduces some minor changes which can be viewed as
placeholders for later iterations:

* Adds a top navigation entry for "Jobs".
* Adds a job posts index page where approved job posts are listed.
* Adds a mechanism for approving job posts by administrators.
* Adds notification logic after a post is approved.
* Associates members with sponsors.

config/config.exs

@@ -59,6 +59,11 @@ config :ex_aws,
     host: "ewr1.vultrobjects.com"
   ]
 
+config :erlef, Oban,
+  repo: Erlef.Repo,
+  plugins: [Oban.Plugins.Pruner],
+  queues: [default: 10]
+
 # Import environment specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.
 import_config "#{Mix.env()}.exs"

config/test.exs

@@ -56,4 +56,6 @@ config :honeybadger,
   api_key: "test",
   exclude_envs: [:test]
 
+config :erlef, Oban, testing: :inline
+
 config :erlef, api_key: "key"

lib/erlef/accounts/member.ex

@@ -1,6 +1,9 @@
 defmodule Erlef.Accounts.Member do
   use Erlef.Schema
 
+  alias Erlef.Jobs.Post
+  alias Erlef.Groups.Sponsor
+
   @moduledoc """
   Erlef.Accounts.Member provides a schema and helper functions for working with erlef members.
 
@@ -59,7 +62,12 @@ defmodule Erlef.Accounts.Member do
     field(:has_requested_slack_invite, :boolean, default: false)
     field(:requested_slack_invite_at, :utc_datetime)
     field(:deactivated_at, :utc_datetime)
+
     embeds_one(:external, Erlef.Accounts.External, on_replace: :update)
+
+    belongs_to(:sponsor, Sponsor)
+    has_many(:posts, Post, foreign_key: :created_by)
+
     timestamps()
   end
 
@@ -84,7 +92,8 @@ defmodule Erlef.Accounts.Member do
     :requested_slack_invite_at,
     :suspended_member,
     :terms_of_use_accepted,
-    :deactivated_at
+    :deactivated_at,
+    :sponsor_id
   ]
 
   @required_fields [

lib/erlef/admins.ex

@@ -32,7 +32,8 @@ defmodule Erlef.Admins do
     (select count(id) from volunteers), 
     (select count(id) from working_groups), 
     (select count(id) from sponsors),
-    (select count(id) from events where events.approved = false), 
+    (select count(id) from events where events.approved = false),
+    (select count(id) from job_posts where job_posts.approved = false),
     (select count(id) from member_email_requests where member_email_requests.status != 'complete'),
     (select count(id) from apps)
     """
@@ -44,6 +45,7 @@ defmodule Erlef.Admins do
           working_group_count,
           sponsors_count,
           unapproved_events_count,
+          unapproved_job_posts_count,
           outstanding_email_requests_count,
           apps_count
         ]
@@ -55,6 +57,7 @@ defmodule Erlef.Admins do
       working_groups_count: working_group_count,
       sponsors_count: sponsors_count,
       unapproved_events_count: unapproved_events_count,
+      unapproved_job_posts_count: unapproved_job_posts_count,
       outstanding_email_requests_count: outstanding_email_requests_count,
       apps_count: apps_count
     }

lib/erlef/admins/notifications.ex

@@ -3,7 +3,8 @@ defmodule Erlef.Admins.Notifications do
 
   import Swoosh.Email
 
-  @type notification_type() :: :new_email_request | :new_event_submitted | :new_slack_invite
+  @type notification_type() ::
+          :new_email_request | :new_event_submitted | :new_slack_invite | :new_job_post_submitted
 
   @type params() :: map()
 
@@ -31,4 +32,16 @@ defmodule Erlef.Admins.Notifications do
     |> subject("A new event was submitted")
     |> text_body(msg)
   end
+
+  def new_job_post_submission() do
+    msg = """
+    A new job post was submitted. Visit https://erlef.org/admin/ to view unapproved events.
+    """
+
+    new()
+    |> to({"Website Admins", "[email protected]"})
+    |> from({"Erlef Notifications", "[email protected]"})
+    |> subject("A new job poar was submitted")
+    |> text_body(msg)
+  end
 end

lib/erlef/application.ex

@@ -29,6 +29,7 @@ defmodule Erlef.Application do
   defp base_children() do
     [
       Erlef.Repo,
+      {Oban, Application.fetch_env!(:erlef, Oban)},
       Erlef.Repo.ETS,
       Erlef.Repo.ETS.Importer,
       ErlefWeb.Telemetry,

lib/erlef/groups/sponsor.ex

@@ -1,7 +1,10 @@
 defmodule Erlef.Groups.Sponsor do
   @moduledoc false
+
   use Erlef.Schema
 
+  alias Erlef.Accounts.Member
+
   schema "sponsors" do
     field(:active, :boolean, default: true)
     field(:logo, :string, virtual: true)
@@ -12,6 +15,9 @@ defmodule Erlef.Groups.Sponsor do
     field(:created_by, Ecto.UUID)
     field(:updated_by, Ecto.UUID)
 
+    has_many(:members, Member)
+    has_many(:posts, through: [:members, :posts])
+
     timestamps()
   end