feat: add job matches and system tags functionality

- Introduced a new `JobMatch` schema and migration to create the `job_matches` table, allowing for tracking job applications with user references and statuses.
- Added a `system_tags` field to the `JobPosting` schema, enabling categorization of job postings with an array of strings.
- Updated job listing logic to include `JobMatch` in the query for enhanced filtering and ordering capabilities.

Author: zcesur

lib/algora/jobs/jobs.ex

@@ -13,6 +13,7 @@ defmodule Algora.Jobs do
   alias Algora.Repo
   alias Algora.Util
   alias AlgoraCloud.Interviews.JobInterview
+  alias AlgoraCloud.Matches.JobMatch
 
   require Logger
 
@@ -23,10 +24,12 @@ defmodule Algora.Jobs do
     |> join(:inner, [j], u in User, on: u.id == j.user_id)
     |> maybe_filter_by_tech_stack(opts[:tech_stack])
     |> join(:left, [j], i in JobInterview, on: i.job_posting_id == j.id)
-    |> group_by([j, u, i], [u.contract_signed, j.id, j.inserted_at])
-    |> order_by([j, u, i],
+    |> join(:left, [j], m in JobMatch, on: m.job_posting_id == j.id)
+    |> group_by([j, u, i, m], [u.contract_signed, j.id, j.inserted_at])
+    |> order_by([j, u, i, m],
       desc: u.contract_signed,
       desc_nulls_last: max(i.inserted_at),
+      desc_nulls_last: max(m.inserted_at),
       desc: j.inserted_at
     )
     |> maybe_limit(opts[:limit])

lib/algora/jobs/schemas/job_posting.ex

@@ -22,9 +22,11 @@ defmodule Algora.Jobs.JobPosting do
     field :regions, {:array, :string}, default: []
     field :compensation, :string
     field :seniority, :string
+    field :system_tags, {:array, :string}, default: []
 
     belongs_to :user, User, null: false
     has_many :interviews, AlgoraCloud.Interviews.JobInterview, foreign_key: :job_posting_id
+    has_many :matches, AlgoraCloud.Matches.JobMatch, foreign_key: :job_posting_id
 
     timestamps()
   end
@@ -46,7 +48,8 @@ defmodule Algora.Jobs.JobPosting do
       :compensation,
       :seniority,
       :countries,
-      :regions
+      :regions,
+      :system_tags
     ])
     |> generate_id()
     |> validate_required([:url, :company_name, :company_url, :email])

priv/repo/migrations/20250709083713_create_job_matches.exs

@@ -0,0 +1,23 @@
+defmodule Algora.Repo.Migrations.CreateJobMatches do
+  use Ecto.Migration
+
+  def change do
+    create table(:job_matches) do
+      add :user_id, references(:users, on_delete: :delete_all, type: :string), null: false
+
+      add :job_posting_id, references(:job_postings, on_delete: :delete_all, type: :string),
+        null: false
+
+      add :status, :string, null: false, default: "pending"
+      add :score, :decimal, precision: 5, scale: 2
+      add :notes, :text
+
+      timestamps()
+    end
+
+    create unique_index(:job_matches, [:user_id, :job_posting_id])
+    create index(:job_matches, [:user_id])
+    create index(:job_matches, [:job_posting_id])
+    create index(:job_matches, [:status])
+  end
+end

priv/repo/migrations/20250709084125_add_system_tags_to_job_postings.exs

@@ -0,0 +1,9 @@
+defmodule Algora.Repo.Migrations.AddSystemTagsToJobPostings do
+  use Ecto.Migration
+
+  def change do
+    alter table(:job_postings) do
+      add :system_tags, {:array, :string}, default: []
+    end
+  end
+end