From fff4f18327ec551d18da0032db58a39113664bfd Mon Sep 17 00:00:00 2001
From: penny <penny@hexmani.ac>
Date: Sun, 25 Jan 2026 22:12:38 -0500
Subject: [PATCH] feat: Add support for PLC endpoint configuration

---
 config/runtime.exs                   |  3 +++
 lib/atex/config/identity_resolver.ex | 26 ++++++++++++++++++++++++++
 lib/atex/identity_resolver/did.ex    |  3 ++-
 mix.exs                              |  2 +-
 4 files changed, 32 insertions(+), 2 deletions(-)
 create mode 100644 lib/atex/config/identity_resolver.ex

diff --git a/config/runtime.exs b/config/runtime.exs
index 017eb0f..c0faaa5 100644
--- a/config/runtime.exs
+++ b/config/runtime.exs
@@ -8,3 +8,6 @@ config :atex, Atex.OAuth,
   private_key:
     "MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgyIpxhuDm0i3mPkrk6UdX4Sd9Jsv6YtAmSTza+A2nArShRANCAAQLF1GLueOBZOVnKWfrcnoDOO9NSRqH2utmfGMz+Rce18MDB7Z6CwFWjEq2UFYNBI4MI5cMI0+m+UYAmj4OZm+m",
   key_id: "awooga"
+
+config :atex, Atex.IdentityResolver,
+  directory_url: "https://plc.directory"
diff --git a/lib/atex/config/identity_resolver.ex b/lib/atex/config/identity_resolver.ex
new file mode 100644
index 0000000..d7859fa
--- /dev/null
+++ b/lib/atex/config/identity_resolver.ex
@@ -0,0 +1,26 @@
+defmodule Atex.Config.IdentityResolver do
+  @moduledoc """
+  Configuration management for `Atex.IdentityResolver`.
+
+  Contains all configuration logic for fetching identity documents.
+
+  ## Configuration
+
+  The following structure is expected in your application config:
+
+      config :atex, Atex.IdentityResolver,
+        directory_url: "https://plc.directory" # An address to a did:plc document host
+  """
+
+  @doc """
+  Returns the configured URL for PLC queries.
+  """
+  @spec directory_url :: String.t()
+  def directory_url(),
+    do:
+      Keyword.get(
+        Application.get_env(:atex, Atex.IdentityResolver, []),
+        :directory_url,
+        "https://plc.directory"
+      )
+end
diff --git a/lib/atex/identity_resolver/did.ex b/lib/atex/identity_resolver/did.ex
index 2564ea6..3597c93 100644
--- a/lib/atex/identity_resolver/did.ex
+++ b/lib/atex/identity_resolver/did.ex
@@ -1,5 +1,6 @@
 defmodule Atex.IdentityResolver.DID do
   alias Atex.IdentityResolver.DIDDocument
+  alias Atex.Config.IdentityResolver, as: Config
 
   @type resolution_result() ::
           {:ok, DIDDocument.t()}
@@ -14,7 +15,7 @@ defmodule Atex.IdentityResolver.DID do
   @spec resolve_plc(String.t()) :: resolution_result()
   defp resolve_plc("did:plc:" <> _id = did) do
     with {:ok, resp} when resp.status in 200..299 <-
-           Req.get("https://plc.directory/#{did}"),
+           Req.get("#{Config.directory_url()}/#{did}"),
          {:ok, body} <- decode_body(resp.body),
          {:ok, document} <- DIDDocument.from_json(body),
          :ok <- DIDDocument.validate_for_atproto(document, did) do
diff --git a/mix.exs b/mix.exs
index edcd0cc..ce1f309 100644
--- a/mix.exs
+++ b/mix.exs
@@ -69,7 +69,7 @@ defmodule Atex.MixProject do
         XRPC: ~r/^Atex\.XRPC/,
         OAuth: [Atex.Config.OAuth, Atex.OAuth, Atex.OAuth.Plug],
         Lexicons: ~r/^Atex\.Lexicon/,
-        Identity: ~r/^Atex\.IdentityResolver/
+        Identity: [Atex.Config.IdentityResolver, ~r/^Atex\.IdentityResolver/]
       ]
     ]
   end
-- 
2.51.2