added 260907 version of worker toolkit

worker-toolkit-flaredown/repo/backend/lib/discourse_client.rb

@@ -0,0 +1,31 @@
+require "openssl"
+
+class DiscourseClient
+  def initialize(user, params = {})
+    @user = user
+    @params = params
+  end
+
+  def generate_url
+    uri = URI(ENV.fetch("DISCOURSE_AUTH_URL"))
+
+    if OpenSSL::HMAC.hexdigest("sha256", ENV.fetch("DISCOURSE_SECRET"), sso) == sig
+      nonce = Base64.decode64(sso)
+      sso = Base64.encode64(nonce + "&email=" + @user.email + "&external_id=" + @user.external_id)
+      sig = OpenSSL::HMAC.hexdigest("sha256", ENV.fetch("DISCOURSE_SECRET"), sso)
+      uri.query = {sso: sso, sig: sig}.to_query
+    end
+
+    uri.to_s
+  end
+
+  private
+
+  def sig
+    @params.fetch(:sig)
+  end
+
+  def sso
+    @params.fetch(:sso)
+  end
+end