Fix avatars failing to be set on XMPP accounts

There's a stray `end` that prematurely closes the class

spec/services/ejabberd_manager/set_avatar_spec.rb

@@ -0,0 +1,104 @@
+require 'rails_helper'
+require 'webmock/rspec'
+require 'digest'
+
+RSpec.describe EjabberdManager::SetAvatar, type: :model do
+  let(:user)  { create :user, cn: "willherschel", ou: "kosmos.org" }
+  let(:fixture_path) { Rails.root.join("spec/fixtures/files/bender.png") }
+  let(:img_data) do
+    ImageProcessing::Vips
+      .source(File.open(fixture_path))
+      .resize_to_fill(256, 256)
+      .convert("png")
+      .call.read
+  end
+  let(:sha1_hash)   { Digest::SHA1.hexdigest(img_data) }
+  let(:base64_data) { Base64.strict_encode64(img_data) }
+
+  before do
+    ActiveStorage::Blob.create_and_upload!(
+      io: File.open(fixture_path),
+      filename: "bender.png",
+      content_type: "image/png"
+    ).tap { |blob| user.avatar.attach(blob) }
+  end
+
+  def stub_send_stanza_ok
+    stub_request(:post, "http://xmpp.example.com/api/send_stanza")
+      .to_return(status: 200, body: "", headers: {})
+  end
+
+  context "when an avatar is already set and overwrite is false" do
+    before do
+      allow(EjabberdManager::GetAvatar).to receive(:call).with(user: user).and_return({ img_base64: "abc", content_type: "image/png" })
+      stub_send_stanza_ok
+    end
+
+    it "does not send any stanzas" do
+      described_class.call(user: user)
+      expect(WebMock).not_to have_requested(:post, "http://xmpp.example.com/api/send_stanza")
+    end
+  end
+
+  context "when no avatar is set yet" do
+    let(:sent_stanzas) { [] }
+
+    before do
+      allow(EjabberdManager::GetAvatar).to receive(:call).with(user: user).and_return(nil)
+      stub_request(:post, "http://xmpp.example.com/api/send_stanza")
+        .to_return(status: 200, body: "", headers: {})
+    end
+
+    it "publishes the XEP-0084 data and metadata stanzas" do
+      service = described_class.new(user: user)
+      allow(service).to receive(:send_stanza) do |payload|
+        sent_stanzas << payload[:stanza]
+        double(status: 200)
+      end
+
+      service.call
+
+      expect(sent_stanzas.length).to eq(2)
+
+      data_stanza = sent_stanzas.find { |s| s.include?("urn:xmpp:avatar:data") }
+      meta_stanza = sent_stanzas.find { |s| s.include?("urn:xmpp:avatar:metadata") }
+
+      expect(data_stanza).to include("from='willherschel@kosmos.org'")
+      expect(data_stanza).to include("<item id='#{sha1_hash}'>")
+      expect(data_stanza).to include("<data xmlns='urn:xmpp:avatar:data'>#{base64_data}</data>")
+
+      expect(meta_stanza).to include("from='willherschel@kosmos.org'")
+      expect(meta_stanza).to include("<item id='#{sha1_hash}'>")
+      expect(meta_stanza).to include("bytes='#{img_data.size}'")
+      expect(meta_stanza).to include("id='#{sha1_hash}'")
+      expect(meta_stanza).to include("type='image/png'")
+      expect(meta_stanza).to include("height='256'")
+      expect(meta_stanza).to include("width='256'")
+    end
+  end
+
+  context "when overwrite is true" do
+    before do
+      allow(EjabberdManager::GetAvatar).to receive(:call).and_return({ img_base64: "abc", content_type: "image/png" })
+      stub_send_stanza_ok
+    end
+
+    it "does not check for an existing avatar and sends stanzas" do
+      described_class.call(user: user, overwrite: true)
+      expect(EjabberdManager::GetAvatar).not_to have_received(:call)
+      expect(WebMock).to have_requested(:post, "http://xmpp.example.com/api/send_stanza").twice
+    end
+  end
+
+  context "when the ejabberd API returns a non-200 status" do
+    before do
+      allow(EjabberdManager::GetAvatar).to receive(:call).with(user: user).and_return(nil)
+      stub_request(:post, "http://xmpp.example.com/api/send_stanza")
+        .to_return(status: 500, body: "error", headers: {})
+    end
+
+    it "raises" do
+      expect { described_class.call(user: user) }.to raise_error(RuntimeError)
+    end
+  end
+end