FEATURE: HuggingFace Text Embeddings Inference compatibility (#323)

* FEATURE: HuggingFace Text Embeddings Inference compatibility

* lint

config/settings.yml

@@ -122,6 +122,8 @@ discourse_ai:
     default: 4096
   ai_hugging_face_model_display_name:
     default: ""
+  ai_hugging_face_tei_endpoint:
+    default: ""
   ai_google_custom_search_api_key:
     default: ""
     secret: true

lib/modules/embeddings/vector_representations/bge_large_en.rb

@@ -5,10 +5,23 @@ module DiscourseAi
     module VectorRepresentations
       class BgeLargeEn < Base
         def vector_from(text)
-          DiscourseAi::Inference::CloudflareWorkersAi
-            .perform!(inference_model_name, { text: text })
-            .dig(:result, :data)
-            .first
+          if SiteSetting.ai_cloudflare_workers_api_token.present?
+            DiscourseAi::Inference::CloudflareWorkersAi
+              .perform!(inference_model_name, { text: text })
+              .dig(:result, :data)
+              .first
+          elsif SiteSetting.ai_hugging_face_tei_endpoint.present?
+            DiscourseAi::Inference::HuggingFaceTextEmbeddings.perform!(text).first
+          elsif SiteSetting.ai_embeddings_discourse_service_api_endpoint.present?
+            DiscourseAi::Inference::DiscourseClassifier.perform!(
+              "#{SiteSetting.ai_embeddings_discourse_service_api_endpoint}/api/v1/classify",
+              inference_model_name.split("/").last,
+              text,
+              SiteSetting.ai_embeddings_discourse_service_api_key,
+            )
+          else
+            raise "No inference endpoint configured"
+          end
         end
 
         def name

lib/modules/embeddings/vector_representations/multilingual_e5_large.rb

@@ -5,12 +5,18 @@ module DiscourseAi
     module VectorRepresentations
       class MultilingualE5Large < Base
         def vector_from(text)
-          DiscourseAi::Inference::DiscourseClassifier.perform!(
-            "#{SiteSetting.ai_embeddings_discourse_service_api_endpoint}/api/v1/classify",
-            name,
-            "query: #{text}",
-            SiteSetting.ai_embeddings_discourse_service_api_key,
-          )
+          if SiteSetting.ai_hugging_face_tei_endpoint.present?
+            DiscourseAi::Inference::HuggingFaceTextEmbeddings.perform!(text).first
+          elsif SiteSetting.ai_embeddings_discourse_service_api_endpoint.present?
+            DiscourseAi::Inference::DiscourseClassifier.perform!(
+              "#{SiteSetting.ai_embeddings_discourse_service_api_endpoint}/api/v1/classify",
+              name,
+              "query: #{text}",
+              SiteSetting.ai_embeddings_discourse_service_api_key,
+            )
+          else
+            raise "No inference endpoint configured"
+          end
         end
 
         def id

lib/shared/inference/hugging_face_text_embeddings.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module ::DiscourseAi
+  module Inference
+    class HuggingFaceTextEmbeddings
+      def self.perform!(content)
+        headers = { "Referer" => Discourse.base_url, "Content-Type" => "application/json" }
+        body = { inputs: content }.to_json
+
+        api_endpoint = SiteSetting.ai_hugging_face_tei_endpoint
+
+        response = Faraday.post(api_endpoint, body, headers)
+
+        raise Net::HTTPBadResponse if ![200].include?(response.status)
+
+        JSON.parse(response.body, symbolize_names: true)
+      end
+    end
+  end
+end

plugin.rb

@@ -42,6 +42,7 @@ after_initialize do
   require_relative "lib/shared/inference/hugging_face_text_generation"
   require_relative "lib/shared/inference/amazon_bedrock_inference"
   require_relative "lib/shared/inference/cloudflare_workers_ai"
+  require_relative "lib/shared/inference/hugging_face_text_embeddings"
   require_relative "lib/shared/inference/function"
   require_relative "lib/shared/inference/function_list"