Go: implement provider: MiniMax (#14478)

### What problem does this PR solve?

implement MiniMax provider

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)

conf/models/minimax.json

@@ -6,6 +6,7 @@
   },
   "url_suffix": {
     "chat": "v1/text/chatcompletion_v2",
+    "models": "v1/models",
     "tts": "v1/t2a_v2",
     "files": "v1/files/list"
   },
@@ -16,56 +17,88 @@
       "max_tokens": 204800,
       "model_types": [
         "chat"
-      ]
+      ],
+      "thinking": {
+        "default_value": true,
+        "clear_thinking": true
+      }
     },
     {
       "name": "minimax-m2.7-highspeed",
       "max_tokens": 204800,
       "model_types": [
         "chat"
-      ]
+      ],
+      "thinking": {
+        "default_value": true,
+        "clear_thinking": true
+      }
     },
     {
       "name": "minimax-m2.5",
       "max_tokens": 204800,
       "model_types": [
         "chat"
-      ]
+      ],
+      "thinking": {
+        "default_value": true,
+        "clear_thinking": true
+      }
     },
     {
       "name": "minimax-m2.5-highspeed",
       "max_tokens": 204800,
       "model_types": [
         "chat"
-      ]
+      ],
+      "thinking": {
+        "default_value": true,
+        "clear_thinking": true
+      }
     },
     {
       "name": "minimax-m2.1",
       "max_tokens": 204800,
       "model_types": [
         "chat"
-      ]
+      ],
+      "thinking": {
+        "default_value": true,
+        "clear_thinking": true
+      }
     },
     {
       "name": "minimax-m2.1-highspeed",
       "max_tokens": 204800,
       "model_types": [
         "chat"
-      ]
+      ],
+      "thinking": {
+        "default_value": true,
+        "clear_thinking": true
+      }
     },
     {
       "name": "minimax-m2",
       "max_tokens": 204800,
       "model_types": [
         "chat"
-      ]
+      ],
+      "thinking": {
+        "default_value": true,
+        "clear_thinking": true
+      }
     },
     {
       "name": "minimax-m2-her",
       "max_tokens": 65536,
       "model_types": [
         "chat"
-      ]
+      ],
+      "thinking": {
+        "default_value": true,
+        "clear_thinking": true
+      }
     }
   ]
 }

internal/entity/models/minimax.go

@@ -17,9 +17,14 @@
 package models
 
 import (
+	"bufio"
+	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
+	"ragflow/internal/logger"
+	"strings"
 	"time"
 )
 
@@ -57,7 +62,120 @@ func (z *MinimaxModel) Name() string {
 
 // Chat sends a message and returns response
 func (z *MinimaxModel) Chat(modelName, message *string, apiConfig *APIConfig, modelConfig *ChatConfig) (*ChatResponse, error) {
-	return nil, fmt.Errorf("%s, no such method", z.Name())
+	var region = "default"
+
+	if *apiConfig.Region != "" {
+		region = *apiConfig.Region
+	}
+
+	url := fmt.Sprintf("%s/%s", z.BaseURL[region], z.URLSuffix.Chat)
+
+	// Build request Body
+	reqBody := map[string]interface{}{
+		"model": modelName,
+		"messages": []map[string]interface{}{
+			{"role": "user", "content": *message},
+		},
+		"stream":      false,
+		"temperature": 1,
+	}
+
+	if modelConfig.Temperature != nil {
+		reqBody["temperature"] = *modelConfig.Temperature
+	}
+
+	if modelConfig.MaxTokens != nil {
+		reqBody["max_tokens"] = *modelConfig.MaxTokens
+	}
+
+	if modelConfig.Stream != nil {
+		reqBody["stream"] = *modelConfig.Stream
+	}
+
+	if modelConfig.TopP != nil {
+		reqBody["top_p"] = *modelConfig.TopP
+	}
+
+	if modelConfig.DoSample != nil {
+		reqBody["do_sample"] = *modelConfig.DoSample
+	}
+
+	if modelConfig.Thinking != nil {
+		reqBody["thinking"] = *modelConfig.Thinking
+	}
+
+	jsonData, err := json.Marshal(reqBody)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal request: %w", err)
+	}
+
+	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Add("Content-Type", "application/json")
+	req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", *apiConfig.ApiKey))
+
+	resp, err := z.httpClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("failed to send request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response body: %w", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("failed to send request: %d %s", resp.StatusCode, string(body))
+	}
+
+	// Parse response
+	var result map[string]interface{}
+	if err := json.Unmarshal(body, &result); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal response: %w", err)
+	}
+
+	choices, ok := result["choices"].([]interface{})
+	if !ok {
+		return nil, fmt.Errorf("no choices in response")
+	}
+
+	firstChoice, ok := choices[0].(map[string]interface{})
+	if !ok {
+		return nil, fmt.Errorf("no choices in response")
+	}
+
+	messageMap, ok := firstChoice["message"].(map[string]interface{})
+	if !ok {
+		return nil, fmt.Errorf("no message in response")
+	}
+
+	content, ok := messageMap["content"].(string)
+	if !ok {
+		return nil, fmt.Errorf("no message in response")
+	}
+
+	var reasonContent string
+	if modelConfig.Thinking != nil && *modelConfig.Thinking {
+		reasonContent, ok = messageMap["reasoning_content"].(string)
+		if !ok {
+			return nil, fmt.Errorf("invalid content format")
+		}
+		// if first char of reasonContent is \n remove the \n
+		if reasonContent != "" && reasonContent[0] == '\n' {
+			reasonContent = reasonContent[1:]
+		}
+	}
+
+	chatResponse := &ChatResponse{
+		Answer:        &content,
+		ReasonContent: &reasonContent,
+	}
+
+	return chatResponse, nil
 }
 
 // ChatWithMessages sends multiple messages with roles and returns response
@@ -67,7 +185,143 @@ func (z *MinimaxModel) ChatWithMessages(modelName string, apiKey *string, messag
 
 // ChatStreamlyWithSender sends a message and streams response via sender function (best performance, no channel)
 func (z *MinimaxModel) ChatStreamlyWithSender(modelName, message *string, apiConfig *APIConfig, modelConfig *ChatConfig, sender func(*string, *string) error) error {
-	return fmt.Errorf("%s, no such method", z.Name())
+	var region = "default"
+
+	if apiConfig.Region != nil {
+		region = *apiConfig.Region
+	}
+
+	url := fmt.Sprintf("%s/%s", z.BaseURL[region], z.URLSuffix.Chat)
+
+	// Build request body with streaming enabled
+	reqBody := map[string]interface{}{
+		"model": modelName,
+		"messages": []map[string]interface{}{
+			{"role": "user", "content": *message},
+		},
+		"stream":      true,
+		"temperature": 1,
+	}
+
+	if modelConfig.Stream != nil {
+		reqBody["stream"] = *modelConfig.Stream
+	}
+
+	if modelConfig.MaxTokens != nil {
+		reqBody["max_tokens"] = *modelConfig.MaxTokens
+	}
+
+	if modelConfig.Temperature != nil {
+		reqBody["temperature"] = *modelConfig.Temperature
+	}
+
+	if modelConfig.TopP != nil {
+		reqBody["top_p"] = *modelConfig.TopP
+	}
+
+	if modelConfig.DoSample != nil {
+		reqBody["do_sample"] = *modelConfig.DoSample
+	}
+
+	if modelConfig.Stop != nil {
+		reqBody["stop"] = *modelConfig.Stop
+	}
+
+	if modelConfig.Thinking != nil {
+		reqBody["thinking"] = *modelConfig.Thinking
+	}
+
+	jsonData, err := json.Marshal(reqBody)
+	if err != nil {
+		return fmt.Errorf("failed to marshal request: %w", err)
+	}
+
+	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
+	if err != nil {
+		return fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", *apiConfig.ApiKey))
+
+	resp, err := z.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to send request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(resp.Body)
+		return fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(body))
+	}
+
+	// SSE parsing: read line by line
+	scanner := bufio.NewScanner(resp.Body)
+	for scanner.Scan() {
+		line := scanner.Text()
+		logger.Info(line)
+
+		// SSE data line start with data:
+		if !strings.HasPrefix(line, "data:") {
+			continue
+		}
+
+		// Extract JSON after data:
+		data := strings.TrimSpace(line[5:])
+
+		// [DONE] marks the end of stream
+		if data == "[DONE]" {
+			break
+		}
+
+		// Parse the JSON event
+		var event map[string]interface{}
+		if err := json.Unmarshal([]byte(data), &event); err != nil {
+			continue
+		}
+
+		choices, ok := event["choices"].([]interface{})
+		if !ok || len(choices) == 0 {
+			continue
+		}
+
+		firstChoice, ok := choices[0].(map[string]interface{})
+		if !ok {
+			continue
+		}
+
+		delta, ok := firstChoice["delta"].(map[string]interface{})
+		if !ok {
+			continue
+		}
+
+		content, ok := delta["content"].(string)
+		if ok && content != "" {
+			if err := sender(&content, nil); err != nil {
+				return err
+			}
+		}
+
+		reasoningContent, ok := delta["reasoning_content"].(string)
+		if ok && reasoningContent != "" {
+			if err := sender(nil, &reasoningContent); err != nil {
+				return err
+			}
+		}
+
+		finishReason, ok := firstChoice["finish_reason"].(string)
+		if ok && finishReason != "" {
+			break
+		}
+	}
+
+	// Send [DONE] marker for OpenAI compatibility
+	endOfStream := "[DONE]"
+	if err = sender(&endOfStream, nil); err != nil {
+		return err
+	}
+
+	return scanner.Err()
 }
 
 // Encode encodes a list of texts into embeddings
@@ -76,7 +330,59 @@ func (z *MinimaxModel) Encode(modelName *string, texts []string, apiConfig *APIC
 }
 
 func (z *MinimaxModel) ListModels(apiConfig *APIConfig) ([]string, error) {
-	return nil, fmt.Errorf("%s, no such method", z.Name())
+	var region = "default"
+	if apiConfig.Region != nil {
+		region = *apiConfig.Region
+	}
+
+	url := fmt.Sprintf("%s/%s", z.BaseURL[region], z.URLSuffix.Models)
+
+	// Build request body
+	reqBody := map[string]interface{}{}
+
+	jsonData, err := json.Marshal(reqBody)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal request: %w", err)
+	}
+
+	req, err := http.NewRequest("GET", url, bytes.NewBuffer(jsonData))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", *apiConfig.ApiKey))
+
+	resp, err := z.httpClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("failed to send request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response: %w", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("API requestssss failed with status %d: %s : %s", resp.StatusCode, string(body), url)
+	}
+
+	// Parse response
+	var result map[string]interface{}
+	if err = json.Unmarshal(body, &result); err != nil {
+		return nil, fmt.Errorf("failed to parse response: %w", err)
+	}
+
+	// convert result["data"] to []map[string]interface{}
+	models := make([]string, 0)
+	for _, model := range result["data"].([]interface{}) {
+		modelMap := model.(map[string]interface{})
+		modelName := modelMap["id"].(string)
+		models = append(models, modelName)
+	}
+
+	return models, nil
 }
 
 func (z *MinimaxModel) Balance(apiConfig *APIConfig) (map[string]interface{}, error) {

internal/entity/models/volcengine.go

@@ -362,7 +362,7 @@ func (z *VolcEngine) ChatStreamlyWithSender(modelName, message *string, apiConfi
 		}
 
 		content, ok := delta["content"].(string)
-		if ok || content != "" {
+		if ok && content != "" {
 			if err := sender(&content, nil); err != nil {
 				return err
 			}