Add mistral API

llm/mistral.go

@@ -0,0 +1,159 @@
+package llm
+
+import (
+	"bytes"
+	"encoding/json"
+	"ersteller-lib"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+type ChatCompletionRequestResponseFormatType string
+
+const (
+	ChatCompletionRequestResponseFormatText ChatCompletionRequestResponseFormatType = "text"
+	ChatCompletionRequestResponseFormatJSON ChatCompletionRequestResponseFormatType = "json_object"
+)
+
+type ChatCompletionRequestResponseFormat struct {
+	Type ChatCompletionRequestResponseFormatType `json:"type,omitempty"`
+}
+
+// ChatCompletionRequest represents the request body for chat completions
+type ChatCompletionRequest struct {
+	Model            string                              `json:"model"`
+	Messages         []Message                           `json:"messages"`
+	Temperature      *float64                            `json:"temperature,omitempty"`
+	TopP             *float64                            `json:"top_p,omitempty"`
+	MaxTokens        *int                                `json:"max_tokens,omitempty"`
+	Stream           bool                                `json:"stream"`
+	Stop             interface{}                         `json:"stop,omitempty"`
+	RandomSeed       *int                                `json:"random_seed,omitempty"`
+	Tools            []Tool                              `json:"tools,omitempty"`
+	ToolChoice       interface{}                         `json:"tool_choice,omitempty"`
+	PresencePenalty  float64                             `json:"presence_penalty,omitempty"`
+	FrequencyPenalty float64                             `json:"frequency_penalty,omitempty"`
+	N                *int                                `json:"n,omitempty"`
+	SafePrompt       bool                                `json:"safe_prompt"`
+	ResponseFormat   ChatCompletionRequestResponseFormat `json:"response_format,omitempty"`
+}
+
+// Message represents a chat message
+type Message struct {
+	Role    string `json:"role"`
+	Content string `json:"content"`
+}
+
+// Tool represents a function tool
+type Tool struct {
+	Type     string   `json:"type"`
+	Function Function `json:"function"`
+}
+
+// Function represents a function definition
+type Function struct {
+	Name        string                 `json:"name"`
+	Description string                 `json:"description,omitempty"`
+	Parameters  map[string]interface{} `json:"parameters"`
+	Strict      bool                   `json:"strict,omitempty"`
+}
+
+// ChatCompletionResponse represents the API response
+type ChatCompletionResponse struct {
+	ID      string                 `json:"id"`
+	Object  string                 `json:"object"`
+	Created int64                  `json:"created"`
+	Model   string                 `json:"model"`
+	Choices []ChatCompletionChoice `json:"choices"`
+	Usage   UsageInfo              `json:"usage"`
+}
+
+// ChatCompletionChoice represents a completion choice
+type ChatCompletionChoice struct {
+	Index        int     `json:"index"`
+	Message      Message `json:"message"`
+	FinishReason string  `json:"finish_reason"`
+}
+
+// UsageInfo represents token usage information
+type UsageInfo struct {
+	PromptTokens     int `json:"prompt_tokens"`
+	CompletionTokens int `json:"completion_tokens"`
+	TotalTokens      int `json:"total_tokens"`
+}
+
+// Client represents a Mistral API client
+type MistralClientImpl struct {
+	APIKey     string
+	BaseURL    string
+	HTTPClient *http.Client
+}
+
+// NewClient creates a new Mistral API client
+func NewMistralClient(apiKey string) *MistralClientImpl {
+	return &MistralClientImpl{
+		APIKey:     apiKey,
+		BaseURL:    "https://api.mistral.ai",
+		HTTPClient: &http.Client{},
+	}
+}
+
+// CreateChatCompletion sends a chat completion request to the API
+func (c *MistralClientImpl) CreateChatCompletion(req *ChatCompletionRequest) (*ChatCompletionResponse, error) {
+	jsonData, err := json.Marshal(req)
+	if err != nil {
+		return nil, fmt.Errorf("error marshaling request: %v", err)
+	}
+
+	request, err := http.NewRequest("POST", c.BaseURL+"/v1/chat/completions", bytes.NewBuffer(jsonData))
+	if err != nil {
+		return nil, fmt.Errorf("error creating request: %v", err)
+	}
+
+	request.Header.Set("Content-Type", "application/json")
+	request.Header.Set("Authorization", "Bearer "+c.APIKey)
+
+	response, err := c.HTTPClient.Do(request)
+	if err != nil {
+		return nil, fmt.Errorf("error making request: %v", err)
+	}
+	defer response.Body.Close()
+
+	body, err := io.ReadAll(response.Body)
+	if err != nil {
+		return nil, fmt.Errorf("error reading response body: %v", err)
+	}
+
+	if response.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("API request failed with status %d: %s", response.StatusCode, string(body))
+	}
+
+	var result ChatCompletionResponse
+	if err := json.Unmarshal(body, &result); err != nil {
+		return nil, fmt.Errorf("error unmarshaling response: %v", err)
+	}
+
+	return &result, nil
+}
+
+type MistralClient interface {
+	CreateChatCompletion(req *ChatCompletionRequest) (*ChatCompletionResponse, error)
+}
+
+type MistralClientMock struct{}
+
+func (m MistralClientMock) CreateChatCompletion(req *ChatCompletionRequest) (*ChatCompletionResponse, error) {
+	ersteller_lib.Debug("mocking the mistral client")
+	response := ChatCompletionResponse{
+		Choices: []ChatCompletionChoice{
+			{
+				Message: Message{
+					Content: `{"name":"Meetup app","description":"An app to make notes for meetups","entities":[{"name":"Meetup","fields":[{"name":"name","type":"string"},{"name":"description","type":"string","longText":true},{"name":"date","type":"time"}],"entities":[{"name":"Notes","fields":[{"name":"title","type":"string"},{"name":"description","type":"string","longText":true}]}]}]}`,
+				},
+			},
+		},
+	}
+	return &response, nil
+	//return nil, errors.New("something went wrong")
+}