87 lines
1.8 KiB
Go
87 lines
1.8 KiB
Go
package chatgpt
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import (
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"backend/config"
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"time"
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)
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type ChatRequest struct {
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Model string `json:"model"`
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Messages []ChatMessage `json:"messages"`
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}
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type ChatMessage struct {
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Role string `json:"role"`
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Content string `json:"content"`
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}
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func GenerateCoverLetter(templateHTML string, jobHTML string) (string, error) {
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apiKey := config.Env["CHATGPT_KEY"]
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if apiKey == "" {
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return "", errors.New("no API key chat gpt provided")
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}
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payload := ChatRequest{
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Model: "gpt-4o", // o4-mini
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Messages: []ChatMessage{
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{
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Role: "system",
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Content: `You are a helpful assistant that fills out cover letter templates in HTML format. Replace all <...> tags like <company>, <experience>, etc., with appropriate content based on the job application.`,
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},
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{
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Role: "user",
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Content: fmt.Sprintf(`Template:
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%s
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Job description:
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%s
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Respond with ONLY the filled HTML cover letter.`, templateHTML, jobHTML),
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},
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},
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}
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body, err := json.Marshal(payload)
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if err != nil {
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return "", err
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}
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req, err := http.NewRequest("POST", "https://api.openai.com/v1/chat/completions", bytes.NewBuffer(body))
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if err != nil {
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return "", err
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Authorization", "Bearer "+apiKey)
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client := &http.Client{Timeout: 20 * time.Second}
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res, err := client.Do(req)
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if err != nil {
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return "", err
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}
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defer res.Body.Close()
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var result struct {
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Choices []struct {
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Message struct {
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Content string `json:"content"`
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} `json:"message"`
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} `json:"choices"`
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}
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if err := json.NewDecoder(res.Body).Decode(&result); err != nil {
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return "", err
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}
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if len(result.Choices) == 0 {
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return "", fmt.Errorf("no response from GPT")
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}
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return result.Choices[0].Message.Content, nil
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}
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