119 lines
3.5 KiB
Go
119 lines
3.5 KiB
Go
package analyzer
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"strings"
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"time"
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)
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type DeepSeekAnalyzer struct {
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apiKey string
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baseURL string
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client *http.Client
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}
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func NewDeepSeekAnalyzer(apiKey, baseURL string) *DeepSeekAnalyzer {
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if baseURL == "" {
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baseURL = "https://api.deepseek.com"
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}
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return &DeepSeekAnalyzer{
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apiKey: apiKey,
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baseURL: strings.TrimRight(baseURL, "/"),
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client: &http.Client{Timeout: 30 * time.Second},
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}
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}
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func (d *DeepSeekAnalyzer) AnalyzeJD(ctx context.Context, jobTitle, rawContent string) (*AnalysisOutput, error) {
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prompt := fmt.Sprintf(`You are an expert technical resume screener. Analyze the following job description for the title "%s".
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Provide a structured JSON output with 3 fields:
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- "matched_highlights": list of 3-5 core technical skills/requirements matched (e.g. ["Go (Golang)", "Microservices", "REST APIs"]).
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- "missing_highlights": list of 1-3 missing skills, experience gaps, or extra requirements (e.g. ["10+ yrs experience", "Kubernetes administration"]).
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- "tailoring_suggestions": list of 2-3 specific action points for tailoring a resume to this JD.
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Job Title: %s
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Job Content:
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%s`, jobTitle, jobTitle, rawContent)
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reqBody := map[string]interface{}{
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"model": "deepseek-chat",
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"messages": []map[string]string{
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{"role": "system", "content": "You are a professional hiring assistant. You MUST respond ONLY with valid JSON matching {\"matched_highlights\": [...], \"missing_highlights\": [...], \"tailoring_suggestions\": [...]}."},
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{"role": "user", "content": prompt},
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},
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"response_format": map[string]string{
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"type": "json_object",
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},
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}
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jsonBytes, err := json.Marshal(reqBody)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal DeepSeek payload: %w", err)
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}
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url := fmt.Sprintf("%s/chat/completions", d.baseURL)
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req, err := http.NewRequestWithContext(ctx, "POST", url, bytes.NewBuffer(jsonBytes))
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if err != nil {
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return nil, fmt.Errorf("failed to create DeepSeek request: %w", err)
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", d.apiKey))
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resp, err := d.client.Do(req)
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if err != nil {
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return nil, fmt.Errorf("DeepSeek API call failed: %w", err)
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}
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defer resp.Body.Close()
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respBytes, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read DeepSeek response: %w", err)
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}
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("DeepSeek API error (status %d): %s", resp.StatusCode, string(respBytes))
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}
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var dsResp 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.Unmarshal(respBytes, &dsResp); err != nil {
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return nil, fmt.Errorf("failed to decode DeepSeek envelope: %w", err)
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}
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if len(dsResp.Choices) == 0 {
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return nil, fmt.Errorf("empty choices in DeepSeek response")
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}
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rawJSON := cleanJSONResponse(dsResp.Choices[0].Message.Content)
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var output AnalysisOutput
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if err := json.Unmarshal([]byte(rawJSON), &output); err != nil {
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return nil, fmt.Errorf("failed to parse DeepSeek JSON output: %w", err)
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}
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return &output, nil
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}
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func cleanJSONResponse(raw string) string {
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cleaned := strings.TrimSpace(raw)
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if strings.HasPrefix(cleaned, "```json") {
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cleaned = strings.TrimPrefix(cleaned, "```json")
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cleaned = strings.TrimSuffix(cleaned, "```")
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} else if strings.HasPrefix(cleaned, "```") {
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cleaned = strings.TrimPrefix(cleaned, "```")
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cleaned = strings.TrimSuffix(cleaned, "```")
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}
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return strings.TrimSpace(cleaned)
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}
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