feat: implement workflow list/view/run

internal/api/client.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -85,6 +86,57 @@ func (c *Client) GetJSON(path string, result any) error {
 	return nil
 }
 
+// PostJSON performs a POST request to the specified path with JSON body
+func (c *Client) PostJSON(path string, body any, result any) error {
+	baseURL := "https://" + c.hostname
+	url := baseURL + path
+
+	var bodyReader io.Reader
+	if body != nil {
+		bodyBytes, err := json.Marshal(body)
+		if err != nil {
+			return fmt.Errorf("failed to marshal request body: %w", err)
+		}
+		bodyReader = bytes.NewReader(bodyBytes)
+	}
+
+	req, err := http.NewRequest(http.MethodPost, url, bodyReader)
+	if err != nil {
+		return fmt.Errorf("failed to create request: %w", err)
+	}
+
+	// Set authentication header
+	if c.token != "" {
+		req.Header.Set("Authorization", "token "+c.token)
+	}
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("Content-Type", "application/json")
+
+	httpClient := &http.Client{}
+	resp, err := httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to perform request: %w", err)
+	}
+	defer func() {
+		if closeErr := resp.Body.Close(); closeErr != nil && err == nil {
+			err = fmt.Errorf("failed to close response body: %w", closeErr)
+		}
+	}()
+
+	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusCreated && resp.StatusCode != http.StatusNoContent {
+		bodyBytes, _ := io.ReadAll(resp.Body)
+		return fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(bodyBytes))
+	}
+
+	if result != nil && resp.StatusCode != http.StatusNoContent {
+		if err := json.NewDecoder(resp.Body).Decode(result); err != nil {
+			return fmt.Errorf("failed to decode response: %w", err)
+		}
+	}
+
+	return nil
+}
+
 // GetRawLog performs a GET request and returns the raw response body as string
 func (c *Client) GetRawLog(url string) (string, error) {
 	req, err := http.NewRequest(http.MethodGet, url, nil)