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package malsync
import (
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"time"
)
const (
malsyncAPIBaseURL = "https://api.malsync.moe/mal"
)
// MALSyncClient provides methods for interacting with the MALSync API
type MALSyncClient struct {
client *http.Client
maxRetries int
}
// NewMALSyncClient creates a new client for the MALSync API
func NewMALSyncClient() *MALSyncClient {
return &MALSyncClient{
client: &http.Client{
Timeout: 8 * time.Second, // Shorter timeout since this is a less critical API
},
maxRetries: 2,
}
}
// GetAnimeByMALID fetches anime metadata from MALSync by MAL ID
func (c *MALSyncClient) GetAnimeByMALID(malID int) (*MALSyncAnimeResponse, error) {
apiURL := fmt.Sprintf("%s/anime/%d", malsyncAPIBaseURL, malID)
// Create context with timeout
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
// Create request
req, err := http.NewRequestWithContext(ctx, "GET", apiURL, nil)
if err != nil {
return nil, fmt.Errorf("failed to create request: %w", err)
}
req.Header.Set("Accept", "application/json")
// Execute request with retries
var resp *http.Response
var lastErr error
success := false
for i := 0; i <= c.maxRetries && !success; i++ {
resp, err = c.client.Do(req)
if err != nil {
lastErr = err
time.Sleep(time.Duration((i+1)*300) * time.Millisecond) // Short backoff on error
continue
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusNotFound {
return nil, nil // Not found is not an error, just return nil
}
if resp.StatusCode != http.StatusOK {
bodyBytes, _ := io.ReadAll(io.LimitReader(resp.Body, 1024))
lastErr = fmt.Errorf("request failed with status %d: %s", resp.StatusCode, string(bodyBytes))
time.Sleep(time.Duration((i+1)*300) * time.Millisecond)
continue
}
success = true
}
if !success {
return nil, fmt.Errorf("failed after %d retries: %w", c.maxRetries, lastErr)
}
// Parse response
bodyBytes, err := io.ReadAll(io.LimitReader(resp.Body, 1024*1024)) // 1MB limit
if err != nil {
return nil, fmt.Errorf("failed to read response: %w", err)
}
var malSyncResponse MALSyncAnimeResponse
if err := json.Unmarshal(bodyBytes, &malSyncResponse); err != nil {
return nil, fmt.Errorf("failed to decode response: %w", err)
}
// Simple validation
if malSyncResponse.ID == 0 {
return nil, fmt.Errorf("received empty response for MAL ID %d", malID)
}
return &malSyncResponse, nil
}
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