Item price support

scripts/rsw/internal/prices/client.go

@@ -96,31 +96,40 @@ type VolumeEntry struct {
 }
 
 // TimeseriesResponse wraps the 5m/1h API responses.
+// The API returns data as a map keyed by item ID string.
 type TimeseriesResponse struct {
-	Data []VolumeEntry `json:"data"`
+	Data map[string]VolumeEntry `json:"data"`
 }
 
 // Get5Min fetches 5-minute average data for an item.
-func (c *Client) Get5Min(itemID int) (*TimeseriesResponse, error) {
+func (c *Client) Get5Min(itemID int) (*VolumeEntry, error) {
 	url := fmt.Sprintf("%s/5m?id=%d", c.baseURL, itemID)
 	var resp TimeseriesResponse
 	if err := c.getJSON(url, &resp); err != nil {
 		return nil, err
 	}
-	return &resp, nil
+	idStr := fmt.Sprintf("%d", itemID)
+	if entry, ok := resp.Data[idStr]; ok {
+		return &entry, nil
+	}
+	return nil, fmt.Errorf("no 5m data for item %d", itemID)
 }
 
 // Get1Hour fetches 1-hour average data for an item.
-func (c *Client) Get1Hour(itemID int) (*TimeseriesResponse, error) {
+func (c *Client) Get1Hour(itemID int) (*VolumeEntry, error) {
 	url := fmt.Sprintf("%s/1h?id=%d", c.baseURL, itemID)
 	var resp TimeseriesResponse
 	if err := c.getJSON(url, &resp); err != nil {
 		return nil, err
 	}
-	return &resp, nil
+	idStr := fmt.Sprintf("%d", itemID)
+	if entry, ok := resp.Data[idStr]; ok {
+		return &entry, nil
+	}
+	return nil, fmt.Errorf("no 1h data for item %d", itemID)
 }
 
-func (c *Client) getJSON(url string, dest interface{}) error {
+func (c *Client) getJSON(url string, dest any) error {
 	req, err := http.NewRequest("GET", url, nil)
 	if err != nil {
 		return fmt.Errorf("creating request: %w", err)
@@ -131,7 +140,7 @@ func (c *Client) getJSON(url string, dest interface{}) error {
 	if err != nil {
 		return fmt.Errorf("executing request: %w", err)
 	}
-	defer resp.Body.Close()
+	defer func() { _ = resp.Body.Close() }()
 
 	if resp.StatusCode != http.StatusOK {
 		body, _ := io.ReadAll(resp.Body)