1 files changed, 79 insertions, 0 deletions
diff --git a/internal/fabric/fabric.go b/internal/fabric/fabric.go
new file mode 100644
index 0000000..3e52e6f
--- /dev/null
+++ b/internal/fabric/fabric.go
@@ -0,0 +1,79 @@
+package fabric
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+const (
+	apiBase   = "https://meta.fabricmc.net/v2"
+	userAgent = "benson/2.0 (github.com/hachem-wtf/benson)"
+)
+
+type GameVersion struct {
+	Version string `json:"version"`
+	Stable  bool   `json:"stable"`
+}
+
+type LoaderVersion struct {
+	Version string `json:"version"`
+	Stable  bool   `json:"stable"`
+}
+
+type InstallerVersion struct {
+	Version string `json:"version"`
+	Stable  bool   `json:"stable"`
+}
+
+type Client struct {
+	http *http.Client
+}
+
+func NewClient() *Client {
+	return &Client{http: &http.Client{Timeout: 30 * time.Second}}
+}
+
+func (c *Client) get(path string, out any) error {
+	req, err := http.NewRequest(http.MethodGet, apiBase+path, nil)
+	if err != nil {
+		return err
+	}
+	req.Header.Set("User-Agent", userAgent)
+
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("fabric: %s returned %s", path, resp.Status)
+	}
+	return json.NewDecoder(resp.Body).Decode(out)
+}
+
+func (c *Client) GameVersions() ([]GameVersion, error) {
+	var versions []GameVersion
+	if err := c.get("/versions/game", &versions); err != nil {
+		return nil, err
+	}
+	return versions, nil
+}
+
+func (c *Client) LoaderVersions() ([]LoaderVersion, error) {
+	var versions []LoaderVersion
+	if err := c.get("/versions/loader", &versions); err != nil {
+		return nil, err
+	}
+	return versions, nil
+}
+
+func (c *Client) InstallerVersions() ([]InstallerVersion, error) {
+	var versions []InstallerVersion
+	if err := c.get("/versions/installer", &versions); err != nil {
+		return nil, err
+	}
+	return versions, nil
+}