feat: basic auth shit + db init

internal/auth/client/client.go

@@ -0,0 +1,116 @@
+package client
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"stereo.cat/backend/internal/auth"
+)
+
+type Client struct {
+	RedirectUri  string
+	ClientSecret string
+	ClientId     string
+}
+
+const api = "https://discord.com/api/v10"
+
+func New(redirectUri, clientId, clientSecret string) Client {
+	return Client{
+		RedirectUri:  redirectUri,
+		ClientId:     clientId,
+		ClientSecret: clientSecret,
+	}
+}
+
+func (c Client) GetUser(t auth.TokenResponse) (auth.User, error) {
+    user := auth.User {
+        Blacklisted: false,
+    }
+
+	req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("%s/%s", api, "users/@me"), nil)
+
+	if err != nil {
+		return user, nil
+	}
+
+	req.Header.Add("Content-Type", "application/json")
+	req.Header.Add("Authorization", "Bearer "+t.AccessToken)
+
+	resp, err := http.DefaultClient.Do(req)
+
+	if resp.StatusCode != http.StatusOK {
+		bodyBytes, err := io.ReadAll(resp.Body)
+
+		if err != nil {
+			return user, err
+		}
+
+		return user, errors.New(string(bodyBytes))
+	}
+
+	if err != nil {
+		return user, err
+	}
+
+	defer resp.Body.Close()
+
+	err = json.NewDecoder(resp.Body).Decode(&user)
+
+	if err != nil {
+		return user, err
+	}
+
+	return user, nil
+}
+
+func (c Client) ExchangeCode(code string) (auth.TokenResponse, error) {
+	var tokenResponse auth.TokenResponse
+
+	requestBody := url.Values{
+		"grant_type":   {"authorization_code"},
+		"code":         {code},
+		"redirect_uri": {c.RedirectUri},
+	}
+
+	req, err := http.NewRequest(http.MethodPost, fmt.Sprintf("%s/%s", api, "/oauth2/token"), strings.NewReader(requestBody.Encode()))
+
+	if err != nil {
+		return tokenResponse, err
+	}
+
+	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
+	req.SetBasicAuth(c.ClientId, c.ClientSecret)
+
+	resp, err := http.DefaultClient.Do(req)
+
+	if resp.StatusCode != http.StatusOK {
+		bodyBytes, err := io.ReadAll(resp.Body)
+
+		if err != nil {
+			return tokenResponse, err
+		}
+
+		return tokenResponse, errors.New(string(bodyBytes))
+	}
+
+	if err != nil {
+		return tokenResponse, err
+	}
+
+	defer resp.Body.Close()
+
+	err = json.NewDecoder(resp.Body).Decode(&tokenResponse)
+
+	if err != nil {
+		return tokenResponse, err
+	}
+
+	return tokenResponse, nil
+}