More Provider refactoring & cleanup

src/main/java/stirling/software/SPDF/model/provider/GitHubProvider.java

@@ -0,0 +1,81 @@
+package stirling.software.SPDF.model.provider;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor
+public class GitHubProvider extends Provider {
+
+    private static final String NAME = "github";
+    private static final String CLIENT_NAME = "GitHub";
+    private static final String AUTHORIZATION_URI = "https://github.com/login/oauth/authorize";
+    private static final String TOKEN_URI = "https://github.com/login/oauth/access_token";
+    private static final String USER_INFO_URI = "https://api.github.com/user";
+
+    public GitHubProvider(
+            String clientId, String clientSecret, Collection<String> scopes, String useAsUsername) {
+        super(
+                null,
+                NAME,
+                CLIENT_NAME,
+                clientId,
+                clientSecret,
+                scopes,
+                useAsUsername != null ? useAsUsername : "login",
+                AUTHORIZATION_URI,
+                TOKEN_URI,
+                USER_INFO_URI);
+    }
+
+    @Override
+    public String getAuthorizationUri() {
+        return AUTHORIZATION_URI;
+    }
+
+    @Override
+    public String getTokenUri() {
+        return TOKEN_URI;
+    }
+
+    @Override
+    public String getUserInfoUri() {
+        return USER_INFO_URI;
+    }
+
+    @Override
+    public String getName() {
+        return NAME;
+    }
+
+    @Override
+    public String getClientName() {
+        return CLIENT_NAME;
+    }
+
+    @Override
+    public Collection<String> getScopes() {
+        Collection<String> scopes = super.getScopes();
+
+        if (scopes == null || scopes.isEmpty()) {
+            scopes = new ArrayList<>();
+            scopes.add("read:user");
+        }
+
+        return scopes;
+    }
+
+    @Override
+    public String toString() {
+        return "GitHub [clientId="
+                + getClientId()
+                + ", clientSecret="
+                + (getClientSecret() != null && !getClientSecret().isEmpty() ? "*****" : "NULL")
+                + ", scopes="
+                + getScopes()
+                + ", useAsUsername="
+                + getUseAsUsername()
+                + "]";
+    }
+}