Merge pull request #176 from StillGreen-san/onedrive-improvements

onedrive improvements

Author: lrmtheboss

DriveBackup/src/main/java/ratismal/drivebackup/uploaders/onedrive/GraphApiErrorException.java

@@ -0,0 +1,114 @@
+package ratismal.drivebackup.uploaders.onedrive;
+
+import okhttp3.Response;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.json.JSONException;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * an exception representing a microsoft graph api error
+ */
+public class GraphApiErrorException extends Exception {
+    private static final String ERROR_OBJ_KEY = "error";
+    private static final String CODE_STR_KEY = "code";
+    private static final String INNERERROR_OBJ_KEY = "innererror";
+    private static final String MESSAGE_STR_KEY = "message";
+    private static final String DETAILS_ARR_KEY = "details";
+
+    /** status code of the response or -1 if not available */
+    public final int statusCode;
+    /** an error code string for the error that occurred */
+    public final String errorCode;
+    /** a developer ready message about the error that occurred. this shouldn't be displayed to the user directly */
+    public final String errorMessage;
+    /** optional list of additional error objects that might be more specific than the top-level error */
+    public final List<String> innerErrors;
+    /**
+     * optional list of additional error objects that might provide a breakdown of multiple errors encountered
+     * while processing the request
+     */
+    public final List<GraphApiErrorException> details;
+
+    /**
+     * create the exception from a response
+     *
+     * @param response to parse error from its body
+     * @throws IOException          if the body string could not be loaded
+     * @throws NullPointerException if the body could not be loaded
+     * @throws JSONException        if the body does not contain the expected json values
+     */
+    public GraphApiErrorException(@NotNull Response response) throws IOException {
+        this(response.code(), new JSONObject(response.body().string()).getJSONObject(ERROR_OBJ_KEY));
+    }
+
+    /**
+     * create the exception from a status code and response body
+     *
+     * @param statusCode of the response
+     * @param responseBody of the response
+     * @throws JSONException if the body does not contain the expected json values
+     */
+    public GraphApiErrorException(int statusCode, @NotNull String responseBody) {
+        this(statusCode, new JSONObject(responseBody).getJSONObject(ERROR_OBJ_KEY));
+    }
+
+    private static List<String> parseInnerErrors(@Nullable JSONObject innerErrors) {
+        List<String> list = new ArrayList<>();
+        while (innerErrors != null) {
+            String errorCode = innerErrors.optString(CODE_STR_KEY);
+            if (errorCode != null) {
+                list.add(errorCode);
+            }
+            innerErrors = innerErrors.optJSONObject(INNERERROR_OBJ_KEY);
+        }
+        return list;
+    }
+
+    private static List<GraphApiErrorException> parseDetails(@Nullable JSONArray details) {
+        if (details == null) {
+            return new ArrayList<>();
+        }
+        List<GraphApiErrorException> list = new ArrayList<>(details.length());
+        for (int detailIdx = 0; detailIdx < details.length(); detailIdx++) {
+            list.add(new GraphApiErrorException(-1, details.getJSONObject(detailIdx).getJSONObject(ERROR_OBJ_KEY)));
+        }
+        return list;
+    }
+
+    private GraphApiErrorException(int statusCode, @NotNull JSONObject error) {
+        this(statusCode, error.getString(CODE_STR_KEY), error.getString(MESSAGE_STR_KEY),
+            parseInnerErrors(error.optJSONObject(INNERERROR_OBJ_KEY)),
+            parseDetails(error.optJSONArray(DETAILS_ARR_KEY)));
+    }
+
+    private static String toMessage(int statusCode, String errorCode, String errorMessage, List<String> innerErrors,
+        List<GraphApiErrorException> details) {
+        String format = "%d %s : \"%s\"%s%s";
+        String inner = String.join("\", \"", innerErrors);
+        String detail = details.stream().map(GraphApiErrorException::getMessage).collect(Collectors.joining(" }, { "));
+        if (!inner.isEmpty()) {
+            inner = " inner:[ \"" + inner + "\" ]";
+        }
+        if (!detail.isEmpty()) {
+            detail = " details:[ { " + detail + " } ]";
+        }
+        return String.format(format, statusCode, errorCode, errorMessage, inner, detail);
+    }
+
+    private GraphApiErrorException(int statusCode, String errorCode, String errorMessage, List<String> innerErrors,
+        List<GraphApiErrorException> details) {
+        super(toMessage(statusCode, errorCode, errorMessage, innerErrors, details));
+        this.statusCode = statusCode;
+        this.errorCode = errorCode;
+        this.errorMessage = errorMessage;
+        this.innerErrors = innerErrors;
+        this.details = details;
+    }
+}