# .cqa - ClassQuizArchive A file-format for ClassQuiz-quizzes which stores images and the quiz in one compact file ## How the file format works ``` [QUIZ_DATA] {C7 C7 C7 00} {C6 C6 C6 00} [UTF-8 encoded image-index] {C5 C5 00} [IMAGE as it is] {C6 C6 C6 00} [UTF-8 encoded image-index] {C5 C5 00} [IMAGE as it is] ``` ## Understanding the schema ### in {} - `{C7 C7 C7 00}`: separates the quiz-data from the images - `{C6 C6 C6 00}`: Indicates that a new image-block starts - `{C5 C5 00}`: separates image-index and image ### in [] - `[QUIZ_DATA]`: The **gzipped JSON** of the quiz with some modifications: - Removed `id`-field and `user_id`-field - Dates (`created_at` and `updated_at`) formatted as ISO-Dates - Images replaced with their question-index - Cover-image with index `-1` - `[UTF-8 encoded image-index]`: The index of the question which the image belongs to. - `[IMAGE as it is]`: The unmodified uploaded image (jpg, png, webp, etc.)