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| from flask.templating import DispatchingJinjaLoader |
| from jinja2 import TemplateNotFound |
|
|
|
|
| class VersionedTemplateLoader(DispatchingJinjaLoader): |
| def get_source(self, environment, template): |
| specified_version_number, exists = parse_version(template) |
| if not exists: |
| return super().get_source( |
| environment, template |
| ) |
|
|
| template_dir, file_name = parse_template(template) |
|
|
| for version_mapping in get_version_mapping(template): |
| if version_mapping['number'] > specified_version_number: |
| continue |
|
|
| template_path = '/'.join([ |
| template_dir, |
| version_mapping['name'], |
| file_name |
| ]) |
|
|
| try: |
| return super().get_source( |
| environment, template_path |
| ) |
| except TemplateNotFound: |
| continue |
| raise TemplateNotFound(template) |
|
|
|
|
| def parse_version(template): |
| template_path_parts = template.split("#", 3) |
| if len(template_path_parts) == 1: |
| return "", False |
|
|
| if len(template_path_parts) == 3: |
| _, version, _ = template_path_parts |
| return int(version), True |
|
|
| if len(template_path_parts) == 4: |
| _, _, version, _ = template_path_parts |
| return int(version), True |
|
|
| raise TemplateNotFound(template) |
|
|
|
|
| def parse_template(template): |
| template_path_parts = template.split("#", 3) |
| return template_path_parts[0].strip('\\').strip('/'), \ |
| template_path_parts[-1].strip('\\').strip('/') |
|
|
|
|
| def get_version_mapping(template): |
| template_path_parts = template.split("#", 3) |
|
|
| if len(template_path_parts) == 4: |
| _, _, _, _ = template_path_parts |
|
|
| return get_version_mapping_directories() |
|
|
|
|
| def get_version_mapping_directories(): |
| """ |
| This function will return all the version mapping directories |
| :param server_type: |
| :return: |
| """ |
| return ({'name': "16_plus", 'number': 160000}, |
| {'name': "15_plus", 'number': 150000}, |
| {'name': "14_plus", 'number': 140000}, |
| {'name': "13_plus", 'number': 130000}, |
| {'name': "12_plus", 'number': 120000}, |
| {'name': "11_plus", 'number': 110000}, |
| {'name': "default", 'number': 0}) |
|
|
