| {%- macro render_content(content, is_system_content=false) %} |
| {%- if content is string %} |
| {{- content }} |
| {%- elif content is iterable and content is not mapping %} |
| {%- for item in content %} |
| {%- if 'image' in item or 'image_url' in item or item.type == 'image' %} |
| {%- if is_system_content %} |
| {{- raise_exception('System message cannot contain images.') }} |
| {%- endif %} |
| {{- '<|vision_start|><|image_pad|><|vision_end|>' }} |
| {%- elif 'video' in item or item.type == 'video' %} |
| {%- if is_system_content %} |
| {{- raise_exception('System message cannot contain videos.') }} |
| {%- endif %} |
| {{- '<|vision_start|><|video_pad|><|vision_end|>' }} |
| {%- elif 'text' in item %} |
| {{- item.text }} |
| {%- else %} |
| {{- raise_exception('Unexpected item type in content.') }} |
| {%- endif %} |
| {%- endfor %} |
| {%- elif content is none or content is undefined %} |
| {{- '' }} |
| {%- else %} |
| {{- raise_exception('Unexpected content type.') }} |
| {%- endif %} |
| {%- endmacro %} |
| {%- if not messages %} |
| {{- raise_exception('No messages provided.') }} |
| {%- endif %} |
| {%- if tools %} |
| {{- raise_exception('This chat template does not support tools.') }} |
| {%- endif %} |
| {%- for message in messages %} |
| {%- if message.role == 'system' %} |
| {%- if not loop.first %} |
| {{- raise_exception('System message must be first.') }} |
| {%- endif %} |
| {{- '<|im_start|>system\n' + render_content(message.content, true) + '<|im_end|>\n' }} |
| {%- elif message.role == 'user' or message.role == 'assistant' %} |
| {{- '<|im_start|>' + message.role + '\n' + render_content(message.content) + '<|im_end|>\n' }} |
| {%- else %} |
| {{- raise_exception('Only system/user/assistant roles are supported.') }} |
| {%- endif %} |
| {%- endfor %} |
| {%- if add_generation_prompt %} |
| {{- '<|im_start|>assistant\n' }} |
| {%- endif %} |
| |
