| 1 | module dtm |
| 2 | |
| 3 | import x.templating.dtm2 |
| 4 | |
| 5 | // new_dtm2_render_engine is the compatibility boundary between the historical |
| 6 | // DTM API and the DTM2 runtime template engine. DTM2 remains unaware |
| 7 | // of legacy cache concepts; it only parses templates and renders them. |
| 8 | fn new_dtm2_render_engine(template_dir string, compress_html bool) &dtm2.Manager { |
| 9 | return dtm2.initialize( |
| 10 | template_dir: template_dir |
| 11 | compress_html: compress_html |
| 12 | reload_modified_templates: true |
| 13 | ) |
| 14 | } |
| 15 | |
| 16 | fn (mut tm DynamicTemplateManager) expand_with_dtm2_render_engine(tmpl_path string, tmpl_var TemplateCacheParams) string { |
| 17 | validate_legacy_placeholder_sizes(tmpl_path, tmpl_var.placeholders) or { |
| 18 | eprintln(err.msg()) |
| 19 | return internat_server_error |
| 20 | } |
| 21 | if isnil(tm.render_engine) { |
| 22 | tm.render_engine = new_dtm2_render_engine(tm.template_folder, tm.compress_html) |
| 23 | } |
| 24 | placeholders := convert_legacy_placeholders(tmpl_var.placeholders) |
| 25 | return tm.render_engine.expand(tmpl_path, |
| 26 | placeholders: &placeholders |
| 27 | missing_placeholder_prefix: '$' |
| 28 | ) |
| 29 | } |
| 30 | |
| 31 | fn validate_legacy_placeholder_sizes(tmpl_path string, placeholders &map[string]DtmMultiTypeMap) ! { |
| 32 | for key, value in placeholders { |
| 33 | if key.len > max_placeholders_key_size { |
| 34 | return error('${message_signature_error} Length of placeholder key "${key}" exceeds the maximum allowed size for template content in file: ${tmpl_path}. Max allowed size: ${max_placeholders_key_size} characters.') |
| 35 | } |
| 36 | casted_value := legacy_placeholder_value_to_string(*value) |
| 37 | if casted_value.len > max_placeholders_value_size { |
| 38 | return error('${message_signature_error} Length of placeholder value for key "${key}" exceeds the maximum allowed size for template content in file: ${tmpl_path}. Max allowed size: ${max_placeholders_value_size} characters.') |
| 39 | } |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | fn convert_legacy_placeholders(placeholders &map[string]DtmMultiTypeMap) map[string]string { |
| 44 | mut converted := map[string]string{} |
| 45 | for key, value in placeholders { |
| 46 | converted[key.clone()] = legacy_placeholder_value_to_string(*value).clone() |
| 47 | } |
| 48 | return converted |
| 49 | } |
| 50 | |
| 51 | fn legacy_placeholder_value_to_string(value DtmMultiTypeMap) string { |
| 52 | return match value { |
| 53 | f32 { value.str() } |
| 54 | f64 { value.str() } |
| 55 | i16 { value.str() } |
| 56 | i64 { value.str() } |
| 57 | i8 { value.str() } |
| 58 | int { value.str() } |
| 59 | string { value.clone() } |
| 60 | u16 { value.str() } |
| 61 | u32 { value.str() } |
| 62 | u64 { value.str() } |
| 63 | u8 { value.str() } |
| 64 | } |
| 65 | } |
| 66 | |