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Add support for <mj-include> and global sample data #4

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Add support for <mj-include> and global sample data #4

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14 changes: 12 additions & 2 deletions src/helper.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -148,18 +148,28 @@ export function compileContent(document: TextDocument, fsPath = document.uri.fsP
const themeProps = existsSync(themeFile) ? JSON.parse(readFileSync(themeFile).toString()) : {};
const propsFile = document.uri.fsPath.replace('.mjml', '.sample.json');
const props = existsSync(propsFile) ? JSON.parse(readFileSync(propsFile).toString()) : {};
const finalProps = { theme: themeProps, ...props };
const globalPropsFile = document.uri.fsPath.replace(parsedDocumentPath.base, '_base.sample.json');
const globalProps = existsSync(globalPropsFile) ? JSON.parse(readFileSync(globalPropsFile).toString()) : {};
const finalProps = { theme: themeProps, ...globalProps, ...props };
Handlebars.registerHelper('include', (partial: string) => {
const partialPath = path.resolve(parsedDocumentPath.dir, `${partial}.mjml`);
const partialBlob = readFileSync(partialPath, 'utf8');
const partialCompiled = Handlebars.compile(partialBlob)(finalProps);
return new Handlebars.SafeString(partialCompiled);
});
const compiled = Handlebars.compile(text)(finalProps);
const compiled = Handlebars.compile(processMjIncludes(text))(finalProps);
const { html, errors } = mjmlToHtml(compiled, minify, beautify, fsPath, validation);
if (errors !== undefined && errors.length === 1 && errors[0].message === 'Malformed MJML. Check that your structure is correct and enclosed in <mjml> tags.') {
// we may be trying to preview a partial, retry with wrapping it in <mjml><mj-body></mj-body></mjml>
return mjmlToHtml(`<mjml><mj-body>${compiled}</mj-body></mjml>`, minify, beautify, fsPath, validation);
}
return { html, errors };
}

/**
* Replaces instances of `<mj-include path="..." />` with `{{ include "..." }}`, so that *.sample.json works across includes
* @param content the content to replace in
*/
function processMjIncludes(content: string): string {
return content.replace(/<mj-include\s+path="([^"]+)"\s*\/>/, (_, path) => `{{ include "${path}" }}`)
}