smartfm/ts/index.ts

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import grayMatter from 'gray-matter';
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export type TFrontMatter = 'yaml' | 'json';
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export interface ISmartfmContructorOptions {
fmType: TFrontMatter;
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}
/**
* class smartfm handles frontmatter
*/
export class Smartfm {
fmType: TFrontMatter;
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constructor(optionsArg: ISmartfmContructorOptions) {
this.fmType = optionsArg.fmType;
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}
/**
* add frontmatter to a string
*/
stringify(bodyString: string, frontmatterData: any) {
return grayMatter.stringify(bodyString, frontmatterData);
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}
/**
* parse a string that has frontmatter attached, YAML notation
*/
parse(stringToParse: string) {
return grayMatter(stringToParse);
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}
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/**
* parse from commnets
*/
parseFromComments(commentStart: string, stringToParse: string) {
const diffFunc = (diffMe, diffBy) => diffMe.split(diffBy).join('');
let lines = stringToParse.split('\n');
lines = lines.map(line => {
return diffFunc(line, commentStart);
});
const cleanedString = lines.join('\n');
return this.parse(cleanedString);
}
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}