import getTypeOf from "../getTypeOf";

const OBJECT_TYPE = "object";
const ARRAY_TYPE = "array";

/**
 * Renders data into a string by {{variables}}.
 * Given a template string, removes all {{property}} substrings and replaces them with the property in the given data
 *
 * @param template - template string containing variables in handelbars/mustache style
 * @param data - flat object containing properties matching variables
 * @return rendered string
 */
export default function render(template: string, data: { [p: string]: any } = {}): string {
    return template.replace(/\{\{\w+\}\}/g, (match) => {
        const key = match.replace(/[{}]/g, "");
        const variable = data[key];
        const variableType = getTypeOf(variable);
        if (variableType === OBJECT_TYPE || variableType === ARRAY_TYPE) {
            return JSON.stringify(variable);
        }
        return variable;
    });
}