66 lines
2.2 KiB
JavaScript
66 lines
2.2 KiB
JavaScript
import { log } from "console"
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/**
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* Flattens an object into a 1 level deep object.
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* { a: { b: 1, c: 2 } } --> { "a.b": 1, "a.c": 2 }
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* @param {Object} object
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* @return {Object}
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*/
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function flattenObject(object) {
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let finalObject = {}
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for (const key in object) {
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// Skip if key isn't own.
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if (!Object.prototype.hasOwnProperty.call(object, key))
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continue
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if (typeof object[key] === "object" && object[key] !== null) {
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const flattenedObject = flattenObject(object[key])
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for (const innerKey in flattenedObject) {
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// Skip if key isn't own.
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if (!Object.prototype.hasOwnProperty.call(flattenedObject, innerKey))
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continue
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finalObject[`${key}.${innerKey}`] = flattenedObject[innerKey]
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}
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} else {
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finalObject[key] = object[key]
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}
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}
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return finalObject
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}
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export default function parseTemplate(template, data) {
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const flattenedData = flattenObject(data)
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if (process.env.NODE_ENV === "debug")
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log(flattenedData)
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return template
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// Syntax: {{ variableName }}
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// Does: Inserts a variable, if it exists.
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.replace(
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/{{\s*(\S+?)\s*}}/gm,
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(match, variableName) => {
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if (flattenedData[variableName] === undefined || flattenedData[variableName] === null) {
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throw new Error(`Error: "${variableName}" is not defined`)
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}
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return flattenedData[variableName]
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}
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)
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// Syntax:
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// {% if variableName %}
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// <code to include>
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// {% endif %}
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// Does: includes <code to include> if variableName exists and is true.
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.replace(
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/^{%\s*if\s*(\S+?)\s*%}$([\s\S]*?)^{%\s*endif\s*%}$/gm,
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(match, variableName, codeBlock) => {
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if (flattenedData[variableName] === undefined || flattenedData[variableName] === null) {
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throw new Error(`Error: "${variableName}" is not defined`)
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}
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return flattenedData[variableName] ? codeBlock : ""
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}
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)
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} |