class DataviewUtils {
	static async loadScript(source, args={}){
		const promise = (this._isURL(source)) ?
			this._fetch(source) : app.vault.adapter.read(source)
		return promise.then(str => {
			return new Promise((resolve, reject) => {
				try {
					const argNames = Object.keys(args)
					const argValues = Object.values(args)
					const fn = new Function(...argNames, str)
					fn(...argValues)
					resolve()
				} catch (error) {
					reject(error)
				}
			})
		})
	}
	static async loadCSS(source) {
		const promise = (this._isURL(source)) ?
			this._fetch(source) : app.vault.adapter.read(source)
		return promise.then(str => {
			return new Promise((resolve) => {
				const elm = document.createElement('style')
				elm.textContent = str
				dv.container.appendChild(elm)
				resolve()
			})
		})
	}
	static _isURL(str) {
		return /^https?:\/\/[^\s/$.?#].[^\s]*$/i.test(str)
	}
	static async _fetch(url){
		return fetch(url).then(response => {
			if (!response.ok)
				throw new Error(`Failed to fetch file from ${url}: ${response.statusText}`)
			console.log(`loaded: ${url}`)
			return response.text()
		})
	}
}