| 1 | import { exportaAHtml } from "./exportaAHtml.js" |
| 2 | import { ProblemDetails } from "./ProblemDetails.js" |
| 3 | |
| 4 | /** |
| 5 | * Espera a que la promesa de un fetch termine. Si |
| 6 | * hay error, lanza una excepción. Si no hay error, |
| 7 | * interpreta la respuesta del servidor como JSON y |
| 8 | * la convierte en una literal de objeto. |
| 9 | * |
| 10 | * @param { string | Promise<Response> } servicio |
| 11 | */ |
| 12 | export async function consumeJson(servicio) { |
| 13 | |
| 14 | if (typeof servicio === "string") { |
| 15 | servicio = fetch(servicio, { |
| 16 | headers: { "Accept": "application/json, application/problem+json" } |
| 17 | }) |
| 18 | } else if (!(servicio instanceof Promise)) { |
| 19 | throw new Error("Servicio de tipo incorrecto.") |
| 20 | } |
| 21 | |
| 22 | const respuesta = await servicio |
| 23 | |
| 24 | const headers = respuesta.headers |
| 25 | |
| 26 | if (respuesta.ok) { |
| 27 | // Aparentemente el servidor tuvo éxito. |
| 28 | |
| 29 | if (respuesta.status === 204) { |
| 30 | // No contiene texto de respuesta. |
| 31 | |
| 32 | return { headers, body: {} } |
| 33 | |
| 34 | } else { |
| 35 | |
| 36 | const texto = await respuesta.text() |
| 37 | |
| 38 | try { |
| 39 | |
| 40 | return { headers, body: JSON.parse(texto) } |
| 41 | |
| 42 | } catch (error) { |
| 43 | |
| 44 | // El contenido no es JSON. Probablemente sea texto de un error. |
| 45 | throw new ProblemDetails(respuesta.status, headers, texto, |
| 46 | "/error/errorinterno.html") |
| 47 | |
| 48 | } |
| 49 | |
| 50 | } |
| 51 | |
| 52 | } else { |
| 53 | // Hay un error. |
| 54 | |
| 55 | const texto = await respuesta.text() |
| 56 | |
| 57 | if (texto === "") { |
| 58 | |
| 59 | // No hay texto. Se usa el texto predeterminado. |
| 60 | throw new ProblemDetails(respuesta.status, headers, respuesta.statusText) |
| 61 | |
| 62 | } else { |
| 63 | // Debiera se un ProblemDetails en JSON. |
| 64 | |
| 65 | try { |
| 66 | |
| 67 | const { title, type, detail } = JSON.parse(texto) |
| 68 | |
| 69 | throw new ProblemDetails(respuesta.status, headers, |
| 70 | typeof title === "string" ? title : respuesta.statusText, |
| 71 | typeof type === "string" ? type : undefined, |
| 72 | typeof detail === "string" ? detail : undefined) |
| 73 | |
| 74 | } catch (error) { |
| 75 | |
| 76 | if (error instanceof ProblemDetails) { |
| 77 | // El error si era un ProblemDetails |
| 78 | |
| 79 | throw error |
| 80 | |
| 81 | } else { |
| 82 | |
| 83 | throw new ProblemDetails(respuesta.status, headers, respuesta.statusText, |
| 84 | undefined, texto) |
| 85 | |
| 86 | } |
| 87 | |
| 88 | } |
| 89 | |
| 90 | } |
| 91 | |
| 92 | } |
| 93 | |
| 94 | } |
| 95 | |
| 96 | exportaAHtml(consumeJson) |
| 1 | /** |
| 2 | * Permite que los eventos de html usen la función. |
| 3 | * @param {function} functionInstance |
| 4 | */ |
| 5 | export function exportaAHtml(functionInstance) { |
| 6 | window[nombreDeFuncionParaHtml(functionInstance)] = functionInstance |
| 7 | } |
| 8 | |
| 9 | /** |
| 10 | * @param {function} valor |
| 11 | */ |
| 12 | export function nombreDeFuncionParaHtml(valor) { |
| 13 | const names = valor.name.split(/\s+/g) |
| 14 | return names[names.length - 1] |
| 15 | } |
| 1 | import { exportaAHtml } from "./exportaAHtml.js" |
| 2 | import { ProblemDetails } from "./ProblemDetails.js" |
| 3 | |
| 4 | /** |
| 5 | * Muestra un error en la consola y en un cuadro de |
| 6 | * alerta el mensaje de una excepción. |
| 7 | * @param { ProblemDetails | Error | null } error descripción del error. |
| 8 | */ |
| 9 | export function muestraError(error) { |
| 10 | |
| 11 | if (error === null) { |
| 12 | |
| 13 | console.error("Error") |
| 14 | alert("Error") |
| 15 | |
| 16 | } else if (error instanceof ProblemDetails) { |
| 17 | |
| 18 | let mensaje = error.title |
| 19 | if (error.detail) { |
| 20 | mensaje += `\n\n${error.detail}` |
| 21 | } |
| 22 | mensaje += `\n\nCódigo: ${error.status}` |
| 23 | if (error.type) { |
| 24 | mensaje += ` ${error.type}` |
| 25 | } |
| 26 | |
| 27 | console.error(mensaje) |
| 28 | console.error(error) |
| 29 | console.error("Headers:") |
| 30 | error.headers.forEach((valor, llave) => console.error(llave, "=", valor)) |
| 31 | alert(mensaje) |
| 32 | |
| 33 | } else { |
| 34 | |
| 35 | console.error(error) |
| 36 | alert(error.message) |
| 37 | |
| 38 | } |
| 39 | |
| 40 | } |
| 41 | |
| 42 | exportaAHtml(muestraError) |
| 1 | import { exportaAHtml } from "./exportaAHtml.js" |
| 2 | |
| 3 | /** |
| 4 | * @param { Document | HTMLElement } raizHtml |
| 5 | * @param { any } objeto |
| 6 | */ |
| 7 | export function muestraObjeto(raizHtml, objeto) { |
| 8 | |
| 9 | for (const [nombre, definiciones] of Object.entries(objeto)) { |
| 10 | |
| 11 | if (Array.isArray(definiciones)) { |
| 12 | |
| 13 | muestraArray(raizHtml, nombre, definiciones) |
| 14 | |
| 15 | } else if (definiciones !== undefined && definiciones !== null) { |
| 16 | |
| 17 | const elementoHtml = buscaElementoHtml(raizHtml, nombre) |
| 18 | |
| 19 | if (elementoHtml instanceof HTMLInputElement) { |
| 20 | |
| 21 | muestraInput(raizHtml, elementoHtml, definiciones) |
| 22 | |
| 23 | } else if (elementoHtml !== null) { |
| 24 | |
| 25 | for (const [atributo, valor] of Object.entries(definiciones)) { |
| 26 | if (atributo in elementoHtml) { |
| 27 | elementoHtml[atributo] = valor |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | } |
| 32 | |
| 33 | } |
| 34 | |
| 35 | } |
| 36 | |
| 37 | } |
| 38 | exportaAHtml(muestraObjeto) |
| 39 | |
| 40 | /** |
| 41 | * @param { Document | HTMLElement } raizHtml |
| 42 | * @param { string } nombre |
| 43 | */ |
| 44 | export function buscaElementoHtml(raizHtml, nombre) { |
| 45 | return raizHtml.querySelector( |
| 46 | `#${nombre},[name="${nombre}"],[data-name="${nombre}"]`) |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * @param { Document | HTMLElement } raizHtml |
| 51 | * @param { string } propiedad |
| 52 | * @param {any[]} valores |
| 53 | */ |
| 54 | function muestraArray(raizHtml, propiedad, valores) { |
| 55 | |
| 56 | const conjunto = new Set(valores) |
| 57 | const elementos = |
| 58 | raizHtml.querySelectorAll(`[name="${propiedad}"],[data-name="${propiedad}"]`) |
| 59 | |
| 60 | if (elementos.length === 1) { |
| 61 | const elemento = elementos[0] |
| 62 | |
| 63 | if (elemento instanceof HTMLSelectElement) { |
| 64 | const options = elemento.options |
| 65 | for (let i = 0, len = options.length; i < len; i++) { |
| 66 | const option = options[i] |
| 67 | option.selected = conjunto.has(option.value) |
| 68 | } |
| 69 | return |
| 70 | } |
| 71 | |
| 72 | } |
| 73 | |
| 74 | for (let i = 0, len = elementos.length; i < len; i++) { |
| 75 | const elemento = elementos[i] |
| 76 | if (elemento instanceof HTMLInputElement) { |
| 77 | elemento.checked = conjunto.has(elemento.value) |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * @param { Document | HTMLElement } raizHtml |
| 85 | * @param { HTMLInputElement } input |
| 86 | * @param { any } definiciones |
| 87 | */ |
| 88 | function muestraInput(raizHtml, input, definiciones) { |
| 89 | |
| 90 | for (const [atributo, valor] of Object.entries(definiciones)) { |
| 91 | |
| 92 | if (atributo == "data-file") { |
| 93 | |
| 94 | const img = getImgParaElementoHtml(raizHtml, input) |
| 95 | if (img !== null) { |
| 96 | input.dataset.file = valor |
| 97 | input.value = "" |
| 98 | if (valor === "") { |
| 99 | img.src = "" |
| 100 | img.hidden = true |
| 101 | } else { |
| 102 | img.src = valor |
| 103 | img.hidden = false |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | } else if (atributo in input) { |
| 108 | |
| 109 | input[atributo] = valor |
| 110 | |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * @param { Document | HTMLElement } raizHtml |
| 118 | * @param { HTMLElement } elementoHtml |
| 119 | */ |
| 120 | export function getImgParaElementoHtml(raizHtml, elementoHtml) { |
| 121 | const imgId = elementoHtml.getAttribute("data-img") |
| 122 | if (imgId === null) { |
| 123 | return null |
| 124 | } else { |
| 125 | const input = buscaElementoHtml(raizHtml, imgId) |
| 126 | if (input instanceof HTMLImageElement) { |
| 127 | return input |
| 128 | } else { |
| 129 | return null |
| 130 | } |
| 131 | } |
| 132 | } |
| 1 | /** |
| 2 | * Detalle de los errores devueltos por un servicio. |
| 3 | */ |
| 4 | export class ProblemDetails extends Error { |
| 5 | |
| 6 | /** |
| 7 | * @param {number} status |
| 8 | * @param {Headers} headers |
| 9 | * @param {string} title |
| 10 | * @param {string} [type] |
| 11 | * @param {string} [detail] |
| 12 | */ |
| 13 | constructor(status, headers, title, type, detail) { |
| 14 | super(title) |
| 15 | /** |
| 16 | * @readonly |
| 17 | */ |
| 18 | this.status = status |
| 19 | /** |
| 20 | * @readonly |
| 21 | */ |
| 22 | this.headers = headers |
| 23 | /** |
| 24 | * @readonly |
| 25 | */ |
| 26 | this.type = type |
| 27 | /** |
| 28 | * @readonly |
| 29 | */ |
| 30 | this.detail = detail |
| 31 | /** |
| 32 | * @readonly |
| 33 | */ |
| 34 | this.title = title |
| 35 | } |
| 36 | |
| 37 | } |