ComfyUI_frontend/src/scripts/utils.ts

import { api } from './api'
import type { ComfyApp } from './app'
import { $el } from './ui'

// Simple date formatter
const parts = {
  d: (d) => d.getDate(),
  M: (d) => d.getMonth() + 1,
  h: (d) => d.getHours(),
  m: (d) => d.getMinutes(),
  s: (d) => d.getSeconds()
}
const format =
  Object.keys(parts)
    .map((k) => k + k + '?')
    .join('|') + '|yyy?y?'

function formatDate(text: string, date: Date) {
  return text.replace(new RegExp(format, 'g'), (text: string): string => {
    if (text === 'yy') return (date.getFullYear() + '').substring(2)
    if (text === 'yyyy') return date.getFullYear().toString()
    if (text[0] in parts) {
      const p = parts[text[0]](date)
      return (p + '').padStart(text.length, '0')
    }
    return text
  })
}

export function clone(obj) {
  try {
    if (typeof structuredClone !== 'undefined') {
      return structuredClone(obj)
    }
  } catch (error) {
    // structuredClone is stricter than using JSON.parse/stringify so fallback to that
  }

  return JSON.parse(JSON.stringify(obj))
}

export function applyTextReplacements(app: ComfyApp, value: string): string {
  return value.replace(/%([^%]+)%/g, function (match, text) {
    const split = text.split('.')
    if (split.length !== 2) {
      // Special handling for dates
      if (split[0].startsWith('date:')) {
        return formatDate(split[0].substring(5), new Date())
      }

      if (text !== 'width' && text !== 'height') {
        // Dont warn on standard replacements
        console.warn('Invalid replacement pattern', text)
      }
      return match
    }

    // Find node with matching S&R property name
    let nodes = app.graph.nodes.filter(
      (n) => n.properties?.['Node name for S&R'] === split[0]
    )
    // If we cant, see if there is a node with that title
    if (!nodes.length) {
      nodes = app.graph.nodes.filter((n) => n.title === split[0])
    }
    if (!nodes.length) {
      console.warn('Unable to find node', split[0])
      return match
    }

    if (nodes.length > 1) {
      console.warn('Multiple nodes matched', split[0], 'using first match')
    }

    const node = nodes[0]

    const widget = node.widgets?.find((w) => w.name === split[1])
    if (!widget) {
      console.warn('Unable to find widget', split[1], 'on node', split[0], node)
      return match
    }

    return ((widget.value ?? '') + '').replaceAll(/\/|\\/g, '_')
  })
}

export async function addStylesheet(
  urlOrFile: string,
  relativeTo?: string
): Promise<void> {
  return new Promise((res, rej) => {
    let url
    if (urlOrFile.endsWith('.js')) {
      url = urlOrFile.substr(0, urlOrFile.length - 2) + 'css'
    } else {
      url = new URL(
        urlOrFile,
        relativeTo ?? `${window.location.protocol}//${window.location.host}`
      ).toString()
    }
    $el('link', {
      parent: document.head,
      rel: 'stylesheet',
      type: 'text/css',
      href: url,
      onload: res,
      onerror: rej
    })
  })
}

/**
 * @param { string } filename
 * @param { Blob } blob
 */
export function downloadBlob(filename, blob) {
  const url = URL.createObjectURL(blob)
  const a = $el('a', {
    href: url,
    download: filename,
    style: { display: 'none' },
    parent: document.body
  })
  a.click()
  setTimeout(function () {
    a.remove()
    window.URL.revokeObjectURL(url)
  }, 0)
}

export function prop<T>(
  target: object,
  name: string,
  defaultValue: T,
  onChanged?: (
    currentValue: T,
    previousValue: T,
    target: object,
    name: string
  ) => void
): T {
  let currentValue
  Object.defineProperty(target, name, {
    get() {
      return currentValue
    },
    set(newValue) {
      const prevValue = currentValue
      currentValue = newValue
      onChanged?.(currentValue, prevValue, target, name)
    }
  })
  return defaultValue
}

export function getStorageValue(id: string) {
  const clientId = api.clientId ?? api.initialClientId
  return (
    (clientId && sessionStorage.getItem(`${id}:${clientId}`)) ??
    localStorage.getItem(id)
  )
}

export function setStorageValue(id: string, value: string) {
  const clientId = api.clientId ?? api.initialClientId
  if (clientId) {
    sessionStorage.setItem(`${id}:${clientId}`, value)
  }
  localStorage.setItem(id, value)
}