Anagram checker

({
  take: [
    { key: "anagram", type: "text", label: "Anagram text" },
    { key: "source", type: "text", label: "Source text" },
  ],
  make: ({ anagram, source }) => {
    anagram = anagram.toLowerCase().match(/[a-z]/g) || []
    source = source.toLowerCase().match(/[a-z]/g) || []

    let result = []
    let message = "Your anagram doesn't match yet."
    let value = false

    const diff = (a, b) =>
      a.filter((c) => {
        if (!b.includes(c)) return true
        b.splice(b.indexOf(c), 1)
        return false
      })

    const a = diff(anagram, [...source])
    const b = diff(source, [...anagram])

    if (a.length > 0) {
      result.push("It has these extra letters...")
      result.push(a.join("\t"))
    }

    if (b.length > 0) {
      result.push("It is missing some letters...")
      result.push(b.join("\t"))
    }

    if (a.length === 0 && b.length === 0) {
      value = true
      message = "Your anagram contains all the letters!"
    }

    return [
      { type: "status", value, message },
      result.length > 0 ? { type: "text", value: result.join("\n") } : null,
    ]
  },
})