TextWatcherUtils.kt

import android.content.Context
import android.text.Editable
import android.text.TextWatcher
import android.widget.EditText

class TextWatcherUtils {
    fun mobilePhoneRequired(context: Context, editText: EditText): TextWatcher {
        val textWatcher = object : TextWatcher {
            override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {}
            override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {}
            override fun afterTextChanged(s: Editable?) {
                if (s == null || s.isEmpty()) {
                    editText.error = context.getString(R.string.lblCompulsory)

                } else {
                    val validationDto = validate(context, Validate.Mobile, s.toString())
                    if (!validationDto.isValid) {
                        editText.error = validationDto.errorMessage

                    } else {
                        editText.error = null
                    }
                }
            }
        }

        return textWatcher
    }

    fun nationalIdRequired(context: Context, editText: EditText): TextWatcher {
        val textWatcher = object : TextWatcher {
            override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {}
            override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {}
            override fun afterTextChanged(s: Editable?) {
                if (s == null || s.isEmpty()) {
                    editText.error = context.getString(R.string.lblCompulsory)

                } else {
                    val validationDto = validate(context, Validate.NationalId, s.toString())
                    if (!validationDto.isValid) {
                        editText.error = validationDto.errorMessage

                    } else {
                        editText.error = null
                    }
                }
            }
        }

        return textWatcher
    }

    fun separateThousands(context: Context, editText: EditText, groupingSeparator: Char, decimalSeparator: Char): TextWatcher {
        val textWatcher = object : TextWatcher {
//            editText.removeTextChangedListener(this)

            private var busy = false

            override fun afterTextChanged(s: Editable?) {

                if (s == null || s.isEmpty()) {
                    editText.error = context.getString(R.string.lblCompulsory)

                } else if (!busy) {
                    busy = true
                    var place = 0

                    val decimalPointIndex = s.indexOf(decimalSeparator)
                    var i = if (decimalPointIndex == -1) {
                        s.length - 1
                    } else {
                        decimalPointIndex - 1
                    }
                    while (i >= 0) {
                        val c = s[i]
                        if (c == groupingSeparator) {
                            s.delete(i, i + 1)
                        } else {
                            if (place % 3 == 0 && place != 0) {
                                // insert a comma to the left of every 3rd digit (counting from right to
                                // left) unless it's the leftmost digit
                                s.insert(i + 1, groupingSeparator.toString())
                            }
                            place++
                        }
                        i--
                    }

                    busy = false
                }
            }

            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
            }

            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
            }
        }
        return textWatcher
    }
}