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// Parses the `text`.
//
// Returns `{ value, caret }` where `caret` is
// the caret position inside `value`
// corresponding to the `caret_position` inside `text`.
//
// The `text` is parsed by feeding each character sequentially to
// `parse_character(character, value)` function
// and appending the result (if it's not `undefined`) to `value`.
//
// Example:
//
// `text` is `8 (800) 555-35-35`,
// `caret_position` is `4` (before the first `0`).
// `parse_character` is `(character, value) =>
// if (character >= '0' && character <= '9') { return character }`.
//
// then `parse()` outputs `{ value: '88005553535', caret: 2 }`.
//
export default function parse(text, caret_position, parse_character)
{
let value = ''
let focused_input_character_index = 0
let index = 0
while (index < text.length)
{
const character = parse_character(text[index], value)
if (character !== undefined)
{
value += character
if (caret_position !== undefined)
{
if (caret_position === index)
{
focused_input_character_index = value.length - 1;
}
else if (caret_position > index)
{
focused_input_character_index = value.length
}
}
}
index++
}
// If caret position wasn't specified
if (caret_position === undefined)
{
// Then set caret position to "after the last input character"
focused_input_character_index = value.length
}
const result =
{
value,
caret : focused_input_character_index
}
return result
}
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