react-native-ui-lib/src/components/textField/usePreset.js

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import underlinePreset from "./presets/underline";
import outlinePreset from "./presets/outline";
import { Presets } from "./types";
export default function usePreset({
  preset,
  ...props
}) {
  let presetConfig;
  if (preset === Presets.DEFAULT || preset === Presets.UNDERLINE) {
    presetConfig = underlinePreset;
  } else if (preset === Presets.OUTLINE) {
    presetConfig = outlinePreset;
  }
  if (presetConfig) {
    return {
      ...presetConfig,
      ...props,
      fieldStyle: [presetConfig.fieldStyle, props.fieldStyle]
    };
  }
  return props;
}