react-native-image-converter/index.js

image converter module

import { NativeModules, Platform } from 'react-native'

var { RNImageConverter } = NativeModules;

class IImageConverter {
    static convert(param) {
        if (param.hasOwnProperty('grayscale')) {
            param.grayscale = param.grayscale.toString().toLowerCase();
        } else {
            param.grayscale = "false";
        }
        if (param.hasOwnProperty('base64')) {
            param.base64 = param.base64.toString().toLowerCase();
        } else {
            param.base64 = "false";
        }
        if (param.hasOwnProperty('resizeRatio')) {
            param.resizeRatio = IImageConverter.checkToInputValue(param.resizeRatio);
        } else {
            param.resizeRatio = "1.0";
        }
        if (param.hasOwnProperty('imageQuality')) {
            param.imageQuality = IImageConverter.checkToInputValue(param.imageQuality);
        } else {
            param.imageQuality = "1.0";
        }

        try {
            if (Platform.OS === "ios") {
                return RNImageConverter.imageConvert(param).then(result => (result));
            } else if (Platform.OS === "android") {
                return new Promise((resolve) => {
                    RNImageConverter.imageConvert(param, resolve);
                  });
            } else {
                return {
                    success: false,
                    errorMsg: "not yet supported.("+Platform.OS+")"
                }
            }
        } catch(error) {
            return {
                success: false,
                errorMsg: "check your native("+Platform.OS+") module setting."
            }
        }
    }

    static checkToInputValue(inputValue) {
        try {
            var checkDataToString = inputValue.toString();
            var checkData = parseFloat(checkDataToString);
            if (checkData <= 0 || checkData > 1.0) {
                return "1.0";
            } else {
                return checkDataToString;
            }
        } catch(error) {
            return "1.0";
        }
    }
}

export default IImageConverter;