react-native-device-info
Version:
Get device information using react-native
83 lines (74 loc) • 2.17 kB
JavaScript
import { Platform } from 'react-native';
// centralized memo object
let memo = {};
export function clearMemo() {
memo = {};
}
/**
* function returns the proper getter based current platform X supported platforms
* @param supportedPlatforms array of supported platforms (OS)
* @param getter desired function used to get info
* @param defaultGetter getter that returns a default value if desired getter is not supported by current platform
*/
function getSupportedFunction(supportedPlatforms, getter, defaultGetter) {
let supportedMap = {};
supportedPlatforms.filter(key => Platform.OS == key).forEach(key => supportedMap[key] = getter);
return Platform.select({ ...supportedMap,
default: defaultGetter
});
}
/**
* function used to get desired info synchronously — with optional memoization
* @param param0
*/
export function getSupportedPlatformInfoSync({
getter,
supportedPlatforms,
defaultValue,
memoKey
}) {
if (memoKey && memo[memoKey] != undefined) {
return memo[memoKey];
} else {
const output = getSupportedFunction(supportedPlatforms, getter, () => defaultValue)();
if (memoKey) {
memo[memoKey] = output;
}
return output;
}
}
/**
* function used to get desired info asynchronously — with optional memoization
* @param param0
*/
export async function getSupportedPlatformInfoAsync({
getter,
supportedPlatforms,
defaultValue,
memoKey
}) {
if (memoKey && memo[memoKey] != undefined) {
return memo[memoKey];
} else {
const output = await getSupportedFunction(supportedPlatforms, getter, () => Promise.resolve(defaultValue))();
if (memoKey) {
memo[memoKey] = output;
}
return output;
}
}
/**
* function that returns array of getter functions [async, sync]
* @param param0
*/
export function getSupportedPlatformInfoFunctions({
syncGetter,
...asyncParams
}) {
return [(...args) => getSupportedPlatformInfoAsync({ ...asyncParams,
getter: () => asyncParams.getter(...args)
}), (...args) => getSupportedPlatformInfoSync({ ...asyncParams,
getter: () => syncGetter(...args)
})];
}
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