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import TransitionRule, { ITransitionDescriptor, ITransitionFork } from './lib/transition-rule';
export interface ITransitionGroupProps {
name: string;
duration: number;
}
interface ITransitionMap {
[name: string]: ITransitionFork;
}
/**
* Transition descriptors
*/
const transitions: ITransitionMap = {
slide: {
forward: {
name: 'slide-up',
duration: 450,
},
backward: {
name: 'slide-down',
duration: 450,
},
},
push: {
forward: {
name: 'push',
duration: 450,
},
backward: {
name: 'pop',
duration: 450,
},
},
};
/**
* Transition rules
* (null) is used to indicate any route.
*/
const transitionRules = [
r('/settings', '/settings/language', transitions.push),
r('/settings', '/settings/account', transitions.push),
r('/settings', '/settings/preferences', transitions.push),
r('/settings', '/settings/advanced', transitions.push),
r('/settings/advanced', '/settings/advanced/wireguard-keys', transitions.push),
r('/settings/advanced', '/settings/advanced/linux-split-tunneling', transitions.push),
r('/settings', '/settings/support', transitions.push),
r(null, '/settings', transitions.slide),
r(null, '/select-location', transitions.slide),
];
/**
* Calculate TransitionGroup props.
*
* @param {string} [fromRoute] - source route
* @param {string} toRoute - target route
*/
export function getTransitionProps(
fromRoute: string | null,
toRoute: string,
): ITransitionGroupProps {
// ignore initial transition and transition between the same routes
if (!fromRoute || fromRoute === toRoute) {
return noTransitionProps();
}
for (const rule of transitionRules) {
const match = rule.match(fromRoute, toRoute);
if (match) {
return toTransitionGroupProps(match.descriptor);
}
}
return noTransitionProps();
}
/**
* Integrate ITransitionDescriptor into ITransitionGroupProps
* @param {ITransitionDescriptor} descriptor
*/
function toTransitionGroupProps(descriptor: ITransitionDescriptor): ITransitionGroupProps {
const { name, duration } = descriptor;
return {
name,
duration,
};
}
/**
* Returns default props with no animation
*/
function noTransitionProps(): ITransitionGroupProps {
return {
name: '',
duration: 0,
};
}
/**
* Shortcut to create TransitionRule
*/
function r(from: string | null, to: string, fork: ITransitionFork): TransitionRule {
return new TransitionRule(from, to, fork);
}
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