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import { getContext } from 'svelte';
import { BROWSER } from 'esm-env';
import { stores as browser_stores } from '../client/client.js';
/**
* A function that returns all of the contextual stores. On the server, this must be called during component initialization.
* Only use this if you need to defer store subscription until after the component has mounted, for some reason.
*/
export const getStores = () => {
const stores = BROWSER ? browser_stores : getContext('__svelte__');
return {
/** @type {typeof page} */
page: {
subscribe: stores.page.subscribe
},
/** @type {typeof navigating} */
navigating: {
subscribe: stores.navigating.subscribe
},
/** @type {typeof updated} */
updated: stores.updated
};
};
/**
* A readable store whose value contains page data.
*
* On the server, this store can only be subscribed to during component initialization. In the browser, it can be subscribed to at any time.
*
* @type {import('svelte/store').Readable<import('@sveltejs/kit').Page>}
*/
export const page = {
subscribe(fn) {
const store = __SVELTEKIT_DEV__ ? get_store('page') : getStores().page;
return store.subscribe(fn);
}
};
/**
* A readable store.
* When navigating starts, its value is a `Navigation` object with `from`, `to`, `type` and (if `type === 'popstate'`) `delta` properties.
* When navigating finishes, its value reverts to `null`.
*
* On the server, this store can only be subscribed to during component initialization. In the browser, it can be subscribed to at any time.
* @type {import('svelte/store').Readable<import('@sveltejs/kit').Navigation | null>}
*/
export const navigating = {
subscribe(fn) {
const store = __SVELTEKIT_DEV__ ? get_store('navigating') : getStores().navigating;
return store.subscribe(fn);
}
};
/**
* A readable store whose initial value is `false`. If [`version.pollInterval`](https://kit.svelte.dev/docs/configuration#version) is a non-zero value, SvelteKit will poll for new versions of the app and update the store value to `true` when it detects one. `updated.check()` will force an immediate check, regardless of polling.
*
* On the server, this store can only be subscribed to during component initialization. In the browser, it can be subscribed to at any time.
* @type {import('svelte/store').Readable<boolean> & { check(): Promise<boolean> }}
*/
export const updated = {
subscribe(fn) {
const store = __SVELTEKIT_DEV__ ? get_store('updated') : getStores().updated;
if (BROWSER) {
updated.check = store.check;
}
return store.subscribe(fn);
},
check: () => {
throw new Error(
BROWSER
? 'Cannot check updated store before subscribing'
: 'Can only check updated store in browser'
);
}
};
/**
* @template {keyof ReturnType<typeof getStores>} Name
* @param {Name} name
* @returns {ReturnType<typeof getStores>[Name]}
*/
function get_store(name) {
try {
return getStores()[name];
} catch {
throw new Error(
`Cannot subscribe to '${name}' store on the server outside of a Svelte component, as it is bound to the current request via component context. This prevents state from leaking between users.` +
'For more information, see https://kit.svelte.dev/docs/state-management#avoid-shared-state-on-the-server'
);
}
}
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