diff options
Diffstat (limited to 'app/models/root-store')
-rw-r--r-- | app/models/root-store/root-store-context.ts | 22 | ||||
-rw-r--r-- | app/models/root-store/root-store.ts | 20 | ||||
-rw-r--r-- | app/models/root-store/setup-root-store.ts | 55 |
3 files changed, 97 insertions, 0 deletions
diff --git a/app/models/root-store/root-store-context.ts b/app/models/root-store/root-store-context.ts new file mode 100644 index 0000000..537e51c --- /dev/null +++ b/app/models/root-store/root-store-context.ts @@ -0,0 +1,22 @@ +import { createContext, useContext } from "react" +import { RootStore } from "./root-store" + +/** + * Create a context we can use to + * - Provide access to our stores from our root component + * - Consume stores in our screens (or other components, though it's + * preferable to just connect screens) + */ +const RootStoreContext = createContext<RootStore>({} as RootStore) + +/** + * The provider our root component will use to expose the root store + */ +export const RootStoreProvider = RootStoreContext.Provider + +/** + * A hook that screens can use to gain access to our stores, with + * `const { someStore, someOtherStore } = useStores()`, + * or less likely: `const rootStore = useStores()` + */ +export const useStores = () => useContext(RootStoreContext) diff --git a/app/models/root-store/root-store.ts b/app/models/root-store/root-store.ts new file mode 100644 index 0000000..1131b48 --- /dev/null +++ b/app/models/root-store/root-store.ts @@ -0,0 +1,20 @@ +import { Instance, SnapshotOut, types } from "mobx-state-tree" +import { CharacterStoreModel } from "../character-store/character-store" + +/** + * A RootStore model. + */ +// prettier-ignore +export const RootStoreModel = types.model("RootStore").props({ + characterStore: types.optional(CharacterStoreModel, {} as any), +}) + +/** + * The RootStore instance. + */ +export interface RootStore extends Instance<typeof RootStoreModel> {} + +/** + * The data of a RootStore. + */ +export interface RootStoreSnapshot extends SnapshotOut<typeof RootStoreModel> {} diff --git a/app/models/root-store/setup-root-store.ts b/app/models/root-store/setup-root-store.ts new file mode 100644 index 0000000..4a6d0c5 --- /dev/null +++ b/app/models/root-store/setup-root-store.ts @@ -0,0 +1,55 @@ +import { onSnapshot } from "mobx-state-tree" +import { RootStoreModel, RootStore } from "./root-store" +import { Environment } from "../environment" +import * as storage from "../../utils/storage" + +/** + * The key we'll be saving our state as within async storage. + */ +const ROOT_STATE_STORAGE_KEY = "root" + +/** + * Setup the environment that all the models will be sharing. + * + * The environment includes other functions that will be picked from some + * of the models that get created later. This is how we loosly couple things + * like events between models. + */ +export async function createEnvironment() { + const env = new Environment() + await env.setup() + return env +} + +/** + * Setup the root state. + */ +export async function setupRootStore() { + let rootStore: RootStore + let data: any + + // prepare the environment that will be associated with the RootStore. + const env = await createEnvironment() + try { + // load data from storage + data = (await storage.load(ROOT_STATE_STORAGE_KEY)) || {} + rootStore = RootStoreModel.create(data, env) + } catch (e) { + // if there's any problems loading, then let's at least fallback to an empty state + // instead of crashing. + rootStore = RootStoreModel.create({}, env) + + // but please inform us what happened + __DEV__ && console.tron.error(e.message, null) + } + + // reactotron logging + if (__DEV__) { + env.reactotron.setRootStore(rootStore, data) + } + + // track changes & save to storage + onSnapshot(rootStore, (snapshot) => storage.save(ROOT_STATE_STORAGE_KEY, snapshot)) + + return rootStore +} |