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Merge pull request #30 from metrico/devel
fix: database management BUG #29
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,45 @@ | ||
import { createAction, createFeatureSelector, createReducer, createSelector, on, props } from '@ngrx/store'; | ||
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export const DB_KEY = 'DATA_BASE'; | ||
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export interface DBState { | ||
count: number; | ||
updatedAt?: number; | ||
} | ||
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/** ACTIONS */ | ||
export const add = createAction('[DATA_BASE] add'); | ||
export const remove = createAction('[DATA_BASE] remove'); | ||
export const update = createAction('[DATA_BASE] update'); | ||
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export const initialState: DBState = { | ||
count: 0 | ||
}; | ||
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/** REDUCERS */ | ||
export const dbReducer = createReducer( | ||
initialState, | ||
on(add, state => ({ | ||
...state, | ||
count: state.count + 1 | ||
})), | ||
on(remove, state => ({ | ||
...state, | ||
count: state.count - 1 | ||
})), | ||
on(update, state => ({ | ||
...state, | ||
count: 0 | ||
})) | ||
); | ||
/** SELECTORS */ | ||
export const featureSelector | ||
= createFeatureSelector<DBState>(DB_KEY); | ||
export const countSelector = createSelector( | ||
featureSelector, | ||
state => state.count | ||
); | ||
export const updatedAtSelector = createSelector( | ||
featureSelector, | ||
state => state.updatedAt | ||
); |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,19 @@ | ||
import { | ||
ActionReducer, | ||
ActionReducerMap, | ||
createFeatureSelector, | ||
createSelector, | ||
MetaReducer | ||
} from '@ngrx/store'; | ||
import { environment } from '../../environments/environment'; | ||
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export interface State { | ||
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} | ||
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export const reducers: ActionReducerMap<State> = { | ||
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}; | ||
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export const metaReducers: MetaReducer<State>[] = !environment.production ? [] : []; |