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import type {Pattern, Action, ArrayActionType} from '../types';
type ArrayAction = Action<ArrayActionType>;
export default class ArrayPattern implements Pattern<ArrayAction> {
actions: Array<ArrayAction>;
constructor() {
this.actions = [];
}
removeAllActionIfDeleteAfterCreate = () => {
if (this.actions.length >= 2 &&
this.actions[0].type === 'CREATE_ARRAY' &&
this.actions.slice(-1)[0].type === 'DELETE_ARRAY'
) {
this.actions = [];
}
}
removeAllUpdateBeforeDelete = () => {
if (this.actions.length >= 2 &&
this.actions[0].type !== 'CREATE_ARRAY' &&
this.actions.slice(-1)[0].type === 'DELETE_ARRAY'
) {
this.actions = this.actions.slice(-1);
}
}
mergeAllUpdate = () => {
if (this.actions.length >= 2 &&
this.actions[0].type === 'UPDATE_ARRAY' &&
this.actions.slice(-1)[0].type === 'UPDATE_ARRAY'
) {
this.actions = [this.actions.reduce((result: Object, action: ArrayAction) => {
result.payload.value = {...result.payload.value, ...action.payload.value};
return result;
})];
}
}
mergeUpdateAndCreate = () => {
if (this.actions.length >= 2 &&
this.actions[0].type === 'CREATE_ARRAY' &&
this.actions.slice(-1)[0].type === 'UPDATE_ARRAY'
) {
this.actions = [this.actions.reduce((result: Object, action: ArrayAction) => {
result.payload.value = {...result.payload.value, ...action.payload.value};
return result;
})];
}
}
addAction = (action: ArrayAction) => {
this.actions.push(action);
this.mergeAction();
}
mergeAction = (): Array<ArrayAction> => {
this.removeAllActionIfDeleteAfterCreate();
this.removeAllUpdateBeforeDelete();
this.mergeAllUpdate();
this.mergeUpdateAndCreate();
return this.actions;
}
getActions = (): Array<ArrayAction> => {
return this.actions;
}
}
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