src/app/customers/cases/store/tasks/tasks.reducer.ts

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import * as task from './task.actions';
import {StatusCommand} from '../model/fims-command.model';

export interface State {
  commands: StatusCommand[];
}

export const initialState: State = {
  commands: [
    { action: 'OPEN', preStates: ['CREATED'], tasks: []},
    { action: 'APPROVE', preStates: ['PENDING'], tasks: []},
    { action: 'DENY', preStates: ['PENDING'], tasks: []},
    { action: 'CLOSE', preStates: ['APPROVED', 'ACTIVE'], tasks: []},
    { action: 'DISBURSE', preStates: ['APPROVED'], tasks: []}
  ]
};

export function reducer(state = initialState, action: task.Actions): State {

  switch (action.type) {

    case task.LOAD_ALL: {
      return initialState;
    }

    case task.LOAD_ALL_COMPLETE: {
      const entities = action.payload;

      const commands = state.commands.map(command => {
        return Object.assign({}, command, {
          tasks: entities.filter(instance => instance.taskDefinition.actions.indexOf(command.action) > -1)
        });
      });

      return {
        commands
      };
    }

    case task.EXECUTE_TASK_SUCCESS: {
      const payload = action.payload;

      const commands = state.commands.map(command => {
        if (command.action !== payload.action) {
          return command;
        }

        return Object.assign({}, command, {
          tasks: command.tasks.map(task => {
            if (task.taskDefinition.identifier !== payload.taskIdentifier) {
              return task;
            }

            return Object.assign({}, task, {
              executedOn: payload.executed ? new Date().toISOString() : undefined,
              executedBy: payload.executedBy
            });
          })
        });
      });

      return {
        commands
      };
    }

    default: {
      return state;
    }
  }
}

export const getCommands = (state: State) => state.commands;