@wordpress/upload-media/build-module/store/reducer.js

Core media upload logic.

/**
 * Internal dependencies
 */
import { Type } from './types';
const noop = () => {};
const DEFAULT_STATE = {
  queue: [],
  queueStatus: 'active',
  blobUrls: {},
  settings: {
    mediaUpload: noop
  }
};
function reducer(state = DEFAULT_STATE, action = {
  type: Type.Unknown
}) {
  switch (action.type) {
    case Type.PauseQueue:
      {
        return {
          ...state,
          queueStatus: 'paused'
        };
      }
    case Type.ResumeQueue:
      {
        return {
          ...state,
          queueStatus: 'active'
        };
      }
    case Type.Add:
      return {
        ...state,
        queue: [...state.queue, action.item]
      };
    case Type.Cancel:
      return {
        ...state,
        queue: state.queue.map(item => item.id === action.id ? {
          ...item,
          error: action.error
        } : item)
      };
    case Type.Remove:
      return {
        ...state,
        queue: state.queue.filter(item => item.id !== action.id)
      };
    case Type.OperationStart:
      {
        return {
          ...state,
          queue: state.queue.map(item => item.id === action.id ? {
            ...item,
            currentOperation: action.operation
          } : item)
        };
      }
    case Type.AddOperations:
      return {
        ...state,
        queue: state.queue.map(item => {
          if (item.id !== action.id) {
            return item;
          }
          return {
            ...item,
            operations: [...(item.operations || []), ...action.operations]
          };
        })
      };
    case Type.OperationFinish:
      return {
        ...state,
        queue: state.queue.map(item => {
          if (item.id !== action.id) {
            return item;
          }
          const operations = item.operations ? item.operations.slice(1) : [];

          // Prevent an empty object if there's no attachment data.
          const attachment = item.attachment || action.item.attachment ? {
            ...item.attachment,
            ...action.item.attachment
          } : undefined;
          return {
            ...item,
            currentOperation: undefined,
            operations,
            ...action.item,
            attachment,
            additionalData: {
              ...item.additionalData,
              ...action.item.additionalData
            }
          };
        })
      };
    case Type.CacheBlobUrl:
      {
        const blobUrls = state.blobUrls[action.id] || [];
        return {
          ...state,
          blobUrls: {
            ...state.blobUrls,
            [action.id]: [...blobUrls, action.blobUrl]
          }
        };
      }
    case Type.RevokeBlobUrls:
      {
        const newBlobUrls = {
          ...state.blobUrls
        };
        delete newBlobUrls[action.id];
        return {
          ...state,
          blobUrls: newBlobUrls
        };
      }
    case Type.UpdateSettings:
      {
        return {
          ...state,
          settings: {
            ...state.settings,
            ...action.settings
          }
        };
      }
  }
  return state;
}
export default reducer;
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