huridocs/uwazi

/* eslint-disable max-statements */
import { isString } from 'lodash';
import uniqueID from 'shared/uniqueID';

const prepareFiles = async (mediaProperties, values) => {
  const metadataFiles = {};
  const entityAttachments = [];
  const files = [];

  if (values.metadata || mediaProperties.length === 0) {
    await Promise.all(
      mediaProperties.map(async p => {
        if (!values.metadata[p.name] || /^https?:\/\//.test(values.metadata[p.name])) {
          return Promise.resolve();
        }
        const { data, originalFile } = values.metadata[p.name];
        if (originalFile) {
          const validBlobUrlRegExp =
            /^\(?(blob:https?:\/\/(?:www\.)?[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|])(, ({.+}))?/;

          const [, url, , timeLinks] = data.match(validBlobUrlRegExp) || ['', data];
          const blob = await fetch(url).then(r => r.blob());
          const file = new File([blob], originalFile.name, { type: blob.type });
          const fileID = uniqueID();

          metadataFiles[p.name] = fileID;

          entityAttachments.push({
            originalname: file.name,
            filename: file.name,
            type: 'attachment',
            mimetype: blob.type,
            fileLocalID: fileID,
            timeLinks,
          });

          files.push(file);

          return URL.revokeObjectURL(values.metadata[p.name]);
        }
      })
    );
  }

  return { metadataFiles, entityAttachments, files };
};

function wrapEntityMetadata(entity, template) {
  const mediaProperties =
    template.properties?.filter(prop => prop.type === 'image' || prop.type === 'media') || [];

  if (!entity.metadata) {
    return { ...entity };
  }
  const newFileMetadataValues = (entity.attachments || [])
    .filter(attachment => attachment.fileLocalID)
    .reduce(
      (previousValue, attachment, index) => ({
        ...previousValue,
        [attachment.fileLocalID]: { value: '', attachment: index, timeLinks: attachment.timeLinks },
      }),
      {}
    );

  const metadata = Object.keys(entity.metadata).reduce((wrappedMo, key) => {
    let fileLocalID;
    let timeLinks;
    const property = mediaProperties.find(p => p.name === key);
    if (property && entity.metadata[key]) {
      const fieldValue = entity.metadata[key].data || entity.metadata[key];
      const mediaExpGroups = fieldValue.match(/^\(?([\w+]{10,15})(, ({.+})\))?|$/);
      if (isString(fieldValue) && mediaExpGroups && mediaExpGroups[1]) {
        [, fileLocalID, , timeLinks] = mediaExpGroups || ['', fieldValue];
      }
      if (fileLocalID && fileLocalID.length < 20 && timeLinks) {
        newFileMetadataValues[fileLocalID] = { ...newFileMetadataValues[fileLocalID], timeLinks };
      }
    }
    const newFileMetadataValue = newFileMetadataValues[fileLocalID] || fileLocalID;
    return {
      ...wrappedMo,
      [key]: Array.isArray(entity.metadata[key])
        ? entity.metadata[key].map(v => ({ value: v }))
        : [newFileMetadataValue || { value: entity.metadata[key]?.data || entity.metadata[key] }],
    };
  }, {});
  // suggestedMetadata is always in metadata-object form.
  return { ...entity, metadata };
}

const prepareMetadataAndFiles = async (values, attachedFiles, template) => {
  const mediaProperties = template.properties.filter(p => p.type === 'image' || p.type === 'media');
  const { metadataFiles, entityAttachments, files } = await prepareFiles(mediaProperties, values);
  const fields = { ...values.metadata, ...metadataFiles };
  const entity = { ...values, metadata: fields, attachments: entityAttachments };
  const wrappedEntity = wrapEntityMetadata(entity, template);
  wrappedEntity.file = values.file ? values.file[0] : undefined;
  wrappedEntity.attachments = [];
  wrappedEntity.attachments.push(...files);
  wrappedEntity.attachments.push(...attachedFiles);
  return { ...wrappedEntity, template: template._id };
};

export { prepareMetadataAndFiles, wrapEntityMetadata };