Problem: Tagging too many files makes the Appraisal tab to crash

Expected behaviour

The Add tag to selected files button of the Backlog pane works with any number of selected files.

Current behaviour

Doing the load testing described in https://github.com/archivematica/Issues/issues/549 we found that attempting to tag too many selected files crashes the browser.

Currently this is what's happening:

The JS code of the button sends an individual PUT request to the TransferFileTags view for each selected file
The TransferFileTags view then calls an elasticSearch helper function to set the tags using the file's uuid
The elasticSearch helper function first validates the file's uuid by doing a GET request to ElasticSearch. If the validation passes the document containing the tags is updated through an additional POST request.

This might be improved by using the Bulk API in ElasticSearch.

Some noticeable slowness happens when the user clicks and types in the input form field to enter the tag. This may be caused by the Angular model attached to the input field. This model might be unnecessary because its value is only used when the user clicks the Add tag to selected files button and it's reset after the tag has been applied to the files.

Steps to reproduce

Explained in https://github.com/archivematica/Issues/issues/549

Your environment (version of Archivematica, OS version, etc) https://github.com/artefactual-labs/am/commit/1ef43a43ddf21268ccbb223f7ad43025f485875b

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All PRs related to this issue are properly linked 👍
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archivematica / Issues

Problem: Tagging too many files makes the Appraisal tab to crash #615