Sequences

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Sequences
Sequences are the core concept of Map the Paths.
Overview
Generally speaking a sequence moves through 3 stages:
​Create: user selects details/files for sequence
​Upload: user files uploaded
​Process: user files processed into expected app format and stored in DB
View: user can view/explore their own/other users content
Publish: user shares to other services (e.g. Google Street View)
Sequence states
At a high level the sequence goes through the following steps
id
Sequence State
Description
Relevant docs
seq-state-01
Initiated
User has created the Sequence metadata in UI
​Create​
seq-state-02
Client side check in progress
As user hits upload, a series of client side checks are performed to ensure the content meets what is expected.
​Create​
seq-state-03
Client side check failed
One or more of the client side checks on images/video has failed.
​Create​
seq-state-04
Upload in progress
If client side check completed successfully upload starts. At this stage a sequences is only temporary as the file(s) are uploaded to S3
​Upload​
seq-state-05
Upload successful
All images/video part expected have been successfully uploaded to S3.
​Upload​
seq-state-06
Upload failed
This occurs if final upload count does not equal calculated upload count. It can happen if a user abandons sequence creation or there are network connectivity issues. The content from these partially uploaded sequences will be automatically deleted within 2 hours (from S3), but DB record will remain to advise user.
​Upload​
seq-state-07
Upload processing
Once upload is successful sequence enters processing state (may not be immediate as queuing can occur), during which time a number of actions are performed on the files described in the processing steps.
​Process​
seq-state-08
Upload processing failed
If an error occurs during processing, sequence enters this state
​Process​
seq-state-09
Upload processed
When processing is complete, the sequence enters upload complete and now a user is free to make modifications to content in the UI.
​Process​
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Process
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Overview
Sequence states