CHT Dataflow diagrams

diagrams.md

Dataflow without cht-datasource

flowchart TD
subgraph webapp
  webapp/online[/Online User\]
  webapp/offline[/Offline User\]
  webapp/cht-datasource/offline/pouch[PouchDB]
end
subgraph api
  replication{Replication}
  api/router(( ))
end
couchdb[(CouchDB)]
replication -->|POST medic/_bulk_get| couchdb
webapp/offline --> webapp/cht-datasource/offline/pouch -->|/api/replication| replication
webapp/online --> webapp/cht-datasource/offline/pouch -->|GET <_id>| api/router
api/router --> |GET <_id>| couchdb

Loading

Dataflow with cht-datasource

flowchart TD
subgraph webapp
  webapp/online[/Online User\]
  webapp/offline[/Offline User\]

  subgraph webapp/cht-datasource[cht-datasource]
    webapp/cht-datasource/online/fetch[fetch]
    webapp/cht-datasource/offline/pouch[PouchDB]
  end
end
subgraph api
  subgraph api/cht-datasource[cht-datasource]
    api/cht-datasource/pouch[PouchDB]
  end
  replication{Replication}
end
couchdb[(CouchDB)]
api/cht-datasource/pouch -->|GET medic/<_id>| couchdb
webapp/offline --> webapp/cht-datasource/offline/pouch -->|/api/replication| replication
webapp/online --> webapp/cht-datasource/online/fetch -->|GET api/v1/person| api/cht-datasource
replication --> |POST medic/_bulk_get| couchdb

Loading

Replication algorithm (simplified)

%%{init: {'theme': 'dark' } }%%
sequenceDiagram
    participant webapp
    participant api
    participant couchdb

    webapp ->>api: GET api/replicaiton/get-ids
    api ->>couchdb: Query view <br />medic/docs_by_replication_key
    couchdb ->>api: Returns docs for users hierarchy/shortcode
    api ->>api: Filter our purged docs
    api ->>webapp: Returns list of all doc ids/revs <br />accessible to the user
    webapp ->>webapp: Compares with ids of all local docs
    webapp ->>couchdb: POST medic/_bulk_get <br />(with the missing ids)
    couchdb ->> webapp: Returns requested docs
    webapp ->>api: POST api/v1/replication/get-deletes <br />(with local ids not returned from get-ids)
    api <<->> couchdb: Uses allDocs to check deleted status
    api ->>webapp: Returns list of docs to be deleted
    webapp ->>webapp: Deletes docs

Loading