This document summarizes Marc-André Lépine's presentation on using PowerApps custom connectors and JSON. The presentation covers: 1) enhancing an existing StaffHub scheduling application with PowerApps; 2) using a calendar gallery control to display schedules; and 3) building a custom connector to interface with the StaffHub API and generate JSON messages from PowerApps to send to other applications like Flow. Practical applications discussed include exporting data to CSV, looping emails, and using Flow/SQL as "workhorses" to handle multiple calls or writes.

1. My Kung Fu
A journey into PowerApps Custom Connectors and JSON

2. Marc-André Lépine
Solutions Architect (O365)
Hôpital Montfort, Ottawa, Canada

3. Disclaimer
• I don’t « really » do Kung-Fu;
• I didn’t come up with most of this Kung-Fu;
• A big shout out to the StaffHub team;
• A big shout out to the PowerApps team for //comments

4. Today’s Menu
• Part 1
• StaffHub – Shift Planning
• Calendar Gallery Control
• A few recycled tips & tricks
• Custom StaffHub Connector (API)
• Part 2
• PowerApps – Generating JSON messages
• The moving parts
• The Afternoon Tea Edition
• The Single Malt Scotch Edition
• Practical Applications

5. Building on StaffHub
Using PowerApps to enhance existing Office 365 Applications

6. Some context
StaffHub – Physician, Resident, and Student scheduling

7. Planning Viewing

8. A little Demo
Kung Fu Show and Tell

9. The Ins and Outs - Calendar Control
• https://blogs.msdn.microsoft.com/da
vidni/2016/12/13/building-an-
interactive-calendar-view-with-
powerapps/
• Excellent blog post;
• Many practical applications;

10. Schedule Planning
Calendar
Gallery

11. Kung Fu
• For visibility or « select »

12. Keep it all it one place - Single screen
• Use Grouped Controls to facilitate screen management;
• Use a single screen to facilitate variable

13. Custom connector
• StaffHub API (with approval – must be activated for your tenant)
• JSON Swagger (provided by Microsoft – thanks!)
• Building a Custom Connector via Flow / PA GUI

14. Process
Register
Application
Delegated
Permissions
Create Custom
Connector
Share!

18. A little twist here...
• We had to « tweak » certain Redirect URLs in the application to get them to
function with PowerApps / Flow

24. PowerApps – Generating JSON
Using PowerApps generate and send JSON messages

25. A little mo’ Demo
A simple set-up

26. Generating JSON
Collect into
Collection
Build JSON
message
Send as single
table / command
/ entity

27. The « Kung-Fu »
ForAll(MyCollection,
Collect(JsonMsg,
{JsonLine:
"{"&
Char(34)&« COLLECTION COLUMN NAME "&Char(34)&":"&Char(34)& VALUE &Char(34)
&","&
Char(34)&" COLLECTION COLUMN NAME "&Char(34)&":"&Char(34)& VALUE &Char(34)
&"}"
} )
)

28. Afternoon Tea Edition
PowerApps JSON
Flow
(iterate)

29. Single Malt Scotch Edition
PowerApps JSON (source)
Flow
(On Create)

30. Practical applications
• Export to CSV;
• Loop email from different account;
• Limiting the number of calls;
• Making « Flow » the Workhorse
• Making « SQL » the Workhorse
• « Enhanced Priviledge »

31. Single-Malt Scotch Edition
PowerApps JSON
Flow
(iterate)
SQL
(write)

32. Double-Malt Scotch Edition
PowerApps JSON
Flow
(write JSON)
SQL
(iterate)