Headless Task Function Specifications

[a-k-o-r-e-d-e]

Is your feature request related to a problem? Please describe.
When Initialising the headless function we pass our implementation of the headless function.

While the Documentation clearly shows that we need a function that takes a single HeadlessTask data type.
The "registerHeadlessTask(Function callback)" implementation Just accepts a Function callback, meaning one could mistakenly pass it a Function (String taskId) or Function (int taskId) and the compiler won't raise an issue. This is a mistake I made and I spent a significant amount of time trying to figure out why my headless tasks were not firing but the background tasks were being called when the app is in the foreground.

I admit this was my mistake and could have been prevented if I followed the documentation to the letter but I suggest that the Implementation be tightened so as to prevent others from having such errors.

Describe the solution you'd like
Change the declaration of "BackgroundFetch.registerHeadlessTask(Function callback)" to something like "BackgroundFetch.registerHeadlessTask(Function(HeadlessTask) callback)" hence the compiler would flag it if one passes the wrong fucntion type.

** Edit
While at we could also improve the BackgroundFetch.configure parameter "onFetch" Function declaration from "Function onFetch" to "Function(String taskId) onFetch".
I also suggest the same for the "onTimeout" parameter

[christocracy]

Why not make a pull-request?

[a-k-o-r-e-d-e]

Okay, Gimme a moment.

• Edit
  Done, please check out PR Function Type Specification for Headless Tasks, onFetch and onTimeout #228 . Thank you.

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[stale]

Closing this issue after a prolonged period of inactivity. Fell free to reopen this issue, if this still affecting you.