Pinned quick pairs widget

[mdrlzy]

Continuation of #100

[hieuwu]

With this particular code block, for NextPageAction and PreviousPageAction, there's only difference in the way we find newIndex. Hence we could share the rest of the code and only . HOC is a good fit in this case.

So we can have a helper file with this function:

suspend fun updatePinnedPairsWidgetNewPageState(
    context: Context,
    glanceId: GlanceId,
    quickRepo: QuickRepo,
    findNextIndexAction: (Int, Int) -> Int,
) {
    val allGroups = quickRepo.getAllGroups()
    updateAppWidgetState(context, glanceId) { prefs ->
        val currentIndex = allGroups.indexOf(prefs[QuickPairsWidgetReceiver.currentGroupKey])
        val newIndex = findNextIndexAction(currentIndex, allGroups.lastIndex)
        val newGroup = allGroups[newIndex]
        if (newGroup != null) {
            prefs[QuickPairsWidgetReceiver.currentGroupKey] = newGroup
        } else {
            prefs.remove(QuickPairsWidgetReceiver.currentGroupKey)
        }
    }
    QuickPairsWidget().update(context, glanceId)
}

And then update code in our two classes for example:

class NextPageAction : ActionCallback {
    override suspend fun onAction(
        context: Context,
        glanceId: GlanceId,
        parameters: ActionParameters,
    ) {
        val quickRepo = DIManager.component.quickRepo()
        updatePinnedPairsWidgetNewPageState(
            context = context,
            glanceId = glanceId,
            quickRepo = quickRepo,
            findNextIndexAction = { current, last ->
                findIndex(current, last)
            },
        )
    }

    private fun findIndex(
        currentIndex: Int,
        lastIndex: Int,
    ): Int {
        var newIndex = if (currentIndex == -1) 0 else currentIndex + 1
        if (newIndex > lastIndex) {
            newIndex = 0
        }
        return newIndex
    }
}

[mdrlzy]

Replaced by #117