Dynamic Child App Pages

[FriedCheese2006]

Is there a way to dynamically define child apps in a parent based on whether or not the apps code is actually installed?

My child apps listing is a little long in the tooth. My thoughts are to make the child apps optional in HPM and only show those that are installed.

[thebearmay]

@FriedCheese2006

Is there a way to dynamically define child apps in a parent based on whether or not the apps code is actually installed?

Not a neatly packaged one but @gavincampbell posted this code (or something very close) a while back for getting installed apps.

def getAppsList() {        
	def params = [
		uri: "http://127.0.0.1:8080/app/list",
		textParser: true,
		headers: [
			Cookie: state.cookie
		]
	  ]
	
	def allAppsList = []
    def allAppNames = []
	try {
		httpGet(params) { resp ->     
			def matcherText = resp.data.text.replace("\n","").replace("\r","")
			def matcher = matcherText.findAll(/(<tr class="app-row" data-app-id="[^<>]+">.*?<\/tr>)/).each {
				def allFields = it.findAll(/(<td .*?<\/td>)/) // { match,f -> return f } 
				def id = it.find(/data-app-id="([^"]+)"/) { match,i -> return i.trim() }
				def title = allFields[0].find(/title="([^"]+)/) { match,t -> return t.trim() }
				allAppsList += [id:id,title:title]
                allAppNames << title
			}
		}
	} catch (e) {
		log.error "Error retrieving installed apps: ${e}"
        log.error(getExceptionMessageWithLine(e))
	}
    state.allAppNames = allAppNames.sort { a, b -> a.toLowerCase() <=> b.toLowerCase() }
}

Shouldn’t be too hard to point it at the apps code tab and process similarly

[FriedCheese2006]

@thebearmay ...I don't know if anyone has told you lately, but you are a gem.
@gavincampbell ...thanks for coming up with this excellent approach.

This is actually looking at the apps code list. I've never really paid attention until now, but /app/list/ is the code section and /installedapp/list/ is the normal apps page.

I did make a few tweaks as the IDE was complaining about the code as posted. I also dropped the ID portions as I don't need it for my use-case.

Revised Code

def getAppsList() {        
	def params = [
		uri: "http://127.0.0.1:8080/app/list",
		textParser: true,
		headers: [
			Cookie: state.cookie
		]
	  ]
	
	def allAppNames = []
	try {
		httpGet(params) { resp ->
			def matcherText = resp.data.text.replace("\n","").replace("\r","")
			def matcher = matcherText.findAll(/(<tr class="app-row" data-app-id="[^<>]+">.*?<\/tr>)/).each {
				def allFields = it.findAll(/(<td .*?<\/td>)/) // { match,f -> return f } 
				def title = allFields[0].find(/title="([^"]+)/) { match,t -> return t.trim() }
                allAppNames.add(title)
			}
		}
	} catch (e) {
		log.error "Error retrieving installed apps: ${e}"
        log.error(getExceptionMessageWithLine(e))
	}
    state.allAppNames = allAppNames.sort()
}

Followed by a simple IF statement in the dynamic page:

if ("Sensor Groups+_CO" in state.allAppNames) {
				app(name: "coApp+", appName: "Sensor Groups+_CO", namespace: "rle.sg+", title: "Add a new CO Sensor Group+ Instance", multiple: true)
                }

With the child app installed:

With the child app deleted:

[FriedCheese2006]

Going one step farther...I dumped my child apps into a variable and was able to whittle down generating the entire child app list.

        def childApps = ["Sensor Groups+_CO","Sensor Groups+_Contact","Sensor Groups+_Humidity","Sensor Groups+_Motion","Sensor Groups+_Smoke","Sensor Groups+_Switch","Sensor Groups+_Temp","Sensor Groups+_Water"]
		logDebug "Installed apps are ${state.allAppNames}"
		if(state.appInstalled == 'COMPLETE'){
			section("${app.label}") {
				paragraph "Provides options for combining multiple sensors into a single device to provide combined updates."
			}
			section("Child Apps") {
                childApps.each { it ->
                    if (it in state.allAppNames) {
                        app(name: it+"App+", appName: it, namespace: "rle.sg+", title: "Add a new ${it} Instance", multiple: true)
                    } else {
                    logDebug "${it} not installed."
				    }
                }
			}

[tomw]

I do it like this:

def isAppInstalled(name)
{
    def result
    
    try
    {
        def app = addChildApp("tomw", name, name)
        deleteChildApp(app.id)
        
        result = true
    }
    catch(hubitat.exception.NotFoundException e)
    {
        result = false           
    }
    finally
    {
        return result
    }
}

[FriedCheese2006]

Is that just trying to create a child app to see if HE throws and error or not (indicating whether or not the app code is installed)?

[tomw]

Yes. As long as they don't change the exception they raise, this will always work. I prefer it to string parsing the HTML page.

Here's how I use it in a dynamicPage:

if(isAppInstalled("Presence Debounce"))
                {
                    app(name: "anyOpenApp", appName: "Presence Debounce", namespace: "tomw", title: "<b>Add a new Presence Debounce instance</b>", multiple: true)
                }