feat: Show no internet error in search activity

app/src/main/java/org/fossasia/openevent/general/di/Modules.kt

@@ -96,7 +96,7 @@ val viewModelModule = applicationContext {
     viewModel { ProfileFragmentViewModel(get()) }
     viewModel { SignUpFragmentViewModel(get(), get()) }
     viewModel { EventDetailsViewModel(get()) }
-    viewModel { SearchViewModel(get(), get()) }
+    viewModel { SearchViewModel(get(), get(), get()) }
     viewModel { AttendeeViewModel(get(), get(), get(), get(), get(), get()) }
     viewModel { SearchLocationViewModel(get()) }
     viewModel { SearchTimeViewModel(get()) }

app/src/main/java/org/fossasia/openevent/general/search/SearchFragment.kt

@@ -10,6 +10,7 @@ import android.support.v7.widget.SearchView
 import android.text.TextUtils
 import android.view.*
 import android.widget.Toast
+import kotlinx.android.synthetic.main.fragment_search.*
 import kotlinx.android.synthetic.main.fragment_search.view.*
 import org.fossasia.openevent.general.R
 import org.fossasia.openevent.general.event.*
@@ -83,6 +84,10 @@ class SearchFragment : Fragment() {
             it?.let { Utils.showProgressBar(rootView.progressBar, it) }
         })
 
+        searchViewModel.showNoInternetError.observe(this, Observer {
+            it?.let { showNoInternetError(it) }
+        })
+
         rootView.timeTextView.setOnClickListener {
             val intent = Intent(activity, SearchTimeActivity::class.java)
             startActivity(intent)
@@ -107,6 +112,10 @@ class SearchFragment : Fragment() {
         return rootView
     }
 
+    private fun showNoInternetError(show: Boolean) {
+        errorTextView.visibility = if (show) View.VISIBLE else View.GONE
+    }
+
     override fun onOptionsItemSelected(item: MenuItem?): Boolean {
         when (item?.getItemId()) {
             R.id.search_item -> {
@@ -144,6 +153,9 @@ class SearchFragment : Fragment() {
         rootView.fabSearch.setOnClickListener {
             queryListener.onQueryTextSubmit(searchView.query.toString())
         }
+        rootView.errorTextView.setOnClickListener {
+            queryListener.onQueryTextSubmit(searchView.query.toString())
+        }
         super.onPrepareOptionsMenu(menu)
     }
 

app/src/main/java/org/fossasia/openevent/general/search/SearchViewModel.kt

@@ -6,12 +6,13 @@ import android.text.TextUtils
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.CompositeDisposable
 import io.reactivex.schedulers.Schedulers
+import org.fossasia.openevent.general.data.Network
 import org.fossasia.openevent.general.data.Preference
 import org.fossasia.openevent.general.event.Event
 import org.fossasia.openevent.general.event.EventService
 import timber.log.Timber
 
-class SearchViewModel(private val eventService: EventService, private val preference: Preference) : ViewModel() {
+class SearchViewModel(private val eventService: EventService, private val preference: Preference, private val network: Network) : ViewModel() {
 
     private val compositeDisposable = CompositeDisposable()
     private val tokenKey = "LOCATION"
@@ -21,12 +22,14 @@ class SearchViewModel(private val eventService: EventService, private val prefer
     val progress = MutableLiveData<Boolean>()
     val events = MutableLiveData<List<Event>>()
     val error = MutableLiveData<String>()
+    val showNoInternetError = MutableLiveData<Boolean>()
     var searchEvent: String? = null
     val savedLocation by lazy { preference.getString(tokenKey) }
     val savedDate by lazy { preference.getString(tokenKeyDate) }
     val savedNextDate by lazy { preference.getString(tokenKeyNextDate) }
 
     fun loadEvents(location: String, time: String) {
+        if (!isConnected()) return
         preference.putString(tokenKey, location)
         val query: String = if (TextUtils.isEmpty(location))
             "[{\"name\":\"name\",\"op\":\"ilike\",\"val\":\"%$searchEvent%\"}]"
@@ -65,6 +68,12 @@ class SearchViewModel(private val eventService: EventService, private val prefer
                 }))
     }
 
+    fun isConnected(): Boolean {
+        val isConnected = network.isNetworkConnected()
+        showNoInternetError.value = !isConnected
+        return isConnected
+    }
+
     override fun onCleared() {
         super.onCleared()
         compositeDisposable.clear()

app/src/main/res/layout/fragment_search.xml

@@ -36,6 +36,18 @@
             android:layout_height="match_parent"
             android:orientation="vertical">
 
+            <TextView
+                android:id="@+id/errorTextView"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/layout_margin_extreme_large"
+                android:gravity="center_horizontal"
+                android:text="@string/error_message"
+                android:textColor="@color/black"
+                android:textSize="@dimen/text_size_large"
+                android:textStyle="bold"
+                android:visibility="gone" />
+
             <LinearLayout
                 android:id="@+id/searchLinearLayout"
                 android:layout_width="match_parent"

app/src/main/res/values/dimens.xml

@@ -17,6 +17,7 @@
     <dimen name="layout_margin_moderate">10dp</dimen>
     <dimen name="layout_margin_large">16dp</dimen>
     <dimen name="layout_margin_extra_large">32dp</dimen>
+    <dimen name="layout_margin_extreme_large">56dp</dimen>
 
     <!-- padding specifics -->
     <dimen name="padding_extra_small">2dp</dimen>

app/src/main/res/values/strings.xml

@@ -33,6 +33,7 @@
     <string name="no_search_results">Hmmm, we\'\re not getting\nany results. Our bad - try\nanother search</string>
     <string name="event_details">Event details</string>
     <string name="see_maps">See maps</string>
+    <string name="error_message">There was an error. Tap here to try again.</string>
 
     <!--profile details-->
     <string name="user_name">Username</string>