persist trajectories in sqlite

this is work in progress. i'm not happy with this:
- the sqlite binding is incredibly slow for some reason.
- we don't have spatial operators (can't offload inference work to DB)
- we drop support for browsers (need a fallback)

spatial queries could be enabled by forking the plugin and using a
custom spatialite binding instead of sqlcipher, though thats gonna
be quite some effort.

android/app/capacitor.build.gradle

@@ -9,7 +9,7 @@ android {
 
 apply from: "../capacitor-cordova-android-plugins/cordova.variables.gradle"
 dependencies {
-
+    implementation project(':capacitor-community-sqlite')
     implementation "com.google.android.gms:play-services-location:11+"
     implementation "com.android.support:support-v4:26+"
     implementation "com.android.support:appcompat-v7:26+"

android/app/src/main/AndroidManifest.xml

@@ -44,12 +44,14 @@
 
     <!-- Permissions -->
 
+    <!-- fetch basemap tiles -->
     <uses-permission android:name="android.permission.INTERNET" />
-    <!-- Camera, Photos, input file -->
+    <!-- read: import trajectories. write: store sqlite DB -->
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     <!-- Geolocation API -->
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
-   <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
     <uses-feature android:name="android.hardware.location.gps" />
 </manifest>

android/app/src/main/java/de/ifgi/simport/learning/MainActivity.java

@@ -4,6 +4,7 @@
 
 import com.getcapacitor.BridgeActivity;
 import com.getcapacitor.Plugin;
+import com.getcapacitor.community.database.sqlite.CapacitorSQLite;
 
 import java.util.ArrayList;
 
@@ -16,6 +17,7 @@ public void onCreate(Bundle savedInstanceState) {
     this.init(savedInstanceState, new ArrayList<Class<? extends Plugin>>() {{
       // Additional plugins you've installed go here
       // Ex: add(TotallyAwesomePlugin.class);
+      add(CapacitorSQLite.class);
     }});
   }
 }

android/capacitor.settings.gradle

@@ -1,3 +1,6 @@
 // DO NOT EDIT THIS FILE! IT IS GENERATED EACH TIME "capacitor update" IS RUN
 include ':capacitor-android'
 project(':capacitor-android').projectDir = new File('../node_modules/@capacitor/android/capacitor')
+
+include ':capacitor-community-sqlite'
+project(':capacitor-community-sqlite').projectDir = new File('../node_modules/@capacitor-community/sqlite/android')

ios/App/Podfile

@@ -10,6 +10,7 @@ def capacitor_pods
   # Automatic Capacitor Pod dependencies, do not delete
   pod 'Capacitor', :path => '../../node_modules/@capacitor/ios'
   pod 'CapacitorCordova', :path => '../../node_modules/@capacitor/ios'
+  pod 'CapacitorCommunitySqlite', :path => '../../node_modules/@capacitor-community/sqlite'
   pod 'CordovaPlugins', :path => '../capacitor-cordova-ios-plugins'
   # Do not delete
 end