Path utility class implementation (#9)

* Paths utility class implementation
* Updated buildozer requirements list
* lbry repository in buildozer.spec requirements changed to https://github.com/lbryio/lbry

buildozer.spec.sample

@@ -36,7 +36,7 @@ version = 0.1
 
 # (list) Application requirements
 # comma seperated e.g. requirements = sqlite3,kivy
-requirements = openssl, sqlite3, hostpython2, pycrypto==2.6.1, android, pyjnius, constantly, incremental, functools32, miniupnpc==1.9, gmpy==1.17, twisted==16.6.0, appdirs==1.4.3, argparse==1.2.1, docopt==0.6.2, base58==0.2.2, colorama==0.3.7, dnspython==1.12.0, ecdsa==0.13, envparse==0.2.0, jsonrpc==1.2, jsonrpclib==0.1.7, jsonschema==2.5.1, pbkdf2==1.3, pycrypto==2.6.1, pyyaml==3.12, qrcode==5.2.2, requests==2.9.1, txrequests==0.9.5, seccure==0.3.1.3, service_identity==16.0.0, six==1.9.0, slowaes==0.1a1, txJSON-RPC==0.5, wsgiref==0.1.2, zope.interface==4.3.3, protobuf==3.2.0, git+https://github.com/lbryio/lbryschema.git#egg=lbryschema, git+https://github.com/lbryio/lbryum.git#egg=lbryum, git+https://github.com/akinwale/lbry.git#egg=lbry
+requirements = openssl, sqlite3, hostpython2, pycrypto==2.6.1, android, pyjnius, constantly, incremental, functools32, miniupnpc==1.9, gmpy==1.17, twisted==16.6.0, appdirs==1.4.3, argparse==1.2.1, docopt==0.6.2, base58==0.2.2, colorama==0.3.7, dnspython==1.12.0, ecdsa==0.13, envparse==0.2.0, jsonrpc==1.2, jsonrpclib==0.1.7, jsonschema==2.5.1, pbkdf2==1.3, pycrypto==2.6.1, pyyaml==3.12, qrcode==5.2.2, requests==2.9.1, txrequests==0.9.5, seccure==0.3.1.3, service_identity==16.0.0, six==1.9.0, slowaes==0.1a1, txJSON-RPC==0.5, wsgiref==0.1.2, zope.interface==4.3.3, protobuf==3.2.0, git+https://github.com/lbryio/lbryschema.git#egg=lbryschema, git+https://github.com/lbryio/lbryum.git#egg=lbryum, git+https://github.com/lbryio/lbry.git#egg=lbry
 
 # (str) Custom source folders for requirements
 # Sets custom source for any requirements with recipes

buildozer.spec.travis

@@ -36,7 +36,7 @@ version = 0.1
 
 # (list) Application requirements
 # comma seperated e.g. requirements = sqlite3,kivy
-requirements = openssl, sqlite3, hostpython2, pycrypto==2.6.1, android, pyjnius, constantly, incremental, functools32, miniupnpc==1.9, gmpy==1.17, twisted==16.6.0, appdirs==1.4.3, argparse==1.2.1, docopt==0.6.2, base58==0.2.2, colorama==0.3.7, dnspython==1.12.0, ecdsa==0.13, envparse==0.2.0, jsonrpc==1.2, jsonrpclib==0.1.7, jsonschema==2.5.1, pbkdf2==1.3, pycrypto==2.6.1, pyyaml==3.12, qrcode==5.2.2, requests==2.9.1, txrequests==0.9.5, seccure==0.3.1.3, service_identity==16.0.0, six==1.9.0, slowaes==0.1a1, txJSON-RPC==0.5, wsgiref==0.1.2, zope.interface==4.3.3, protobuf==3.2.0, git+https://github.com/lbryio/lbryschema.git#egg=lbryschema, git+https://github.com/lbryio/lbryum.git#egg=lbryum, git+https://github.com/akinwale/lbry.git#egg=lbry
+requirements = openssl, sqlite3, hostpython2, pycrypto==2.6.1, android, pyjnius, constantly, incremental, functools32, miniupnpc==1.9, gmpy==1.17, twisted==16.6.0, appdirs==1.4.3, argparse==1.2.1, docopt==0.6.2, base58==0.2.2, colorama==0.3.7, dnspython==1.12.0, ecdsa==0.13, envparse==0.2.0, jsonrpc==1.2, jsonrpclib==0.1.7, jsonschema==2.5.1, pbkdf2==1.3, pycrypto==2.6.1, pyyaml==3.12, qrcode==5.2.2, requests==2.9.1, txrequests==0.9.5, seccure==0.3.1.3, service_identity==16.0.0, six==1.9.0, slowaes==0.1a1, txJSON-RPC==0.5, wsgiref==0.1.2, zope.interface==4.3.3, protobuf==3.2.0, git+https://github.com/lbryio/lbryschema.git#egg=lbryschema, git+https://github.com/lbryio/lbryum.git#egg=lbryum, git+https://github.com/lbryio/lbry.git#egg=lbry
 
 # (str) Custom source folders for requirements
 # Sets custom source for any requirements with recipes

src/main/java/io/lbry/lbrynet/LbrynetService.java

@@ -29,8 +29,23 @@ public class LbrynetService extends PythonService {
 
     public static String TAG = "LbrynetService";
 
+    public static LbrynetService serviceInstance;
+
+    @Override
+    public int startType() {
+        return START_STICKY;
+    }
+
+    @Override
+    public boolean canDisplayNotification() {
+        return false;
+    }
+
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
+        // Assign service instance
+        serviceInstance = this;
+
         // Extract files
         File app_root_file = new File(getAppRoot());
         unpackData("private", app_root_file);
@@ -43,21 +58,17 @@ public class LbrynetService extends PythonService {
     }
 
     @Override
-    public boolean canDisplayNotification() {
-        return false;
+    public void onDestroy() {
+        super.onDestroy();
+        serviceInstance = null;
     }
 
-    @Override
-    public int startType() {
-        return START_STICKY;
-    }
-
-    private String getAppRoot() {
+    public String getAppRoot() {
         String app_root = getApplicationContext().getFilesDir().getAbsolutePath() + "/app";
         return app_root;
     }
 
-    private void recursiveDelete(File f) {
+    public void recursiveDelete(File f) {
         if (f.isDirectory()) {
             for (File r : f.listFiles()) {
                 recursiveDelete(r);
@@ -66,7 +77,7 @@ public class LbrynetService extends PythonService {
         f.delete();
     }
 
-    private void unpackData(final String resource, File target) {
+    public void unpackData(final String resource, File target) {
         Log.v(TAG, "UNPACKING!!! " + resource + " " + target.getName());
 
         // The version of data in memory and on disk.

src/main/java/io/lbry/lbrynet/Utils.java

@@ -1,5 +1,8 @@
 package io.lbry.lbrynet;
 
+import android.content.Context;
+import java.io.File;
+
 public final class Utils {
     public static String getAndroidRelease() {
         return android.os.Build.VERSION.RELEASE;
@@ -8,4 +11,48 @@ public final class Utils {
     public static int getAndroidSdk() {
         return android.os.Build.VERSION.SDK_INT;
     }
+
+    public static String getFilesDir(Context context) {
+        return context.getFilesDir().getAbsolutePath();
+    }
+
+    public static String getAppInternalStorageDir(Context context) {
+        File[] dirs = context.getExternalFilesDirs(null);
+        return dirs[0].getAbsolutePath();
+    }
+
+    public static String getAppExternalStorageDir(Context context) {
+        File[] dirs = context.getExternalFilesDirs(null);
+        if (dirs.length > 1) {
+            return dirs[1].getAbsolutePath();
+        }
+        return null;
+    }
+
+    public static String getInternalStorageDir(Context context) {
+        String appInternal = getAppInternalStorageDir(context);
+        return writableRootForPath(appInternal);
+    }
+
+    public static String getExternalStorageDir(Context context) {
+        String appExternal = getAppInternalStorageDir(context);
+        if (appExternal == null) {
+            return null;
+        }
+
+        return writableRootForPath(appExternal);
+    }
+
+    public static String writableRootForPath(String path) {
+        File file = new File(path);
+        while (file != null && file.canWrite()) {
+            File parent = file.getParentFile();
+            if (parent != null && !parent.canWrite()) {
+                break;
+            }
+            file = parent;
+        }
+
+        return file.getAbsolutePath();
+    }
 }

src/main/python/lbrynetservice.py

@@ -1,8 +1,23 @@
 import platform
+import ssl
+
+# Fixes / patches / overrides
+# platform.platform() in libc_ver: IOError: [Errno 21] Is a directory
+from jnius import autoclass
+lbrynet_utils = autoclass('io.lbry.lbrynet.Utils')
+service = autoclass('io.lbry.lbrynet.LbrynetService').serviceInstance
+platform.platform = lambda: 'Android %s (API %s)' % (lbrynet_utils.getAndroidRelease(), lbrynet_utils.getAndroidSdk())
+
+import lbrynet.androidhelpers
+lbrynet.androidhelpers.paths.android_files_dir = lambda: lbrynet_utils.getFilesDir(service.getApplicationContext())
+lbrynet.androidhelpers.paths.android_internal_storage_dir = lambda: lbrynet_utils.getInternalStorageDir(service.getApplicationContext())
+lbrynet.androidhelpers.paths.android_external_storage_dir = lambda: lbrynet_utils.getExternalStorageDir(service.getApplicationContext())
+lbrynet.androidhelpers.paths.android_app_internal_storage_dir = lambda: lbrynet_utils.getAppInternalStorageDir(service.getApplicationContext())
+lbrynet.androidhelpers.paths.android_app_external_storage_dir = lambda: lbrynet_utils.getAppExternalStorageDir(service.getApplicationContext())
 
 import logging.handlers
-from lbrynet.core import log_support
 
+from lbrynet.core import log_support
 from twisted.internet import defer, reactor
 from jsonrpc.proxy import JSONRPCProxy
 
@@ -12,14 +27,6 @@ from lbrynet.core import utils, system_info
 from lbrynet.daemon.auth.client import LBRYAPIClient
 from lbrynet.daemon.DaemonServer import DaemonServer
 
-import ssl
-
-# Fixes / patches / overrides
-# platform.platform() in libc_ver: IOError: [Errno 21] Is a directory
-from jnius import autoclass
-util = autoclass('io.lbry.lbrynet.Utils')
-platform.platform = lambda: 'Android %s (API %s)' % (util.getAndroidRelease(), util.getAndroidSdk())
-
 # https certificate verification
 # TODO: this is bad. Need to find a way to properly verify https requests
 def https_context():
@@ -47,7 +54,6 @@ def https_context():
     requests.Session.request = partialmethod(default_request, verify=False)
     '''
 
-
 # LBRY Daemon
 log = logging.getLogger(__name__)
 
@@ -89,5 +95,6 @@ def start_server_and_listen(use_auth, analytics_manager, max_tries=5):
         analytics_manager.send_server_startup_error(str(e))
         reactor.fireSystemEvent("shutdown")
 
+
 if __name__ == '__main__':
     start()