10: Create UsesSdkPlugin

src/main/java/com/bartek/esa/core/di/PluginModule.java

@@ -63,4 +63,10 @@ public class PluginModule {
     public Plugin sharedUidPlugin(GlobMatcher globMatcher, XmlHelper xmlHelper) {
         return new SharedUidPlugin(globMatcher, xmlHelper);
     }
+
+    @Provides
+    @IntoSet
+    public Plugin usesSdkPlugin(GlobMatcher globMatcher, XmlHelper xmlHelper) {
+        return new UsesSdkPlugin(globMatcher, xmlHelper);
+    }
 }

src/main/java/com/bartek/esa/core/plugin/UsesSdkPlugin.java

@@ -0,0 +1,29 @@
+package com.bartek.esa.core.plugin;
+
+import com.bartek.esa.core.archetype.AndroidManifestPlugin;
+import com.bartek.esa.core.model.enumeration.Severity;
+import com.bartek.esa.core.xml.XmlHelper;
+import com.bartek.esa.file.matcher.GlobMatcher;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+
+import javax.inject.Inject;
+import javax.xml.xpath.XPathConstants;
+import java.util.Optional;
+
+public class UsesSdkPlugin extends AndroidManifestPlugin {
+
+    @Inject
+    public UsesSdkPlugin(GlobMatcher globMatcher, XmlHelper xmlHelper) {
+        super(globMatcher, xmlHelper);
+    }
+
+    @Override
+    protected void run(Document xml) {
+        Optional.ofNullable((Node) xPath(xml, "/manifest/uses-sdk", XPathConstants.NODE)).ifPresentOrElse(usesSdkNode -> {
+            if(usesSdkNode.getAttributes().getNamedItem("android:minSdkVersion") == null) {
+                addIssue(Severity.ERROR, ".USES_SDK.NO_MIN_SDK_VERSION", null, null);
+            }
+        }, () -> addIssue(Severity.ERROR, ".NO_USES_SDK", null, null));
+    }
+}

src/main/resources/description.properties

@@ -50,4 +50,17 @@ com.bartek.esa.core.plugin.ImplicitIntentsPlugin.PENDING_INTENT=Creating pending
 com.bartek.esa.core.plugin.SharedUidPlugin=Making use of shared UserID.\n\
   Shared UserID violates a sandbox nature of Android system. All applications working with the same UID work also \n\
   within the same process and share granted permissions, resources and so on.\n\
-  Remember, that if you really want to use this feature, after publishing your app, you won't be able to change it anymore.
+  Remember, that if you really want to use this feature, after publishing your app, you won't be able to change it anymore.
+
+com.bartek.esa.core.plugin.UsesSdkPlugin.NO_USES_SDK=There is no <uses-sdk> defined in AndroidManifest.xml file.\n\
+  In order to use this tool, <uses-sdk> should be defined in AndroidManifest.xml with android:minSdkVersion attribute at least.\n\
+  This element should be placed below the root (<manifest>) level.\n\
+  For example:\n\
+  <manifest>\n\
+  \t<uses-sdk android:minSdkVersion="23">\n\
+  \t...\n\
+  </manifest>
+
+com.bartek.esa.core.plugin.UsesSdkPlugin.USES_SDK.NO_MIN_SDK_VERSION=There is no minSdkVersion defined in AndroidManifest.xml file.\n\
+  In order to use this tool, minimal SDK version should be provided as the attribute of <uses-sdk> element.\n\
+  For example: <uses-sdk android:minSdkVersion="23">