Initial application logic

.github/workflows/ci.yaml

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+name: CI
+on: { pull_request: { } }
+concurrency:
+  group: ${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Setup Java
+        uses: actions/setup-java@v5
+        with:
+            distribution: temurin
+            java-version: 17
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Build apk
+        run: |
+          ./gradlew assembleRelease
+
+      - name: Build aab
+        run: |
+          ./gradlew bundleRelease
+
+      - name: Upload apk
+        uses: actions/upload-artifact@v4
+        with:
+            name: message-decoder.apk
+            path: ./app/build/outputs/apk/*/*.apk
+            retention-days: 7
+
+      - name: Upload bundle
+        uses: actions/upload-artifact@v4
+        with:
+            name: message-decoder.aab
+            path: ./app/build/outputs/bundle/*/*.aab
+            retention-days: 7

.github/workflows/release.yaml

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+name: Release
+on: { push: { branches: [ main ], tags: [ 'v*' ] } }
+concurrency:
+  group: ${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+permissions:
+  contents: write
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Setup Java
+        uses: actions/setup-java@v5
+        with:
+            distribution: temurin
+            java-version: 17
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Setup android keystore
+        run: |
+          base64 -d <<<'${{ secrets.ANDROID_SIGNING_KEY_STORE }}' > android.jks
+          echo "ANDROID_KEYSTORE_PATH=$GITHUB_WORKSPACE/android.jks" >> $GITHUB_ENV
+          # Once the path is set, we need to be able to load it
+          echo "ANDROID_KEYSTORE_PASSWORD=${{ secrets.ANDROID_SIGNING_KEY_PASSWORD }}" >> $GITHUB_ENV
+          echo "ANDROID_KEYSTORE_KEY_NAME=Github CI" >> $GITHUB_ENV
+          echo "ANDROID_KEYSTORE_KEY_PASSWORD=${{ secrets.ANDROID_SIGNING_KEY_PASSWORD }}" >> $GITHUB_ENV
+
+      - name: Update version code
+        run: |
+          ./gradlew increaseVersionCode
+
+          git config user.email "ci-update-version-code[bot]@users.noreply.github.com"
+          git config user.name "ci-update-version-code[bot]"
+
+          git add version.properties
+          git commit -m 'Increase version code'
+
+          git push origin ${{ github.ref }}
+        if: "!startsWith(github.ref, 'refs/tags/')"
+
+      - name: Update version.properties for release
+        run: |
+          sed -i 's/VERSION_NAME=.*/VERSION_NAME='${GITHUB_REF##*/}'/g' version.properties
+          sed -i 's/VERSION_CODE=.*/VERSION_CODE=1/g' version.properties
+        if: "startsWith(github.ref, 'refs/tags/')"
+
+
+      - name: Build apk
+        run: |
+          ./gradlew assembleRelease
+
+      - name: Build aab
+        run: |
+          ./gradlew bundleRelease
+
+      - name: Publish beta release
+        run: |
+          ./gradlew publishReleaseBundle --track 'internal' --release-name '${{ github.sha }}'
+        env:
+          ANDROID_PUBLISHER_CREDENTIALS: '${{ secrets.ANDROID_PUBLISHER_CREDENTIALS }}'
+        if: "!startsWith(github.ref, 'refs/tags/')"
+
+      - name: Publish named release
+        run: |
+          ./gradlew publishReleaseBundle --track 'production' --release-name "${GITHUB_REF##*/}"
+        env:
+          ANDROID_PUBLISHER_CREDENTIALS: '${{ secrets.ANDROID_PUBLISHER_CREDENTIALS }}'
+        if: "startsWith(github.ref, 'refs/tags/')"

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

LICENSE

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+MIT License
+
+Copyright (c) 2025 Sailing with Damian
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,2 +1,9 @@
-# message-decoder
-Message decoder for InReach Proxy
+# Message Decoder
+
+This project supports decoding of multi-part messages sent via inreach-proxy.
+
+Expected input format:
+`m:grib:1:2:Awetwet==`
+`m:grib:2:2:Awetwet==`
+
+Output: `GRIB` file saved to storage.

app/.gitignore

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+/build

app/build.gradle.kts

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+import java.io.FileInputStream
+import java.util.Properties
+
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.compose)
+    id("com.github.triplet.play") version "3.12.1"
+}
+
+val versionProperties = Properties().apply {
+    load(FileInputStream(rootProject.file("version.properties")))
+}
+
+val signingKeystorePath = file(System.getenv("ANDROID_KEYSTORE_PATH") ?: "keystore.jks")
+
+android {
+    namespace = "eu.sailwithdamian.message_decoder"
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "eu.sailwithdamian.MessageDecoder"
+        minSdk = 33
+        targetSdk = 35
+        versionCode = versionProperties["VERSION_CODE"].toString().toInt()
+        versionName = versionProperties["VERSION_NAME"].toString()
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+    signingConfigs {
+        if (signingKeystorePath.exists()) {
+            create("release") {
+                storeFile = signingKeystorePath
+                storePassword = System.getenv("ANDROID_KEYSTORE_PASSWORD")
+                keyAlias = System.getenv("ANDROID_KEYSTORE_KEY_NAME")
+                keyPassword = System.getenv("ANDROID_KEYSTORE_KEY_PASSWORD")
+            }
+        }
+    }
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+            if (file(signingKeystorePath).exists()) {
+                signingConfig = signingConfigs.getByName("release")
+            }
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+    kotlinOptions {
+        jvmTarget = "11"
+    }
+    buildFeatures {
+        compose = true
+    }
+    bundle {
+        storeArchive {
+            enable = true
+        }
+    }
+}
+
+dependencies {
+
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.ui)
+    implementation(libs.androidx.ui.graphics)
+    implementation(libs.androidx.ui.tooling.preview)
+    implementation(libs.androidx.material3)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.ui.test.junit4)
+    debugImplementation(libs.androidx.ui.tooling)
+    debugImplementation(libs.androidx.ui.test.manifest)
+}
+
+tasks.register("increaseVersionCode") {
+    doLast {
+        versionProperties["VERSION_CODE"] =
+            (versionProperties["VERSION_CODE"].toString().toInt() + 1).toString()
+        rootProject.file("version.properties").writer().use { writer ->
+            versionProperties.store(writer, null)
+        }
+    }
+}
+
+play {
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.MessageDecoder"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.MessageDecoder">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

app/src/main/java/eu/sailwithdamian/message_decoder/MainActivity.kt

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+package eu.sailwithdamian.message_decoder
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import eu.sailwithdamian.message_decoder.ui.DecoderScreen
+import eu.sailwithdamian.message_decoder.ui.DecoderTheme
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+
+        setContent {
+            DecoderTheme {
+                DecoderScreen()
+            }
+        }
+    }
+}