Revert "Rename source directory"

This reverts commit dbba24e

5 files changed, 314 insertions, 0 deletions

diff --git a/app/src/main/java/org/pacien/tincapp/commands/Command.kt b/app/src/main/java/org/pacien/tincapp/commands/Command.kt
new file mode 100644
index 0000000..132cda9
--- /dev/null
+++ b/app/src/main/java/org/pacien/tincapp/commands/Command.kt
@@ -0,0 +1,46 @@
+/*
+ * Tinc App, an Android binding and user interface for the tinc mesh VPN daemon
+ * Copyright (C) 2017-2018 Pacien TRAN-GIRARD
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.pacien.tincapp.commands
+
+import java.util.*
+
+/**
+ * @author pacien
+ */
+internal class Command(private val cmd: String) {
+  private data class Option(val key: String, val value: String?) {
+    fun toCommandLineOption(): String = if (value != null) "--$key=$value" else "--$key"
+  }
+
+  private val opts: MutableList<Option> = LinkedList()
+  private val args: MutableList<String> = LinkedList()
+
+  fun withOption(key: String, value: String? = null): Command {
+    this.opts.add(Option(key, value))
+    return this
+  }
+
+  fun withArguments(vararg args: String): Command {
+    this.args.addAll(Arrays.asList(*args))
+    return this
+  }
+
+  fun asList(): List<String> = listOf(cmd) + opts.map { it.toCommandLineOption() } + args
+  fun asArray(): Array<String> = this.asList().toTypedArray()
+}
diff --git a/app/src/main/java/org/pacien/tincapp/commands/Executor.kt b/app/src/main/java/org/pacien/tincapp/commands/Executor.kt
new file mode 100644
index 0000000..29e011f
--- /dev/null
+++ b/app/src/main/java/org/pacien/tincapp/commands/Executor.kt
@@ -0,0 +1,85 @@
+/*
+ * Tinc App, an Android binding and user interface for the tinc mesh VPN daemon
+ * Copyright (C) 2017-2018 Pacien TRAN-GIRARD
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.pacien.tincapp.commands
+
+import android.os.AsyncTask
+import java8.util.concurrent.CompletableFuture
+import java8.util.function.Supplier
+import java.io.BufferedReader
+import java.io.IOException
+import java.io.InputStream
+import java.io.InputStreamReader
+
+/**
+ * @author pacien
+ */
+internal object Executor {
+  private const val FAILED = -1
+  private const val SUCCESS = 0
+
+  class CommandExecutionException(msg: String) : Exception(msg)
+
+  init {
+    System.loadLibrary("exec")
+  }
+
+  /**
+   * @return FAILED (-1) on error, forked child PID otherwise
+   */
+  private external fun forkExec(args: Array<String>): Int
+
+  /**
+   * @return FAILED (-1) on error, the exit status of the process otherwise
+   */
+  private external fun wait(pid: Int): Int
+
+  private fun read(stream: InputStream) = BufferedReader(InputStreamReader(stream)).readLines()
+
+  fun forkExec(cmd: Command): CompletableFuture<Unit> {
+    val pid = forkExec(cmd.asArray()).also {
+      if (it == FAILED) throw CommandExecutionException("Could not fork child process.")
+    }
+
+    return runAsyncTask {
+      val exitCode = wait(pid)
+      when (exitCode) {
+        SUCCESS -> Unit
+        FAILED -> throw CommandExecutionException("Process terminated abnormally.")
+        else -> throw CommandExecutionException("Non-zero exit status code ($exitCode).")
+      }
+    }
+  }
+
+  fun run(cmd: Command): Process = try {
+    ProcessBuilder(cmd.asList()).start()
+  } catch (e: IOException) {
+    throw CommandExecutionException(e.message ?: "Could not start process.")
+  }
+
+  fun call(cmd: Command): CompletableFuture<List<String>> = run(cmd).let { process ->
+    supplyAsyncTask<List<String>> {
+      val exitCode = process.waitFor()
+      if (exitCode == 0) read(process.inputStream)
+      else throw CommandExecutionException(read(process.errorStream).lastOrNull() ?: "Non-zero exit status ($exitCode).")
+    }
+  }
+
+  fun runAsyncTask(r: () -> Unit) = CompletableFuture.supplyAsync(Supplier(r), AsyncTask.THREAD_POOL_EXECUTOR)!!
+  fun <U> supplyAsyncTask(s: () -> U) = CompletableFuture.supplyAsync(Supplier(s), AsyncTask.THREAD_POOL_EXECUTOR)!!
+}
diff --git a/app/src/main/java/org/pacien/tincapp/commands/Tinc.kt b/app/src/main/java/org/pacien/tincapp/commands/Tinc.kt
new file mode 100644
index 0000000..7f684c4
--- /dev/null
+++ b/app/src/main/java/org/pacien/tincapp/commands/Tinc.kt
@@ -0,0 +1,72 @@
+/*
+ * Tinc App, an Android binding and user interface for the tinc mesh VPN daemon
+ * Copyright (C) 2017-2018 Pacien TRAN-GIRARD
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.pacien.tincapp.commands
+
+import java8.util.concurrent.CompletableFuture
+import org.pacien.tincapp.context.AppPaths
+
+/**
+ * @author pacien
+ */
+object Tinc {
+  private fun newCommand(netName: String): Command =
+    Command(AppPaths.tinc().absolutePath)
+      .withOption("config", AppPaths.confDir(netName).absolutePath)
+      .withOption("pidfile", AppPaths.pidFile(netName).absolutePath)
+
+  fun stop(netName: String): CompletableFuture<Unit> =
+    Executor.call(newCommand(netName).withArguments("stop"))
+      .thenApply { }
+
+  fun pid(netName: String): CompletableFuture<Int> =
+    Executor.call(newCommand(netName).withArguments("pid"))
+      .thenApply { Integer.parseInt(it.first()) }
+
+  fun dumpNodes(netName: String, reachable: Boolean = false): CompletableFuture<List<String>> =
+    Executor.call(
+      if (reachable) newCommand(netName).withArguments("dump", "reachable", "nodes")
+      else newCommand(netName).withArguments("dump", "nodes"))
+
+  fun info(netName: String, node: String): CompletableFuture<String> =
+    Executor.call(newCommand(netName).withArguments("info", node))
+      .thenApply<String> { it.joinToString("\n") }
+
+  fun init(netName: String, nodeName: String): CompletableFuture<String> =
+    if (netName.isBlank())
+      CompletableFuture.failedFuture(IllegalArgumentException("Network name cannot be blank."))
+    else
+      Executor.call(Command(AppPaths.tinc().absolutePath)
+        .withOption("config", AppPaths.confDir(netName).absolutePath)
+        .withArguments("init", nodeName))
+        .thenApply<String> { it.joinToString("\n") }
+
+  fun join(netName: String, invitationUrl: String): CompletableFuture<String> =
+    if (netName.isBlank())
+      CompletableFuture.failedFuture(IllegalArgumentException("Network name cannot be blank."))
+    else
+      Executor.call(Command(AppPaths.tinc().absolutePath)
+        .withOption("config", AppPaths.confDir(netName).absolutePath)