Merge SshKeyGenFragment into its activity (#897)

* Merge SshKeyGenFragment into its activity

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

* Drop neutral button discouraged by material specs

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

* Address review comments

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

1 files changed, 88 insertions, 6 deletions

diff --git a/app/src/main/java/com/zeapo/pwdstore/sshkeygen/SshKeyGenActivity.kt b/app/src/main/java/com/zeapo/pwdstore/sshkeygen/SshKeyGenActivity.kt
index 2bb04e20..0f844b31 100644
--- a/app/src/main/java/com/zeapo/pwdstore/sshkeygen/SshKeyGenActivity.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/sshkeygen/SshKeyGenActivity.kt
@@ -6,18 +6,48 @@ package com.zeapo.pwdstore.sshkeygen
 
 import android.os.Bundle
 import android.view.MenuItem
+import android.view.View
+import android.view.inputmethod.InputMethodManager
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.edit
+import androidx.core.content.getSystemService
+import androidx.lifecycle.lifecycleScope
+import androidx.preference.PreferenceManager
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.jcraft.jsch.JSch
+import com.jcraft.jsch.KeyPair
+import com.zeapo.pwdstore.R
+import com.zeapo.pwdstore.databinding.ActivitySshKeygenBinding
+import com.zeapo.pwdstore.utils.getEncryptedPrefs
+import com.zeapo.pwdstore.utils.viewBinding
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import java.io.File
+import java.io.FileOutputStream
 
 class SshKeyGenActivity : AppCompatActivity() {
 
-    public override fun onCreate(savedInstanceState: Bundle?) {
+    private var keyLength = 4096
+    private val binding by viewBinding(ActivitySshKeygenBinding::inflate)
+
+    override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        setContentView(binding.root)
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
-        if (savedInstanceState == null) {
-            supportFragmentManager
-                .beginTransaction()
-                .replace(android.R.id.content, SshKeyGenFragment())
-                .commit()
+        with(binding) {
+            generate.setOnClickListener {
+                lifecycleScope.launch { generate(passphrase.text.toString(), comment.text.toString()) }
+            }
+            keyLengthGroup.check(R.id.key_length_4096)
+            keyLengthGroup.addOnButtonCheckedListener { _, checkedId, isChecked ->
+                if (isChecked) {
+                    when (checkedId) {
+                        R.id.key_length_2048 -> keyLength = 2048
+                        R.id.key_length_4096 -> keyLength = 4096
+                    }
+                }
+            }
         }
     }
 
@@ -31,4 +61,56 @@ class SshKeyGenActivity : AppCompatActivity() {
             else -> super.onOptionsItemSelected(item)
         }
     }
+
+    private suspend fun generate(passphrase: String, comment: String) {
+        binding.generate.text = getString(R.string.ssh_key_gen_generating_progress)
+        val e = try {
+            withContext(Dispatchers.IO) {
+                val kp = KeyPair.genKeyPair(JSch(), KeyPair.RSA, keyLength)
+                var file = File(filesDir, ".ssh_key")
+                var out = FileOutputStream(file, false)
+                if (passphrase.isNotEmpty()) {
+                    kp?.writePrivateKey(out, passphrase.toByteArray())
+                } else {
+                    kp?.writePrivateKey(out)
+                }
+                file = File(filesDir, ".ssh_key.pub")
+                out = FileOutputStream(file, false)
+                kp?.writePublicKey(out, comment)
+            }
+            null
+        } catch (e: Exception) {
+            e.printStackTrace()
+            e
+        } finally {
+            getEncryptedPrefs("git_operation").edit {
+                remove("ssh_key_local_passphrase")
+            }
+        }
+        binding.generate.text = getString(R.string.ssh_keygen_generating_done)
+        if (e == null) {
+            val df = ShowSshKeyFragment()
+            df.show(supportFragmentManager, "public_key")
+            val prefs = PreferenceManager.getDefaultSharedPreferences(this)
+            prefs.edit { putBoolean("use_generated_key", true) }
+        } else {
+            MaterialAlertDialogBuilder(this)
+                .setTitle(getString(R.string.error_generate_ssh_key))
+                .setMessage(getString(R.string.ssh_key_error_dialog_text) + e.message)
+                .setPositiveButton(getString(R.string.dialog_ok)) { _, _ ->
+                    finish()
+                }
+                .show()
+        }
+        hideKeyboard()
+    }
+
+    private fun hideKeyboard() {
+        val imm = getSystemService<InputMethodManager>() ?: return
+        var view = currentFocus
+        if (view == null) {
+            view = View(this)
+        }
+        imm.hideSoftInputFromWindow(view.windowToken, 0)
+    }
 }