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/*
* Copyright © 2014-2020 The Android Password Store Authors. All Rights Reserved.
* SPDX-License-Identifier: GPL-3.0-only
*/
package com.zeapo.pwdstore.git
import android.content.Intent
import android.view.MenuItem
import androidx.annotation.CallSuper
import androidx.appcompat.app.AppCompatActivity
import androidx.lifecycle.lifecycleScope
import com.github.ajalt.timberkt.Timber.tag
import com.github.ajalt.timberkt.e
import com.google.android.material.dialog.MaterialAlertDialogBuilder
import com.zeapo.pwdstore.git.config.ConnectionMode
import com.zeapo.pwdstore.git.config.GitSettings
import com.zeapo.pwdstore.git.config.SshApiSessionFactory
import com.zeapo.pwdstore.git.operation.BreakOutOfDetached
import com.zeapo.pwdstore.git.operation.CloneOperation
import com.zeapo.pwdstore.git.operation.GitOperation
import com.zeapo.pwdstore.git.operation.PullOperation
import com.zeapo.pwdstore.git.operation.PushOperation
import com.zeapo.pwdstore.git.operation.ResetToRemoteOperation
import com.zeapo.pwdstore.git.operation.SyncOperation
import com.zeapo.pwdstore.utils.PasswordRepository
import kotlinx.coroutines.launch
/**
* Abstract AppCompatActivity that holds some information that is commonly shared across git-related
* tasks and makes sense to be held here.
*/
abstract class BaseGitActivity : AppCompatActivity() {
private var identityBuilder: SshApiSessionFactory.IdentityBuilder? = null
private var identity: SshApiSessionFactory.ApiIdentity? = null
override fun onOptionsItemSelected(item: MenuItem): Boolean {
return when (item.itemId) {
android.R.id.home -> {
finish()
true
}
else -> super.onOptionsItemSelected(item)
}
}
@CallSuper
override fun onDestroy() {
// Do not leak the service connection
if (identityBuilder != null) {
identityBuilder!!.close()
identityBuilder = null
}
super.onDestroy()
}
/**
* Attempt to launch the requested Git operation. Depending on the configured auth, it may not
* be possible to launch the operation immediately. In that case, this function may launch an
* intermediate activity instead, which will gather necessary information and post it back via
* onActivityResult, which will then re-call this function. This may happen multiple times,
* until either an error is encountered or the operation is successfully launched.
*
* @param operation The type of git operation to launch
*/
suspend fun launchGitOperation(operation: Int) {
if (GitSettings.url == null) {
setResult(RESULT_CANCELED)
finish()
return
}
try {
// Before launching the operation with OpenKeychain auth, we need to issue several requests
// to the OpenKeychain API. IdentityBuild will take care of launching the relevant intents,
// we just need to keep calling it until it returns a completed ApiIdentity.
if (GitSettings.connectionMode == ConnectionMode.OpenKeychain && identity == null) {
// Lazy initialization of the IdentityBuilder
if (identityBuilder == null) {
identityBuilder = SshApiSessionFactory.IdentityBuilder(this)
}
// Try to get an ApiIdentity and bail if one is not ready yet. The builder will ensure
// that onActivityResult is called with operation again, which will re-invoke us here
identity = identityBuilder!!.tryBuild(operation)
if (identity == null)
return
}
val localDir = requireNotNull(PasswordRepository.getRepositoryDirectory())
val op = when (operation) {
REQUEST_CLONE, GitOperation.GET_SSH_KEY_FROM_CLONE -> CloneOperation(localDir, GitSettings.url!!, this)
REQUEST_PULL -> PullOperation(localDir, this)
REQUEST_PUSH -> PushOperation(localDir, this)
REQUEST_SYNC -> SyncOperation(localDir, this)
BREAK_OUT_OF_DETACHED -> BreakOutOfDetached(localDir, this)
REQUEST_RESET -> ResetToRemoteOperation(localDir, this)
SshApiSessionFactory.POST_SIGNATURE -> return
else -> {
tag(TAG).e { "Operation not recognized : $operation" }
setResult(RESULT_CANCELED)
finish()
return
}
}
op.executeAfterAuthentication(GitSettings.connectionMode, identity)
} catch (e: Exception) {
e.printStackTrace()
MaterialAlertDialogBuilder(this).setMessage(e.message).show()
}
}
public override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
// In addition to the pre-operation-launch series of intents for OpenKeychain auth
// that will pass through here and back to launchGitOperation, there is one
// synchronous operation that happens /after/ the operation has been launched in the
// background thread - the actual signing of the SSH challenge. We pass through the
// completed signature to the ApiIdentity, which will be blocked in the other thread
// waiting for it.
if (requestCode == SshApiSessionFactory.POST_SIGNATURE && identity != null) {
identity!!.postSignature(data)
// If the signature failed (usually because it was cancelled), reset state
if (data == null) {
identity = null
identityBuilder = null
}
return
}
if (resultCode == RESULT_CANCELED) {
setResult(RESULT_CANCELED)
finish()
} else if (resultCode == RESULT_OK) {
// If an operation has been re-queued via this mechanism, let the
// IdentityBuilder attempt to extract some updated state from the intent before
// trying to re-launch the operation.
if (identityBuilder != null) {
identityBuilder!!.consume(data)
}
lifecycleScope.launch { launchGitOperation(requestCode) }
}
super.onActivityResult(requestCode, resultCode, data)
}
companion object {
const val REQUEST_ARG_OP = "OPERATION"
const val REQUEST_PULL = 101
const val REQUEST_PUSH = 102
const val REQUEST_CLONE = 103
const val REQUEST_SYNC = 104
const val BREAK_OUT_OF_DETACHED = 105
const val REQUEST_RESET = 106
const val TAG = "AbstractGitActivity"
}
}
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