show age for passwords in detail view (#339)

* show age for passwords in detail view

Implements #330.
This fetches the latest commit where the respective password file was
changed from the current HEAD and outputs the relative time since
the last change on the decrypt page.

* Move lastChanged logic out of PgpActivity

This nicely encapsulates the lastChanged logic (and thus separates it
from dependencies like git). The last changed date is now passed as a
timestamp using the Intent's extra info.

11 files changed, 76 insertions, 0 deletions

diff --git a/app/src/main/java/com/zeapo/pwdstore/PasswordStore.java b/app/src/main/java/com/zeapo/pwdstore/PasswordStore.java
index acfadf99..99593700 100644
--- a/app/src/main/java/com/zeapo/pwdstore/PasswordStore.java
+++ b/app/src/main/java/com/zeapo/pwdstore/PasswordStore.java
@@ -42,7 +42,9 @@ import com.zeapo.pwdstore.utils.PasswordRepository;
 
 import org.apache.commons.io.FileUtils;
 import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.lib.Repository;
+import org.eclipse.jgit.revwalk.RevCommit;
 
 import java.io.File;
 import java.util.ArrayList;
@@ -406,11 +408,40 @@ public class PasswordStore extends AppCompatActivity {
         }
     }
 
+    private String getRelativePath(String fullPath, String repositoryPath) {
+        return fullPath.replace(repositoryPath, "").replaceAll("/+", "/");
+    }
+
+    public int getLastChangedTimestamp(String fullPath) {
+        File repoPath = PasswordRepository.getRepositoryDirectory(this);
+        Repository repository = PasswordRepository.getRepository(repoPath);
+
+        if (repository == null) {
+            return -1;
+        }
+
+        Git git = new Git(repository);
+        String relativePath = getRelativePath(fullPath, repoPath.getAbsolutePath()).substring(1);
+        Iterable<RevCommit> iterable;
+
+        try {
+            iterable = git.log().addPath(relativePath).call();
+        } catch (GitAPIException e) {
+            System.out.println("Exception caught :(");
+            e.printStackTrace();
+            return -1;
+        }
+
+        RevCommit latestCommit = iterable.iterator().next();
+        return latestCommit.getCommitTime();
+    }
+
     public void decryptPassword(PasswordItem item) {
         Intent intent = new Intent(this, PgpActivity.class);
         intent.putExtra("NAME", item.toString());
         intent.putExtra("FILE_PATH", item.getFile().getAbsolutePath());
         intent.putExtra("REPO_PATH", PasswordRepository.getRepositoryDirectory(getApplicationContext()).getAbsolutePath());
+        intent.putExtra("LAST_CHANGED_TIMESTAMP", getLastChangedTimestamp(item.getFile().getAbsolutePath()));
         intent.putExtra("OPERATION", "DECRYPT");
 
         // Adds shortcut
diff --git a/app/src/main/java/com/zeapo/pwdstore/crypto/PgpActivity.kt b/app/src/main/java/com/zeapo/pwdstore/crypto/PgpActivity.kt
index 19b71b72..1a8a5051 100644
--- a/app/src/main/java/com/zeapo/pwdstore/crypto/PgpActivity.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/crypto/PgpActivity.kt
@@ -12,6 +12,7 @@ import android.os.SystemClock
 import android.preference.PreferenceManager
 import android.support.v7.app.AppCompatActivity
 import android.text.TextUtils
+import android.text.format.DateUtils
 import android.text.method.PasswordTransformationMethod
 import android.util.Log
 import android.view.*
@@ -20,6 +21,7 @@ import com.zeapo.pwdstore.PasswordEntry
 import com.zeapo.pwdstore.R
 import com.zeapo.pwdstore.UserPreference
 import com.zeapo.pwdstore.pwgenDialogFragment
+import com.zeapo.pwdstore.utils.PasswordRepository
 import com.zeapo.pwdstore.utils.Totp
 import kotlinx.android.synthetic.main.decrypt_layout.*
 import kotlinx.android.synthetic.main.encrypt_layout.*
@@ -47,6 +49,7 @@ class PgpActivity : AppCompatActivity(), OpenPgpServiceConnection.OnBound {
 
     private val fullPath: String by lazy { intent.getStringExtra("FILE_PATH") }
     private val name: String by lazy { getName(fullPath, repoPath) }
+    private val lastChangedString: CharSequence by lazy { getLastChangedString(intent.getIntExtra("LAST_CHANGED_TIMESTAMP", -1)) }
     private val relativeParentPath: String by lazy { getParentPath(fullPath, repoPath) }
 
     private val settings: SharedPreferences by lazy { PreferenceManager.getDefaultSharedPreferences(this) }
@@ -76,6 +79,13 @@ class PgpActivity : AppCompatActivity(), OpenPgpServiceConnection.OnBound {
                 setContentView(R.layout.decrypt_layout)
                 crypto_password_category_decrypt.text = relativeParentPath
                 crypto_password_file.text = name
+
+                crypto_password_last_changed.text = try {
+                    this.resources.getString(R.string.last_changed, lastChangedString)
+                } catch (e: RuntimeException) {
+                    showToast(getString(R.string.get_last_changed_failed))
+                    ""
+                }
             }
             "ENCRYPT" -> {
                 setContentView(R.layout.encrypt_layout)
@@ -514,6 +524,18 @@ class PgpActivity : AppCompatActivity(), OpenPgpServiceConnection.OnBound {
         delayTask?.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR)
     }
 
+    /**
+     * Gets a relative string describing when this shape was last changed
+     * (e.g. "one hour ago")
+     */
+    private fun getLastChangedString(timeStamp: Int): CharSequence {
+        if (timeStamp < 0) {
+            throw RuntimeException()
+        }
+
+        return DateUtils.getRelativeTimeSpanString(this, timeStamp.toLong() * 1000, true)
+    }
+
     @SuppressLint("StaticFieldLeak")
     inner class DelayShow(val activity: PgpActivity) : AsyncTask<Void, Int, Boolean>() {
         private val pb: ProgressBar by lazy { pbLoading }
diff --git a/app/src/main/res/layout/decrypt_layout.xml b/app/src/main/res/layout/decrypt_layout.xml
index 48247c57..e5095d66 100644
--- a/app/src/main/res/layout/decrypt_layout.xml
+++ b/app/src/main/res/layout/decrypt_layout.xml
@@ -43,6 +43,19 @@
                 android:textSize="24sp"
                 android:textStyle="bold"
                 tools:ignore="HardcodedText" />
+
+            <TextView
+                android:id="@+id/crypto_password_last_changed"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
+                android:layout_marginLeft="16dp"
+                android:layout_marginStart="16dp"
+                android:text="LAST CHANGED HERE"
+                android:textColor="@color/grey_500"
+                android:textIsSelectable="false"
+                android:textSize="18sp"
+                tools:ignore="HardcodedText" />
         </LinearLayout>
 
         <ImageView
diff --git a/app/src/main/res/values-cs/strings.xml b/app/src/main/res/values-cs/strings.xml
index 5feaec77..a8bb0a50 100644
--- a/app/src/main/res/values-cs/strings.xml
+++ b/app/src/main/res/values-cs/strings.xml
@@ -153,4 +153,5 @@
     <string name="no_repo_selected">Nebyl vybrát externí repozitář</string>
     <string name="send_plaintext_password_to">Odeslat heslo jako plaintext za použití…</string>
     <string name="show_password">Pokaż hasło</string>
+    <string name="get_last_changed_failed">Failed to get last changed date</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 80b16cd9..8c63a37b 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -194,4 +194,6 @@
     <string name="autofill_ins_1_hint">Bildschirmfoto Accessibility Services</string>
     <string name="autofill_ins_2_hint">Bildschirmfoto des Schalters in Accessibility Services</string>
     <string name="autofill_ins_3_hint">Bildschirmfoto von Autofill in Aktion</string>
+    <string name="last_changed">Zuletzt geändert %s</string>
+    <string name="get_last_changed_failed">Das Abrufen des letzten Änderungsdatums ist fehlgeschlagen.</string>
 </resources>
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index 3180a494..6db46765 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -186,4 +186,5 @@
     <string name="show_extra_content_pref_title">Afficher le contenu supplémentaire</string>
     <string name="username">Nom d\'utilisateur</string>
     <string name="ssh_key_does_not_exist">Impossible d\'ouvrir la clef ssh, merci de vérifier que le ficher existe</string>
+    <string name="get_last_changed_failed">Failed to get last changed date</string>
 </resources>
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 9ab13ff0..def249be 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -157,4 +157,5 @@
     <string name="no_repo_selected">外部リポジトリが選択されていません</string>
     <string name="send_plaintext_password_to">パスワードをプレーンテキストとして送信…</string>
     <string name="show_password">パスワードを表示</string>
+    <string name="get_last_changed_failed">Failed to get last changed date</string>
 </resources>
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index 24fe4e58..d8177901 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -188,4 +188,5 @@
     <string name="autofill_paste">Вставить</string>
     <string name="autofill_paste_username">Вставить имя пользователя?\n\n%s</string>
     <string name="autofill_toast_username">Выберите поле ввода для вставки имени пользователя.\nИмя пользователя можно вставить в течение %d секунд.</string>
+    <string name="get_last_changed_failed">Failed to get last changed date</string>
 </resources>
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index ba6dfa5a..bcba3ca2 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -121,4 +121,5 @@
     <string name="server_resulting_url">生成的 URL</string>
     <string name="autofill_apps_match_ellipsis">匹配…</string>
     <string name="pref_crypto_title">加密</string>
+    <string name="get_last_changed_failed">Failed to get last changed date</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 43e51818..d0970f00 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -121,4 +121,5 @@
     <string name="server_resulting_url">生成的 URL</string>
     <string name="autofill_apps_match_ellipsis">匹配…</string>
     <string name="pref_crypto_title">加密</string>
+    <string name="get_last_changed_failed">Failed to get last changed date</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index dd286625..8a5f0e39 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -98,6 +98,7 @@
     <string name="copy_password">Copy password</string>
     <string name="copy_username">Copy username</string>
     <string name="share_as_plaintext">Share as plaintext</string>
+    <string name="last_changed">Last changed %s</string>
 
     <!-- Preferences -->
     <string name="pref_git_title">Git</string>
@@ -217,4 +218,5 @@
     <string name="commit_hash">Commit hash</string>
     <string name="crypto_password_edit_hint">p@ssw0rd!</string>
     <string name="crypto_extra_edit_hint">username: something other extra content</string>
+    <string name="get_last_changed_failed">Failed to get last changed date</string>
 </resources>