From 99cf74f624dd3e66fb59ab5efe5c6a87ca9e8622 Mon Sep 17 00:00:00 2001
From: The Navid <thenavid2005@gmail.com>
Date: Mon, 27 May 2024 20:15:24 +0330
Subject: [PATCH 1/5] create Email Validator class

---
 .../Graphical Login Page/bin/EmailValidator.class | Bin 0 -> 783 bytes
 .../Graphical Login Page/src/EmailValidator.java  |   9 +++++++++
 2 files changed, 9 insertions(+)
 create mode 100644 Answers/40230212013/Graphical Login Page/bin/EmailValidator.class
 create mode 100644 Answers/40230212013/Graphical Login Page/src/EmailValidator.java

diff --git a/Answers/40230212013/Graphical Login Page/bin/EmailValidator.class b/Answers/40230212013/Graphical Login Page/bin/EmailValidator.class
new file mode 100644
index 0000000000000000000000000000000000000000..62e976464eb2f8ac9c94c8a79fdf7039044bbc9e
GIT binary patch
literal 783
zcmZ`%T~8B16g`)1yX|%bECS*eqNr`jvL?m{Q#2Z)PxT|I;h{v6=`v}DY<F>)65?<2
z1x?WS;1BRe8ShLtLQUCZcjnHVbMLw5?(aW8e*t)k4Hq+n*_T71;vEsIJ)zUgMS(EC
zFOEbQi=-dE?d{7*6Ux%S4g_yk+V*;+RUBrrFOS1_LTi~NErxAHu}YMFMsVtl9YSF{
z-IHZh39GvwUj$tde0~@_*$h5xJl~xN*F9XqoQqk)@&);Q%;Pe_jnd(PiX|bakEK|p
z9i6G9-)dZ_t^&e>k0MHhxwcB=o6)c*v-hHBa@E>tB-n>cnK(ZzZP{i#IJoL#31x0b
z57Z%B)SmQ>dw12LwUMwmO;^`6c+1BsZZmc$bTp6|;n8{Q_CRDE`DrARNKWbG^_bN1
za0lxy?oP2PhxoXM`~S+YUY<smP_$Dt&7Ms-_l@9n(oq)4SJv8v$@Vr49&7BN!~YK9
znz5004$5%(B~&<S@M@k)&HDlW8)_#U%-{-tOZKXOMSEgWu$wt8<kb+1&F@(LpW;}G
vKL%ihD|3Ea$Bmr)m<t$k^($)4Q`|ho+80~ntg3r1MHLTF=X+wYMqBeQy(g-4

literal 0
HcmV?d00001

diff --git a/Answers/40230212013/Graphical Login Page/src/EmailValidator.java b/Answers/40230212013/Graphical Login Page/src/EmailValidator.java
new file mode 100644
index 0000000..5a94493
--- /dev/null
+++ b/Answers/40230212013/Graphical Login Page/src/EmailValidator.java	
@@ -0,0 +1,9 @@
+import java.util.regex.Pattern;
+
+public class EmailValidator {
+  private static final Pattern emailpat = Pattern.compile("[^A-Za-z0-9.-]+@[A-Za-z0-9.-]+$");
+  public static boolean isValid(String email)
+  {
+    return emailpat.matcher(email).matches();
+  }
+}

From bcfc76b6d688ab6d84f7280ef4ad2ec2fabd0f52 Mon Sep 17 00:00:00 2001
From: The Navid <thenavid2005@gmail.com>
Date: Mon, 27 May 2024 20:39:48 +0330
Subject: [PATCH 2/5] create PasswordUtils class

---
 .../bin/PasswordUtils.class                   | Bin 0 -> 1166 bytes
 .../src/PasswordUtils.java                    |  20 ++++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 Answers/40230212013/Graphical Login Page/bin/PasswordUtils.class
 create mode 100644 Answers/40230212013/Graphical Login Page/src/PasswordUtils.java

diff --git a/Answers/40230212013/Graphical Login Page/bin/PasswordUtils.class b/Answers/40230212013/Graphical Login Page/bin/PasswordUtils.class
new file mode 100644
index 0000000000000000000000000000000000000000..2467d413fe856e7a692f7fde6d6c18e6b97570ea
GIT binary patch
literal 1166
zcmZ`(+fvg|6kVrDnqC5wXt|@-D<GvR2q*<XkQrxMWv0RdmvKURY=a@KX)2C?(q~_J
zvCg35gCF37pQP?{8V8wyJY?_eu6<i;Pk;XY{sX`w)^$V}x;Csv<EZABHv`9Q=ujC_
z2iAKl=UQGR_j3P$+W|weQRlW}xvN#nXBaF<M3XXdKCkc(xeY4_xbH16#0#|}?%P&_
zlfPN7|MRsqr{YkhSl)IW&k2?ol(F$G26eSo<}q|L=sU~1+1FEh38Y}^=w;}?ppSt|
zxJ(Il?Xd2+)G0gG8A%RZ3Vg?_ER0_`WgHBB1~f!t7+}zLtn9}<5gan0i{OX|u4K1m
z@QQ($2wr1|?3M-Wx`8;N3_S(M<1d<r``mwJ?Tb0gLd~|^Ez5VrcNmQ3<-!RlxMScJ
zlC*SCbsD0;8TN_3nA7Nt&yYTEr|kr?$my6mBU2~Ez&+e&h`QXX1XaoJbHU}bff+m`
zx(=<tu5uD^`v1~G(-MEz<etsXA+6X+T1a3Hk95qRqe=)d@EEj$`o{6fvimmeQxDHe
zaC3TBp+rQpE6#<15msx8b0J&qoQfVE9UW;Yu<W-*s~$3%DAk(2&DW*&<{1vBL=$94
zC55hB#gLGhydj~iv?QjqBq3Ra#7!Vcc!R!*WW|#)yS}043({u4w1eibw4>%#X)~V*
z6u}L8o76-!iczB!l^mc(H|4LOVx)FhI!9I%*CxK=_Gx-l1{IlNbO0E`I056Bz+H-n
zxqeYIjcjq^1e2-QCuquX8-w)q-~_YzHbz5tv5idVF13*k-C1?G1#_f@?$H(!X|)AS
zJywpXpdxp;LNkMCh*Ps9y3vOoqA-O?^kSYi6#L9{20)(vIzWgyEa3@_mm$<Lc@eT1
itdOTrP8v_iQ?W|eUPO|A=u6X)W%N*pVU6AqJo^j7U+o_N

literal 0
HcmV?d00001

diff --git a/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java b/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java
new file mode 100644
index 0000000..31941e4
--- /dev/null
+++ b/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java	
@@ -0,0 +1,20 @@
+import java.util.regex.Pattern;
+
+public class PasswordUtils {
+  private static final Pattern specialChar = Pattern.compile("[@\\-_.]");
+  private static final Pattern Lowercase = Pattern.compile("[a-z]");
+  private static final Pattern Uppercase = Pattern.compile("[A-Z]");
+  private static final Pattern Digit = Pattern.compile("\\d");
+  public static boolean isString(String password)
+  {
+    if(password.length()<= 8)
+    {
+      return false;
+    }
+    boolean lower = Lowercase.matcher(password).find();
+    boolean upper = Uppercase.matcher(password).find();
+    boolean digit = Digit.matcher(password).find();
+    boolean special = specialChar.matcher(password).find();
+    return lower && upper && digit && special;
+  }
+}

From fe44097f8a75e58cc6d3c276eaaebb7cb6de5264 Mon Sep 17 00:00:00 2001
From: The Navid <thenavid2005@gmail.com>
Date: Tue, 28 May 2024 22:07:01 +0330
Subject: [PATCH 3/5] changed (isStrong) method in Password Utils class

---
 .../bin/PasswordUtils.class                   | Bin 1166 -> 944 bytes
 .../src/PasswordUtils.java                    |  23 +++++++++++++++---
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/Answers/40230212013/Graphical Login Page/bin/PasswordUtils.class b/Answers/40230212013/Graphical Login Page/bin/PasswordUtils.class
index 2467d413fe856e7a692f7fde6d6c18e6b97570ea..65ad247cfe46b24b8a4eb5c31fb54acab691593f 100644
GIT binary patch
delta 333
zcmeC<+`!It>ff$?3=9mm45k~oW--?1=cO|;h-&y`C6*=X=OpH(>j#$<W#*+@Yeum%
z=rS_!BP3jlit>v%81xw#dP4JxQj7C*%2HDllJj#5GIJ73GV}8k3X1ZRa#C}PtrWO8
zLn;eW6>>9+a}!IFGprPn6Z7)&OMt5L%2JC;6w-?Fa}@#-OX^Efi}Dmo@)eTu^K()Y
z^N7-ynOB0Wg^NLl!H|bRmB9#yPr?`(xPtRbi;`2_GILTH8H557i;K(ii&8>MCf{MY
tX{yD*%)kf?6RzD1I*~$p+Zhb@19?mg%0QA0EF;gL0v2Ha@{GYO69Bj-VEF(5

delta 513
zcmZXRy>Ami5XFCcAGzdW633E>5CqABB0)|L$R{`n9|0sJT$#$<#@U<?j?3kICUkD8
zXi}M$)&;moLBStD!9PO}OkztQvBm70nfG>{W<Pr$ru^@}zJ3FCc=pBrsO%^SPg85Y
z*YsH?@K{k4U+K3xh;<SMjXV=Vf!o|sOvEM$^R~iXTzc+PWVOH=>k99U&RcDhDOML>
z{1xxDb=EM)U6Zs-ZE4i#=20AECN%GY`bbps+2mf&V@olAA^x9J;662la~LHD7vr0X
z$y9ebCr6nSO8*QUITo@TADx_AQo?n+X?l*`gD8x0G2BT_E7GyzQX|)`*L6LSzSR4%
zIel;a?ES#Pl@--*olz}Le!{f}L#{}6_l%A0Aq!);Go&(xyF<!jxZzywQ@Yk?W}%N?
zcKW!^z#hnhHa8?*$CKzYMS*E%xXdgS*=ChFwkXlODebk91GeR(5XvUIJU|Jt%0oex
i+!Y=PvPD$pu^@*%;m%=A|CY@4SXOeRq<A9H;^`mZe{X#N

diff --git a/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java b/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java
index 31941e4..34e9c59 100644
--- a/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java	
+++ b/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java	
@@ -5,16 +5,33 @@ public class PasswordUtils {
   private static final Pattern Lowercase = Pattern.compile("[a-z]");
   private static final Pattern Uppercase = Pattern.compile("[A-Z]");
   private static final Pattern Digit = Pattern.compile("\\d");
-  public static boolean isString(String password)
+  public static boolean isStrong(String password)
   {
+    int strength = 0;
     if(password.length()<= 8)
     {
-      return false;
+      strength++;
     }
     boolean lower = Lowercase.matcher(password).find();
     boolean upper = Uppercase.matcher(password).find();
     boolean digit = Digit.matcher(password).find();
     boolean special = specialChar.matcher(password).find();
-    return lower && upper && digit && special;
+    if(lower || upper || digit)
+    {
+      strength++;
+    }
+    if(lower && upper)
+    {
+      strength++;
+    }
+    if(lower && upper && digit)
+    {
+      strength++;
+    }
+    if(specialChar)
+  {
+    strength++;
+  }
+  return strength;
   }
 }

From 1185f0a89f342707914582c8c1254e5588f0b8de Mon Sep 17 00:00:00 2001
From: The Navid <thenavid2005@gmail.com>
Date: Tue, 28 May 2024 23:25:08 +0330
Subject: [PATCH 4/5] create User class and UserStore class

---
 .../Graphical Login Page/bin/User.class       | Bin 0 -> 1802 bytes
 .../Graphical Login Page/bin/UserStore.class  | Bin 0 -> 3637 bytes
 .../Graphical Login Page/src/User.java        |  41 +++++++++++
 .../Graphical Login Page/src/UserStore.java   |  66 ++++++++++++++++++
 4 files changed, 107 insertions(+)
 create mode 100644 Answers/40230212013/Graphical Login Page/bin/User.class
 create mode 100644 Answers/40230212013/Graphical Login Page/bin/UserStore.class
 create mode 100644 Answers/40230212013/Graphical Login Page/src/User.java
 create mode 100644 Answers/40230212013/Graphical Login Page/src/UserStore.java

diff --git a/Answers/40230212013/Graphical Login Page/bin/User.class b/Answers/40230212013/Graphical Login Page/bin/User.class
new file mode 100644
index 0000000000000000000000000000000000000000..c29b22de99718479352690c5ec675be055a17a88
GIT binary patch
literal 1802
zcma)6*>V#{6g{nNBr!rkST<%~jHAWEU<V~2aAJXp4e}~uB9uIg<v|)E&8TKZEbsY|
zJmr;C#Y;hjyyqM8Etu0Il{e(7JV<?~`<{F5J$-Ng`|15h0Qd2W0-r$OsiWHp0s>#X
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ufy-oghM(wHAu0|3E<=VDWE6}jc&>0Dg`fdk+NBIMGxBeNfGPn#{QMaoqJL%p

literal 0
HcmV?d00001

diff --git a/Answers/40230212013/Graphical Login Page/bin/UserStore.class b/Answers/40230212013/Graphical Login Page/bin/UserStore.class
new file mode 100644
index 0000000000000000000000000000000000000000..0db41ce081b1f449f8c104f8318c47326c455eee
GIT binary patch
literal 3637
zcmb7G`&S#s75)Y!tt8eVfFa0DV!5_?SUg<EPHbemwF!<L19lC@#%bCv(gJIiU1fI#
zrfHkDiPOCLOdm=5O4FwF;Xa(SP{KKJf9R>t>2Ljaa(e21GrIy|NKUIoVrS;geSF`Y
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z;91U8USM0l>-d4;1Y?F>Hj_wEVVMg3p5Pj{#?`w(eYm$ASa$D_QR2qbh&AOHLD{3`
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zzH85!#caWyEm^h^Sgw;Tc`i54_GQzl(P=X~YX;M9F>AX<QAXi+bY?9-TXu@(B+VDI
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zIvCy><d^Xa{E{F)#B7$J#wcA4>SGerb|k7mT_9_(0PT0M9kC7b#PdT@uEpClT!UX>
Yk^h<Y_&vXWz@Iphx9yvF7k@$Kzk4KY#sB~S

literal 0
HcmV?d00001

diff --git a/Answers/40230212013/Graphical Login Page/src/User.java b/Answers/40230212013/Graphical Login Page/src/User.java
new file mode 100644
index 0000000..2a8e4ed
--- /dev/null
+++ b/Answers/40230212013/Graphical Login Page/src/User.java	
@@ -0,0 +1,41 @@
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+public class User {
+  private String username;
+  private String hashPassword;
+  private String email;
+  public User(String username, String password, String email)
+  {
+    this.username = username;
+    this.hashPassword = hashPassword(password);
+    this.email = email;
+  }
+  public String getUsername() {
+    return username;
+  }
+  public String getHashPassword() {
+    return hashPassword;
+  }
+  public String getEmail() {
+    return email;
+  }
+   public static String hashPassword(String password)
+  {
+  try
+  {
+    MessageDigest digest = MessageDigest.getInstance("SHA-256");
+    byte[] hash = digest.digest(password.getBytes());
+    StringBuilder str = new StringBuilder();
+    for(byte b : hash)
+    {
+      str.append(String.format("%02x", b));
+    }
+    return str.toString();
+  }
+  catch(NoSuchAlgorithmException e)
+  {
+    throw new RuntimeException(e);
+  }
+}
+}
diff --git a/Answers/40230212013/Graphical Login Page/src/UserStore.java b/Answers/40230212013/Graphical Login Page/src/UserStore.java
new file mode 100644
index 0000000..0e87cd9
--- /dev/null
+++ b/Answers/40230212013/Graphical Login Page/src/UserStore.java	
@@ -0,0 +1,66 @@
+import java.util.HashMap;
+import java.util.Map;
+import java.io.*;
+public class UserStore {
+  private static final String file = "users.txt";
+  private static Map<String, User> users = new HashMap<>();
+  public UserStore()
+  {
+    loadUsers();
+  }
+  public boolean register(User user)
+  {
+    if(users.containsKey(user.getUsername()))
+    {
+      return false;
+    }
+    users.put(user.getUsername(), user);
+    saveUsers();
+    return true;
+  }
+  public boolean login(String username, String password)
+  {
+    User user = users.get(username);
+    if (user == null)
+    {
+      return false;
+    }
+    String hashPassword = User.hashPassword(password);
+    return hashPassword.equals(user.getHashPassword());
+  }
+  private void loadUers()
+  {
+    try(BufferedReader bufr = new BufferedReader(new FileReader(file)))
+    {
+      String line;
+      while ((line = bufr.readLine()) != null) 
+      {
+        String[] parts = line.split(",");
+        if(parts.length == 3)
+        {
+          User user = new User(parts[0], parts[1], parts[2]);
+          users.put(user.getUsername(), user);
+        }
+      }
+    }
+    catch(IOException e)
+    {
+      e.printStackTrace();
+    }
+  }
+  private void saveUsers()
+  {
+  try(BufferedWriter bufw = new BufferedWriter(new FileWriter(file)))
+  {
+    for(User user : users.values())
+    {
+      bufw.write(user.getUsername() + "," + user.getHashPassword() + "," + user.getEmail());
+      bufw.newLine();
+    }
+  }
+  catch(IOException e)
+  {
+    e.printStackTrace();
+  }
+}
+}

From db1396c4b595d0c56f72a22e6abf848c5f50f531 Mon Sep 17 00:00:00 2001
From: The Navid <thenavid2005@gmail.com>
Date: Wed, 29 May 2024 00:05:19 +0330
Subject: [PATCH 5/5] create login class and myapp class

---
 .../.vscode/settings.json                     |   7 ++
 .../Graphical Login Page/README.md            |  18 ++++
 .../Graphical Login Page/bin/App.class        | Bin 0 -> 456 bytes
 .../bin/EmailValidator.class                  | Bin 783 -> 798 bytes
 .../Graphical Login Page/bin/LoginGUI$1.class | Bin 0 -> 1309 bytes
 .../Graphical Login Page/bin/LoginGUI$2.class | Bin 0 -> 2167 bytes
 .../Graphical Login Page/bin/LoginGUI.class   | Bin 0 -> 1766 bytes
 .../bin/PasswordUtils.class                   | Bin 944 -> 1271 bytes
 .../Graphical Login Page/bin/UserStore.class  | Bin 3637 -> 3489 bytes
 .../Graphical Login Page/src/App.class        | Bin 0 -> 321 bytes
 .../Graphical Login Page/src/App.java         |   6 ++
 .../src/EmailValidator.java                   |  14 +--
 .../Graphical Login Page/src/LoginGUI$1.class | Bin 0 -> 1118 bytes
 .../Graphical Login Page/src/LoginGUI$2.class | Bin 0 -> 1899 bytes
 .../Graphical Login Page/src/LoginGUI.class   | Bin 0 -> 1570 bytes
 .../Graphical Login Page/src/LoginGUI.java    |  85 ++++++++++++++++++
 .../src/PasswordUtils.java                    |   4 +-
 .../Graphical Login Page/src/UserStore.java   |   8 +-
 .../Graphical Login Page/users.txt            |   1 +
 19 files changed, 131 insertions(+), 12 deletions(-)
 create mode 100644 Answers/40230212013/Graphical Login Page/.vscode/settings.json
 create mode 100644 Answers/40230212013/Graphical Login Page/README.md
 create mode 100644 Answers/40230212013/Graphical Login Page/bin/App.class
 create mode 100644 Answers/40230212013/Graphical Login Page/bin/LoginGUI$1.class
 create mode 100644 Answers/40230212013/Graphical Login Page/bin/LoginGUI$2.class
 create mode 100644 Answers/40230212013/Graphical Login Page/bin/LoginGUI.class
 create mode 100644 Answers/40230212013/Graphical Login Page/src/App.class
 create mode 100644 Answers/40230212013/Graphical Login Page/src/App.java
 create mode 100644 Answers/40230212013/Graphical Login Page/src/LoginGUI$1.class
 create mode 100644 Answers/40230212013/Graphical Login Page/src/LoginGUI$2.class
 create mode 100644 Answers/40230212013/Graphical Login Page/src/LoginGUI.class
 create mode 100644 Answers/40230212013/Graphical Login Page/src/LoginGUI.java
 create mode 100644 Answers/40230212013/Graphical Login Page/users.txt

diff --git a/Answers/40230212013/Graphical Login Page/.vscode/settings.json b/Answers/40230212013/Graphical Login Page/.vscode/settings.json
new file mode 100644
index 0000000..e112a70
--- /dev/null
+++ b/Answers/40230212013/Graphical Login Page/.vscode/settings.json	
@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}
diff --git a/Answers/40230212013/Graphical Login Page/README.md b/Answers/40230212013/Graphical Login Page/README.md
new file mode 100644
index 0000000..7c03a53
--- /dev/null
+++ b/Answers/40230212013/Graphical Login Page/README.md	
@@ -0,0 +1,18 @@
+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).
diff --git a/Answers/40230212013/Graphical Login Page/bin/App.class b/Answers/40230212013/Graphical Login Page/bin/App.class
new file mode 100644
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diff --git a/Answers/40230212013/Graphical Login Page/bin/LoginGUI.class b/Answers/40230212013/Graphical Login Page/bin/LoginGUI.class
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diff --git a/Answers/40230212013/Graphical Login Page/bin/UserStore.class b/Answers/40230212013/Graphical Login Page/bin/UserStore.class
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diff --git a/Answers/40230212013/Graphical Login Page/src/App.class b/Answers/40230212013/Graphical Login Page/src/App.class
new file mode 100644
index 0000000000000000000000000000000000000000..2780705ca8b9155436af0d6d9256f08707bf9872
GIT binary patch
literal 321
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literal 0
HcmV?d00001

diff --git a/Answers/40230212013/Graphical Login Page/src/App.java b/Answers/40230212013/Graphical Login Page/src/App.java
new file mode 100644
index 0000000..476fe42
--- /dev/null
+++ b/Answers/40230212013/Graphical Login Page/src/App.java	
@@ -0,0 +1,6 @@
+public class App {
+    public static void main(String[] args) {
+        LoginGUI loginGUI = new LoginGUI();
+        loginGUI.setVisible(true);
+    }
+}
diff --git a/Answers/40230212013/Graphical Login Page/src/EmailValidator.java b/Answers/40230212013/Graphical Login Page/src/EmailValidator.java
index 5a94493..1bdf807 100644
--- a/Answers/40230212013/Graphical Login Page/src/EmailValidator.java	
+++ b/Answers/40230212013/Graphical Login Page/src/EmailValidator.java	
@@ -1,9 +1,11 @@
 import java.util.regex.Pattern;
 
 public class EmailValidator {
-  private static final Pattern emailpat = Pattern.compile("[^A-Za-z0-9.-]+@[A-Za-z0-9.-]+$");
-  public static boolean isValid(String email)
-  {
-    return emailpat.matcher(email).matches();
-  }
-}
+    private static final Pattern EMAIL_PATTERN = Pattern.compile(
+            "^[A-Za-z0-9+_.-]+@[A-Za-z0-9.-]+$"
+    );
+
+    public static boolean isValid(String email) {
+        return EMAIL_PATTERN.matcher(email).matches();
+    }
+}
\ No newline at end of file
diff --git a/Answers/40230212013/Graphical Login Page/src/LoginGUI$1.class b/Answers/40230212013/Graphical Login Page/src/LoginGUI$1.class
new file mode 100644
index 0000000000000000000000000000000000000000..842ede368ba8cecc7eec488b71a57a21934679cb
GIT binary patch
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literal 0
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diff --git a/Answers/40230212013/Graphical Login Page/src/LoginGUI$2.class b/Answers/40230212013/Graphical Login Page/src/LoginGUI$2.class
new file mode 100644
index 0000000000000000000000000000000000000000..1b47739b4bf4da396ea8ee1993fe2a079722e5e1
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literal 0
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diff --git a/Answers/40230212013/Graphical Login Page/src/LoginGUI.class b/Answers/40230212013/Graphical Login Page/src/LoginGUI.class
new file mode 100644
index 0000000000000000000000000000000000000000..d0f20150509f90c46d2694957e0c3651c11b4860
GIT binary patch
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diff --git a/Answers/40230212013/Graphical Login Page/src/LoginGUI.java b/Answers/40230212013/Graphical Login Page/src/LoginGUI.java
new file mode 100644
index 0000000..3e4b889
--- /dev/null
+++ b/Answers/40230212013/Graphical Login Page/src/LoginGUI.java	
@@ -0,0 +1,85 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+public class LoginGUI extends JFrame{
+  private JTextField usernameField;
+  private JPasswordField passwordField;
+  private JTextField emailField;
+  private JLabel message;
+  private UserStore userStore;
+
+  public LoginGUI()
+  {
+
+    setTitle("Login and Registration");
+    setSize(400, 300);    userStore = new UserStore();
+    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    setLocationRelativeTo(null);
+    JPanel panel = new JPanel(new GridLayout(7, 1));
+    usernameField = new JTextField();
+    passwordField = new JPasswordField();
+    emailField = new JTextField();
+    message = new JLabel();
+    JButton login = new JButton("Login");
+    JButton register = new JButton("Register");
+    
+    panel.add(new JLabel("Username:"));
+    panel.add(usernameField);
+    panel.add(new JLabel("Password:"));
+    panel.add(passwordField);
+    panel.add(new JLabel("Email:"));
+    panel.add(emailField);
+    panel.add(message);
+    panel.add(login);
+    panel.add(register);
+    add(panel);
+
+    login.addActionListener(new ActionListener() {
+      @Override
+      public void actionPerformed(ActionEvent e)
+      {
+        String username = usernameField.getText();
+        String password = new String(passwordField.getPassword());
+        if(UserStore.login(username, password))
+        {
+          message.setText("Login successful");
+        }
+        else
+        {
+          message.setText("Invalid username or password.");
+        }
+      }
+    });
+    register.addActionListener(new ActionListener() {
+      @Override
+      public void actionPerformed(ActionEvent e)
+      {
+        String username = usernameField.getText();
+        String password = new String(passwordField.getPassword());
+        String email = emailField.getText();
+      if(!EmailValidator.isValid(email))
+      {
+        message.setText("Invalid Email format!");
+        return;
+      }
+      int passwordStrength = PasswordUtils.isStrong(password);
+      if (passwordStrength < 3) {
+          message.setText("Weak password. Strength level: " + passwordStrength);
+          return;
+      }
+
+      User user = new User(username, password, email);
+        if(UserStore.register(user))
+        {
+          message.setText("Register successful!");
+        }
+        else
+        {
+          message.setText("User exists!");
+        }
+      
+    }
+    });
+  }
+}
diff --git a/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java b/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java
index 34e9c59..19be82f 100644
--- a/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java	
+++ b/Answers/40230212013/Graphical Login Page/src/PasswordUtils.java	
@@ -5,7 +5,7 @@ public class PasswordUtils {
   private static final Pattern Lowercase = Pattern.compile("[a-z]");
   private static final Pattern Uppercase = Pattern.compile("[A-Z]");
   private static final Pattern Digit = Pattern.compile("\\d");
-  public static boolean isStrong(String password)
+  public static int isStrong(String password)
   {
     int strength = 0;
     if(password.length()<= 8)
@@ -28,7 +28,7 @@ public static boolean isStrong(String password)
     {
       strength++;
     }
-    if(specialChar)
+    if(special)
   {
     strength++;
   }
diff --git a/Answers/40230212013/Graphical Login Page/src/UserStore.java b/Answers/40230212013/Graphical Login Page/src/UserStore.java
index 0e87cd9..ad89c47 100644
--- a/Answers/40230212013/Graphical Login Page/src/UserStore.java	
+++ b/Answers/40230212013/Graphical Login Page/src/UserStore.java	
@@ -8,7 +8,7 @@ public UserStore()
   {
     loadUsers();
   }
-  public boolean register(User user)
+  public static boolean register(User user)
   {
     if(users.containsKey(user.getUsername()))
     {
@@ -18,7 +18,7 @@ public boolean register(User user)
     saveUsers();
     return true;
   }
-  public boolean login(String username, String password)
+  public static boolean login(String username, String password)
   {
     User user = users.get(username);
     if (user == null)
@@ -28,7 +28,7 @@ public boolean login(String username, String password)
     String hashPassword = User.hashPassword(password);
     return hashPassword.equals(user.getHashPassword());
   }
-  private void loadUers()
+  private void loadUsers()
   {
     try(BufferedReader bufr = new BufferedReader(new FileReader(file)))
     {
@@ -48,7 +48,7 @@ private void loadUers()
       e.printStackTrace();
     }
   }
-  private void saveUsers()
+  private static void saveUsers()
   {
   try(BufferedWriter bufw = new BufferedWriter(new FileWriter(file)))
   {
diff --git a/Answers/40230212013/Graphical Login Page/users.txt b/Answers/40230212013/Graphical Login Page/users.txt
new file mode 100644
index 0000000..7c657b2
--- /dev/null
+++ b/Answers/40230212013/Graphical Login Page/users.txt	
@@ -0,0 +1 @@
+navid,e9ff6b954d2c80dde0ac488c7962ae3604ff633770b130d8aea86b5c9482e5fe,navid@gmail.com