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ZahirJS

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	<?xml version="1.0" encoding="UTF-8" standalone="no"?>
	<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
	"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
	<!-- Generated by graphviz version 2.43.0 (0)
	-->
	<!-- Title: %3 Pages: 1 -->
	<svg width="1786pt" height="1820pt"
	viewBox="0.00 0.00 1786.00 1820.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
	<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(36 1784)">
	<title>%3</title>
	<polygon fill="white" stroke="transparent" points="-36,36 -36,-1784 1750,-1784 1750,36 -36,36"/>
	<!-- Student -->
	<g id="node1" class="node">
	<title>Student</title>
	<path fill="#e8e8e8" stroke="transparent" d="M1081.5,-1514C1081.5,-1514 1319.5,-1514 1319.5,-1514 1325.5,-1514 1331.5,-1520 1331.5,-1526 1331.5,-1526 1331.5,-1732 1331.5,-1732 1331.5,-1738 1325.5,-1744 1319.5,-1744 1319.5,-1744 1081.5,-1744 1081.5,-1744 1075.5,-1744 1069.5,-1738 1069.5,-1732 1069.5,-1732 1069.5,-1526 1069.5,-1526 1069.5,-1520 1075.5,-1514 1081.5,-1514"/>
	<polygon fill="#bebebe" stroke="transparent" points="1070.5,-1721 1070.5,-1743 1330.5,-1743 1330.5,-1721 1070.5,-1721"/>
	<text text-anchor="start" x="1179.5" y="-1730.2" font-family="Arial" font-weight="bold" font-size="11.00">Student</text>
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	<polygon fill="#e8e8e8" stroke="transparent" points="1070.5,-1689 1070.5,-1711 1330.5,-1711 1330.5,-1689 1070.5,-1689"/>
	<text text-anchor="start" x="1075.5" y="-1697.2" font-family="Arial" font-size="11.00">- studentId : String</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1070.5,-1667 1070.5,-1689 1330.5,-1689 1330.5,-1667 1070.5,-1667"/>
	<text text-anchor="start" x="1075.5" y="-1675.2" font-family="Arial" font-size="11.00">+ username : String</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1070.5,-1645 1070.5,-1667 1330.5,-1667 1330.5,-1645 1070.5,-1645"/>
	<text text-anchor="start" x="1075.5" y="-1653.2" font-family="Arial" font-size="11.00">+ email : String</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1070.5,-1623 1070.5,-1645 1330.5,-1645 1330.5,-1623 1070.5,-1623"/>
	<text text-anchor="start" x="1075.5" y="-1631.2" font-family="Arial" font-size="11.00">+ enrollmentDate : Date</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1070.5,-1601 1070.5,-1623 1330.5,-1623 1330.5,-1601 1070.5,-1601"/>
	<text text-anchor="start" x="1075.5" y="-1609.2" font-family="Arial" font-size="11.00">+ currentLevel : String</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1070.5,-1591 1070.5,-1601 1330.5,-1601 1330.5,-1591 1070.5,-1591"/>
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	<text text-anchor="start" x="1075.5" y="-1567.2" font-family="Arial" font-size="11.00">+ Student(username: String, email: String) : Student</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1070.5,-1537 1070.5,-1559 1330.5,-1559 1330.5,-1537 1070.5,-1537"/>
	<text text-anchor="start" x="1075.5" y="-1545.2" font-family="Arial" font-size="11.00">+ enrollCourse(courseId: String) : boolean</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1070.5,-1515 1070.5,-1537 1330.5,-1537 1330.5,-1515 1070.5,-1515"/>
	<text text-anchor="start" x="1075.5" y="-1523.2" font-family="Arial" font-size="11.00">+ updateProgress(lessonId: String) : void</text>
	<polygon fill="black" stroke="black" points="1069.5,-1721 1069.5,-1721 1331.5,-1721 1331.5,-1721 1069.5,-1721"/>
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	</g>
	<!-- CourseEnrollment -->
	<g id="node2" class="node">
	<title>CourseEnrollment</title>
	<path fill="#e8e8e8" stroke="transparent" d="M268,-1212C268,-1212 617,-1212 617,-1212 623,-1212 629,-1218 629,-1224 629,-1224 629,-1408 629,-1408 629,-1414 623,-1420 617,-1420 617,-1420 268,-1420 268,-1420 262,-1420 256,-1414 256,-1408 256,-1408 256,-1224 256,-1224 256,-1218 262,-1212 268,-1212"/>
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	<text text-anchor="start" x="394.5" y="-1406.2" font-family="Arial" font-weight="bold" font-size="11.00">CourseEnrollment</text>
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	<polygon fill="#e8e8e8" stroke="transparent" points="257.5,-1365 257.5,-1387 628.5,-1387 628.5,-1365 257.5,-1365"/>
	<text text-anchor="start" x="262.5" y="-1373.2" font-family="Arial" font-size="11.00">- enrollmentId : String</text>
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	<text text-anchor="start" x="262.5" y="-1351.2" font-family="Arial" font-size="11.00">+ studentId : String</text>
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	<text text-anchor="start" x="262.5" y="-1329.2" font-family="Arial" font-size="11.00">+ courseId : String</text>
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	<text text-anchor="start" x="262.5" y="-1307.2" font-family="Arial" font-size="11.00">+ enrollmentDate : Date</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="257.5,-1277 257.5,-1299 628.5,-1299 628.5,-1277 257.5,-1277"/>
	<text text-anchor="start" x="262.5" y="-1285.2" font-family="Arial" font-size="11.00">+ progress : double</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="257.5,-1267 257.5,-1277 628.5,-1277 628.5,-1267 257.5,-1267"/>
	<polygon fill="#e8e8e8" stroke="transparent" points="257.5,-1257 257.5,-1267 628.5,-1267 628.5,-1257 257.5,-1257"/>
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	<text text-anchor="start" x="262.5" y="-1243.2" font-family="Arial" font-size="11.00">+ CourseEnrollment(studentId: String, courseId: String) : CourseEnrollment</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="257.5,-1213 257.5,-1235 628.5,-1235 628.5,-1213 257.5,-1213"/>
	<text text-anchor="start" x="262.5" y="-1221.2" font-family="Arial" font-size="11.00">+ calculateProgress() : double</text>
	<polygon fill="black" stroke="black" points="256.5,-1397 256.5,-1397 629.5,-1397 629.5,-1397 256.5,-1397"/>
	<polygon fill="black" stroke="black" points="256.5,-1267 256.5,-1267 629.5,-1267 629.5,-1267 256.5,-1267"/>
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	</g>
	<!-- Student->CourseEnrollment -->
	<g id="edge1" class="edge">
	<title>Student->CourseEnrollment</title>
	<path fill="none" stroke="#4a4a4a" d="M1061.47,-1589C842.64,-1589 442.5,-1589 442.5,-1589 442.5,-1589 442.5,-1434.29 442.5,-1434.29"/>
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	<text text-anchor="middle" x="440.5" y="-1427.09" font-family="Arial" font-size="9.00">*</text>
	<text text-anchor="middle" x="1058.47" y="-1591.8" font-family="Arial" font-size="9.00">1</text>
	</g>
	<!-- WatchProgress -->
	<g id="node7" class="node">
	<title>WatchProgress</title>
	<path fill="#e8e8e8" stroke="transparent" d="M1168.5,-15C1168.5,-15 1484.5,-15 1484.5,-15 1490.5,-15 1496.5,-21 1496.5,-27 1496.5,-27 1496.5,-189 1496.5,-189 1496.5,-195 1490.5,-201 1484.5,-201 1484.5,-201 1168.5,-201 1168.5,-201 1162.5,-201 1156.5,-195 1156.5,-189 1156.5,-189 1156.5,-27 1156.5,-27 1156.5,-21 1162.5,-15 1168.5,-15"/>
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	<text text-anchor="start" x="1286" y="-187.2" font-family="Arial" font-weight="bold" font-size="11.00">WatchProgress</text>
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	<text text-anchor="start" x="1162.5" y="-154.2" font-family="Arial" font-size="11.00">- progressId : String</text>
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	<text text-anchor="start" x="1162.5" y="-132.2" font-family="Arial" font-size="11.00">+ studentId : String</text>
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	<text text-anchor="start" x="1162.5" y="-110.2" font-family="Arial" font-size="11.00">+ videoId : String</text>
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	<text text-anchor="start" x="1162.5" y="-88.2" font-family="Arial" font-size="11.00">+ watchedMinutes : int</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1157.5,-70 1157.5,-80 1495.5,-80 1495.5,-70 1157.5,-70"/>
	<polygon fill="#e8e8e8" stroke="transparent" points="1157.5,-60 1157.5,-70 1495.5,-70 1495.5,-60 1157.5,-60"/>
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	<text text-anchor="start" x="1162.5" y="-46.2" font-family="Arial" font-size="11.00">+ WatchProgress(studentId: String, videoId: String) : WatchProgress</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1157.5,-16 1157.5,-38 1495.5,-38 1495.5,-16 1157.5,-16"/>
	<text text-anchor="start" x="1162.5" y="-24.2" font-family="Arial" font-size="11.00">+ updateProgress(minutes: int) : void</text>
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	<polygon fill="black" stroke="black" points="1156.5,-70 1156.5,-70 1496.5,-70 1496.5,-70 1156.5,-70"/>
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	<!-- Student->WatchProgress -->
	<g id="edge6" class="edge">
	<title>Student->WatchProgress</title>
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	<text text-anchor="middle" x="1384" y="-207.97" font-family="Arial" font-size="9.00">*</text>
	<text text-anchor="middle" x="1342.67" y="-1591.8" font-family="Arial" font-size="9.00">1</text>
	</g>
	<!-- QuizAttempt -->
	<g id="node10" class="node">
	<title>QuizAttempt</title>
	<path fill="#e8e8e8" stroke="transparent" d="M20,-4C20,-4 301,-4 301,-4 307,-4 313,-10 313,-16 313,-16 313,-200 313,-200 313,-206 307,-212 301,-212 301,-212 20,-212 20,-212 14,-212 8,-206 8,-200 8,-200 8,-16 8,-16 8,-10 14,-4 20,-4"/>
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	<text text-anchor="start" x="128" y="-198.2" font-family="Arial" font-weight="bold" font-size="11.00">QuizAttempt</text>
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	<text text-anchor="start" x="14.5" y="-165.2" font-family="Arial" font-size="11.00">- attemptId : String</text>
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	<text text-anchor="start" x="14.5" y="-143.2" font-family="Arial" font-size="11.00">+ studentId : String</text>
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	<text text-anchor="start" x="14.5" y="-121.2" font-family="Arial" font-size="11.00">+ quizId : String</text>
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	<text text-anchor="start" x="14.5" y="-99.2" font-family="Arial" font-size="11.00">+ score : int</text>
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	<text text-anchor="start" x="14.5" y="-77.2" font-family="Arial" font-size="11.00">+ attemptDate : Date</text>
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	<polygon fill="#e8e8e8" stroke="transparent" points="9.5,-49 9.5,-59 312.5,-59 312.5,-49 9.5,-49"/>
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	<text text-anchor="start" x="14.5" y="-35.2" font-family="Arial" font-size="11.00">+ QuizAttempt(studentId: String, quizId: String) : QuizAttempt</text>
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	<text text-anchor="start" x="14.5" y="-13.2" font-family="Arial" font-size="11.00">+ submitAnswer(questionId: String, answer: String) : void</text>
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	<!-- Student->QuizAttempt -->
	<g id="edge10" class="edge">
	<title>Student->QuizAttempt</title>
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	<text text-anchor="middle" x="122" y="-218.95" font-family="Arial" font-size="9.00">*</text>
	<text text-anchor="middle" x="1058.42" y="-1670.8" font-family="Arial" font-size="9.00">1</text>
	</g>
	<!-- Certificate -->
	<g id="node13" class="node">
	<title>Certificate</title>
	<path fill="#e8e8e8" stroke="transparent" d="M1064,-1212C1064,-1212 1337,-1212 1337,-1212 1343,-1212 1349,-1218 1349,-1224 1349,-1224 1349,-1408 1349,-1408 1349,-1414 1343,-1420 1337,-1420 1337,-1420 1064,-1420 1064,-1420 1058,-1420 1052,-1414 1052,-1408 1052,-1408 1052,-1224 1052,-1224 1052,-1218 1058,-1212 1064,-1212"/>
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	<text text-anchor="start" x="1173.5" y="-1406.2" font-family="Arial" font-weight="bold" font-size="11.00">Certificate</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1053.5,-1387 1053.5,-1397 1348.5,-1397 1348.5,-1387 1053.5,-1387"/>
	<polygon fill="#e8e8e8" stroke="transparent" points="1053.5,-1365 1053.5,-1387 1348.5,-1387 1348.5,-1365 1053.5,-1365"/>
	<text text-anchor="start" x="1058.5" y="-1373.2" font-family="Arial" font-size="11.00">- certificateId : String</text>
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	<text text-anchor="start" x="1058.5" y="-1351.2" font-family="Arial" font-size="11.00">+ studentId : String</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1053.5,-1321 1053.5,-1343 1348.5,-1343 1348.5,-1321 1053.5,-1321"/>
	<text text-anchor="start" x="1058.5" y="-1329.2" font-family="Arial" font-size="11.00">+ courseId : String</text>
	<polygon fill="#e8e8e8" stroke="transparent" points="1053.5,-1299 1053.5,-1321 1348.5,-1321 1348.5,-1299 1053.5,-1299"/>
	<text text-anchor="start" x="1058.5" y="-1307.2" font-family="Arial" font-size="11.00">+ issueDate : Date</text>
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	<text text-anchor="start" x="1058.5" y="-1285.2" font-family="Arial" font-size="11.00">+ grade : String</text>
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	<text text-anchor="start" x="1058.5" y="-1243.2" font-family="Arial" font-size="11.00">+ Certificate(studentId: String, courseId: String) : Certificate</text>
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	<text text-anchor="start" x="1058.5" y="-1221.2" font-family="Arial" font-size="11.00">+ generatePDF() : String</text>
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	<!-- Student->Certificate -->
	<g id="edge14" class="edge">
	<title>Student->Certificate</title>
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	<!-- Payment -->
	<g id="node14" class="node">
	<title>Payment</title>
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	<!-- Student->Payment -->
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	<title>Student->Payment</title>
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	<g id="node3" class="node">
	<title>Course</title>
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	<text text-anchor="start" x="753.5" y="-919.2" font-family="Arial" font-size="11.00">+ addLesson(lesson: Lesson) : void</text>
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	<!-- CourseEnrollment->Course -->
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	<title>CourseEnrollment->Course</title>
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	<!-- Lesson -->
	<g id="node5" class="node">
	<title>Lesson</title>
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	<!-- Course->Lesson -->
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	<title>Course->Lesson</title>
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	<!-- Discussion -->
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	<title>Discussion</title>
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	<!-- Course->Discussion -->
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	<title>Course->Discussion</title>
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	<!-- Instructor -->
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	<title>Instructor</title>
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	<text text-anchor="start" x="709.5" y="-1232.2" font-family="Arial" font-size="11.00">+ createCourse(title: String) : Course</text>
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	<title>Instructor->Course</title>
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	<!-- VideoContent -->
	<g id="node6" class="node">
	<title>VideoContent</title>
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	<!-- Lesson->VideoContent -->
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	<title>Lesson->VideoContent</title>
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	<title>Quiz</title>
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	<!-- Lesson->Quiz -->
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	<title>Lesson->Quiz</title>
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	<g id="edge7" class="edge">
	<title>VideoContent->WatchProgress</title>
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	<!-- Quiz->Question -->
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	<title>Quiz->Question</title>
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	<title>Quiz->QuizAttempt</title>
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	<title>Post</title>
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	<!-- Discussion->Post -->
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