Improved functions, fixed functions, refactoring

src/de/dhbw/contactdb/Besuch.java

@@ -1,63 +0,0 @@
-package de.dhbw.contactdb;
-
-import java.time.LocalDateTime;
-
-public class Besuch {
-    private LocalDateTime start;
-    private LocalDateTime end;
-    private Person person;
-    private Ort ort;
-
-    public Besuch(String s) {
-
-    }
-
-    public Besuch(LocalDateTime start, LocalDateTime end, Person person, Ort ort) {
-        this.start = start;
-        this.end = end;
-        this.person = person;
-        this.ort = ort;
-    }
-
-    public LocalDateTime getStart() {
-        return start;
-    }
-
-    public void setStart(LocalDateTime start) {
-        this.start = start;
-    }
-
-    public LocalDateTime getEnd() {
-        return end;
-    }
-
-    public void setEnd(LocalDateTime end) {
-        this.end = end;
-    }
-
-    public Person getPerson() {
-        return person;
-    }
-
-    public void setPerson(Person person) {
-        this.person = person;
-    }
-
-    public Ort getOrt() {
-        return ort;
-    }
-
-    public void setOrt(Ort ort) {
-        this.ort = ort;
-    }
-
-    @Override
-    public String toString() {
-        return "Besuch{" +
-                "start=" + start +
-                ", end=" + end +
-                ", person=" + person +
-                ", ort=" + ort +
-                '}';
-    }
-}

src/de/dhbw/contactdb/Main.java

@@ -4,103 +4,218 @@ import de.dhbw.contactdb.utils.Parser;
 
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.stream.Collectors;
 
-public class Main {
-    public static HashMap<Integer, Person> persons = new HashMap<>();
-    public static HashSet<Besuch> besuche = new HashSet<>();
-    public static HashMap<Integer, Ort> orte = new HashMap<>();
 
+/**
+ * Main class
+ *
+ * @author florian kaiser
+ * @version 1.0
+ * @since 21.06.2021
+ */
+public class Main {
+    /**
+     * Contains all persons from contacts2021.db
+     *
+     * @see de.dhbw.contactdb.utils.Parser
+     */
+    public static HashMap<Integer, Person> persons = new HashMap<>();
+
+
+    /**
+     * Contains all places from contacts2021.db
+     *
+     * @see de.dhbw.contactdb.utils.Parser
+     */
+    public static HashMap<Integer, Place> places = new HashMap<>();
+
+
+    /**
+     * Contains all visits from contacts2021.db
+     *
+     * @see de.dhbw.contactdb.utils.Parser
+     */
+    public static HashSet<Visit> visits = new HashSet<>();
+
+
+    /**
+     * Main function
+     *
+     * @param args String that contains program arguments
+     */
     public static void main(String[] args) {
         Parser.parse("/de/dhbw/contactdb/db/contacts2021.db");
 
         if (args.length == 1) {
             if (args[0].contains("--personensuche")) {
-                String s = args[0].split("=")[1].replaceAll("\"", "").toLowerCase();
+                searchForPerson(getSearchString(args[0]));
-
-                System.out.println("Personensuche: " + s);
-
-                persons.forEach((key, value) -> {
-                    if (value.getName().toLowerCase().contains(s)) {
-                        System.out.println(value);
-                    }
-                });
             } else if (args[0].contains("--ortssuche")) {
-                String s = args[0].split("=")[1].replaceAll("\"", "").toLowerCase();
+                searchForPlace(getSearchString(args[0]));
+            } else if (args[0].contains("--kontaktpersonen")) {
+                int id = Integer.parseInt(getSearchString(args[0]));
 
-                System.out.println("Ortssuche: " + s);
+                System.out.println(getContactPersons(id).stream()
+                        .filter(visit -> visit.getPerson().getId() != id)
+                        .map(visit -> visit.getPerson().getName())
+                        .sorted()
+                        .distinct()
+                        .collect(Collectors.joining(", ")));
+            } else if (args[0].contains("--besucher")) {
+                System.out.println(getVisitors(args[0]).stream()
+                        .map(visit -> visit.getPerson().getName())
+                        .sorted()
+                        .distinct()
+                        .collect(Collectors.joining(", ")));
+            } else {
+                argument_error();
+            }
+        } else {
+            argument_error();
+        }
+    }
 
-                orte.forEach((key, value) -> {
+
-                    if (value.getName().toLowerCase().contains(s)) {
+    /**
+     * Prints error message
+     *
+     * @author florian kaiser
+     */
+    private static void argument_error() {
+        System.out.println("Invalid parameter! \nUsage [Option]=\"[Value]\"\n--personensuche\n--ortssuche\n--kontaktpersonen\n--besucher");
+    }
+
+
+    /**
+     * Searches the HashMap places for a specific string
+     * @param search String that contains search value
+     *
+     * @author florian kaiser
+     */
+    public static void searchForPlace(String search) {
+        places.forEach((key, value) -> {
+            if (value.getName().toLowerCase().contains(search)) {
                 System.out.println(value);
             }
         });
-            } else if (args[0].contains("--kontaktpersonen")) {
-                int id = Integer.parseInt(args[0].split("=")[1].replaceAll("\"", ""));
-
-                System.out.println("Kontaktpersonen: " + id);
-
-                List<Person> kontaktpersonen = new ArrayList<>();
-                besuche.forEach(value -> {
-                    if (value.getPerson().getId() == id) {
-                        if(value.getOrt().isIndoor()) {
-                            besuche.forEach(besuch -> {
-                                if(besuch.getOrt().getId() == value.getOrt().getId()) {
-                                    if(!(besuch.getStart().isBefore(value.getStart()) && besuch.getEnd().isBefore(value.getStart())) && !besuch.getStart().isAfter(value.getEnd())) {
-                                        kontaktpersonen.add(besuch.getPerson());
     }
+
+
+    /**
+     * Searches the HashMap persons for a specific string
+     * @param search String that contains search value
+     *
+     * @author florian kaiser
+     */
+    public static void searchForPerson(String search) {
+        persons.forEach((key, value) -> {
+            if (value.getName().toLowerCase().contains(search)) {
+                System.out.println(value);
             }
         });
     }
+
+
+    /**
+     * Lists all persons that were at the same place at the same time as a specific person.
+     * Only if the place is indoor
+     *
+     * @param id Contains the id of a person
+     * @return List that contains visits
+     *
+     * @author florian kaiser
+     */
+    public static List<Visit> getContactPersons(int id) {
+        List<Visit> places_where_id_was_indoor;
+        places_where_id_was_indoor = visits.stream()
+                .filter(visit -> visit.getPlace().isIndoor())
+                .filter(visit -> visit.getPerson().getId() == id)
+                .toList();
+
+        List<Visit> contacts_of_id = new ArrayList<>();
+        for (Visit filtered_b : places_where_id_was_indoor) {
+            for (Visit b : visits) {
+                if (b.isOverlapping(filtered_b.getStart(), filtered_b.getEnd()) && filtered_b.getPlace().getId() == b.getPlace().getId()) {
+                    contacts_of_id.add(b);
+                }
+            }
         }
-                });
 
-                System.out.println(kontaktpersonen.stream()
+        return contacts_of_id;
-                        .map(Person::getName)
+    }
-                        .sorted()
-                        .collect(Collectors.joining(", ")));
 
-            } else if (args[0].contains("--besucher")) {
+
+    /**
+     * Lists all Persons that were at the same place (id) at the same time.
+     * If the place is indoor, the contact persons of each person is added to the result too.
+     *
+     * @param s contains program argument (id of place and date string, separated by comma)
+     * @return List that contains visits
+     *
+     * @author florian kaiser
+     */
+    public static List<Visit> getVisitors(String s) {
+        int id = Integer.parseInt(s.split("=")[1].split(",")[0].replaceAll("\"", ""));
+        LocalDateTime d;
+
+        try {
             DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss");
-                int id = Integer.parseInt(args[0].split("=")[1].split(",")[0].replaceAll("\"", ""));
+            d = LocalDateTime.parse(s.split("=")[1].split(",")[1].replaceAll("\"", ""), formatter);
-                LocalDateTime d = LocalDateTime.parse(args[0].split("=")[1].split(",")[1].replaceAll("\"", ""), formatter);
+        } catch (DateTimeParseException e1) {
-
+            try {
-                System.out.println("Besucher: " + id + " " + d);
+                DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm");
-
+                d = LocalDateTime.parse(s.split("=")[1].split(",")[1].replaceAll("\"", ""), formatter);
-                // TODO
+            } catch (DateTimeParseException e2) {
-                List<Person> kontaktpersonen = new ArrayList<>();
+                argument_error();
-                besuche.forEach(value -> {
+                System.exit(-2);
-                    if (value.getOrt().getId() == id) {
+                throw e1;
-                        if(value.getOrt().isIndoor()) {
-                            besuche.forEach(besuch -> {
-                                if(!(besuch.getStart().isBefore(value.getStart()) && besuch.getEnd().isBefore(value.getStart())) && !besuch.getStart().isAfter(value.getEnd())) {
-                                    kontaktpersonen.add(besuch.getPerson());
             }
-                            });
+        }
+
+        LocalDateTime finalD = d;
+        List<Visit> place_date_visits = visits.stream()
+                .filter(visit -> visit.getPlace().getId() == id)
+                .filter(visit -> visit.isInTimePeriod(finalD))
+                .toList();
+
+        List<Visit> all = new ArrayList<>();
+        for (Visit visit : place_date_visits) {
+            if (visit.getPlace().isIndoor()) {
+                all.addAll(getContactPersons(visit.getPerson().getId()));
             } else {
-                            // Outdoor
+                all.add(visit);
-                            // TODO
             }
         }
-                });
 
-                System.out.println(kontaktpersonen.stream()
+        return all;
-                        .map(Person::getName)
+    }
-                        .sorted()
-                        .collect(Collectors.joining(", ")));
 
-            } else {
+
-                System.out.println("Invalid paramater! \nUsage [Option]=\"[Value]\"\n--personensuche\n--ortsuche\n--kontaktpersonen\n--besucher");
+    /**
+     * Extracts string from String.
+     * Exits program if string is empty, blank or not available
+     *
+     * @param s Contains program argument
+     * @return extracted string
+     */
+    public static String getSearchString(String s) {
+        try {
+            s = s.split("=")[1].replaceAll("\"", "").toLowerCase();
+        } catch (ArrayIndexOutOfBoundsException e) {
+            argument_error();
+            System.exit(-1);
         }
-        } else {
+
-            System.out.println("Invalid paramater! \nUsage [Option]=\"[Value]\"\n--personensuche\n--ortsuche\n--kontaktpersonen\n--besucher");
+        if (s.isEmpty() || s.isBlank()) {
+            argument_error();
+            System.exit(-1);
         }
-//        persons.forEach((key, value) -> System.out.println(key + " " + value));
+
-//        besuche.forEach(System.out::println);
+        return s;
-//        orte.forEach((key, value) -> System.out.println(key + " " + value));
     }
 }

src/de/dhbw/contactdb/Ort.java

@@ -1,50 +0,0 @@
-package de.dhbw.contactdb;
-
-public class Ort {
-    private int id;
-    private String name;
-    private boolean indoor;
-
-    public Ort(String s) {
-
-    }
-
-    public Ort(int id, String name, boolean indoor) {
-        this.id = id;
-        this.name = name;
-        this.indoor = indoor;
-    }
-
-    public int getId() {
-        return id;
-    }
-
-    public void setId(int id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public boolean isIndoor() {
-        return indoor;
-    }
-
-    public void setIndoor(boolean indoor) {
-        this.indoor = indoor;
-    }
-
-    @Override
-    public String toString() {
-        return "Ort{" +
-                "id=" + id +
-                ", name='" + name + '\'' +
-                ", indoor=" + indoor +
-                '}';
-    }
-}

src/de/dhbw/contactdb/Person.java

@@ -1,34 +1,69 @@
 package de.dhbw.contactdb;
 
+
+/**
+ * Person
+ *
+ * @author florian kaiser
+ * @version 1.0
+ * @since 21.06.2021
+ */
 public class Person {
+    /**
+     * ID of person
+     */
     private int id;
+
+
+    /**
+     * Name of person
+     */
     private String name;
 
-    public Person(String s) {
-
-    }
 
+    /**
+     * Constructor
+     * @param id ID of person
+     * @param name Name of person
+     */
     public Person(int id, String name) {
         this.id = id;
         this.name = name;
     }
 
+
+    /**
+     * @return {@link #id}
+     */
     public int getId() {
         return id;
     }
 
+
+    /**
+     * @param id {@link #id}
+     */
     public void setId(int id) {
         this.id = id;
     }
 
+
+    /**
+     * @return {@link #name}
+     */
     public String getName() {
         return name;
     }
 
+
+    /**
+     * @param name {@link #name}
+     */
     public void setName(String name) {
         this.name = name;
     }
 
+
     @Override
     public String toString() {
         return "Person{" +

src/de/dhbw/contactdb/Place.java

@@ -0,0 +1,90 @@
+package de.dhbw.contactdb;
+
+
+/**
+ * Main class
+ *
+ * @author florian kaiser
+ * @version 1.0
+ * @since 21.06.2021
+ */
+public class Place {
+    /**
+     * ID of place
+     */
+    private int id;
+
+
+    /**
+     * name of place
+     */
+    private String name;
+
+
+    /**
+     * is place indoor
+     */
+    private final boolean indoor;
+
+
+    /**
+     * Constructor
+     * @param id ID of place
+     * @param name Name of place
+     * @param indoor is place indoor
+     */
+    public Place(int id, String name, boolean indoor) {
+        this.id = id;
+        this.name = name;
+        this.indoor = indoor;
+    }
+
+
+    /**
+     * @return {@link #id}
+     */
+    public int getId() {
+        return id;
+    }
+
+
+    /**
+     * @param id {@link #id}
+     */
+    public void setId(int id) {
+        this.id = id;
+    }
+
+
+    /**
+     * @return {@link #name}
+     */
+    public String getName() {
+        return name;
+    }
+
+
+    /**
+     * @param name {@link #name}
+     */
+    public void setName(String name) {
+        this.name = name;
+    }
+
+
+    /**
+     * @return {@link #indoor}
+     */
+    public boolean isIndoor() {
+        return indoor;
+    }
+
+    @Override
+    public String toString() {
+        return "Ort{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", indoor=" + indoor +
+                '}';
+    }
+}

src/de/dhbw/contactdb/Visit.java

@@ -0,0 +1,138 @@
+package de.dhbw.contactdb;
+
+import java.time.LocalDateTime;
+
+
+/**
+ * Main class
+ *
+ * @author florian kaiser
+ * @version 1.0
+ * @since 21.06.2021
+ */
+public class Visit {
+    /**
+     * start date of visit
+     */
+    private LocalDateTime start;
+
+
+    /**
+     * end date of visit
+     */
+    private LocalDateTime end;
+
+
+    /**
+     * person who visits
+     */
+    private Person person;
+
+
+    /**
+     * place where person is
+     */
+    private final Place place;
+
+
+    /**
+     * Constructor
+     * @param start start date of visit
+     * @param end end date of visit
+     * @param person person who visits
+     * @param place place where person is
+     */
+    public Visit(LocalDateTime start, LocalDateTime end, Person person, Place place) {
+        this.start = start;
+        this.end = end;
+        this.person = person;
+        this.place = place;
+    }
+
+
+    /**
+     * @return {@link #start}
+     */
+    public LocalDateTime getStart() {
+        return start;
+    }
+
+
+    /**
+     * @param start {@link #start}
+     */
+    public void setStart(LocalDateTime start) {
+        this.start = start;
+    }
+
+
+    /**
+     * @return {@link #end}
+     */
+    public LocalDateTime getEnd() {
+        return end;
+    }
+
+
+    /**
+     * @param end {@link #end}
+     */
+    public void setEnd(LocalDateTime end) {
+        this.end = end;
+    }
+
+
+    /**
+     * @return {@link #person}
+     */
+    public Person getPerson() {
+        return person;
+    }
+
+
+    /**
+     * @param person {@link #person}
+     */
+    public void setPerson(Person person) {
+        this.person = person;
+    }
+
+
+    /**
+     * @return {@link #place}
+     */
+    public Place getPlace() {
+        return place;
+    }
+
+
+    /**
+     * @param start Start of timespan
+     * @param end End of timespan
+     *
+     * @return boolean if timespan between start and end is overlapping timespan between this visits start and end
+     */
+    public boolean isOverlapping(LocalDateTime start, LocalDateTime end) {
+        return ((null == end) || this.start.isBefore(end)) && ((null == this.end) || start.isBefore(this.end));
+    }
+
+
+    /**
+     * @param inputTime time
+     *
+     * @return boolean if time is between this visits start and end
+     */
+    public boolean isInTimePeriod(LocalDateTime inputTime) {
+        return this.start.isBefore(inputTime) && this.end.isAfter(inputTime) || this.end.equals(inputTime) || this.start.equals(inputTime);
+    }
+
+    @Override
+    public String toString() {
+        return "Besuch{" +
+                "start=" + start +
+                ", end=" + end +
+                ", person=" + person +
+                ", ort=" + place +
+                '}';
+    }
+}

src/de/dhbw/contactdb/utils/Parser.java

@@ -1,8 +1,8 @@
 package de.dhbw.contactdb.utils;
 
-import de.dhbw.contactdb.Besuch;
+import de.dhbw.contactdb.Place;
+import de.dhbw.contactdb.Visit;
 import de.dhbw.contactdb.Main;
-import de.dhbw.contactdb.Ort;
 import de.dhbw.contactdb.Person;
 
 import java.io.BufferedReader;
@@ -11,41 +11,81 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
 
+
+/**
+ * Parser for parsing contacts2021.db
+ *
+ * @author florian kaiser
+ * @version 1.0
+ * @since 21.06.2021
+ */
 public class Parser {
+    /**
+     * Saves type of current line in database
+     */
     private static db_new_entity new_entity = null;
 
+
+    /**
+     * Parses contacts.db, creates objects of content and saves these objects in HashMaps
+     *
+     * @param filename Filename and path of contacts.db
+     */
     public static void parse(String filename) {
         InputStream db = Main.class.getResourceAsStream(filename);
 
         if(db == null) {
             System.err.println("Cannot find database!");
-            System.exit(-1);
+            System.exit(-3);
         }
 
         try (BufferedReader bf = new BufferedReader(new InputStreamReader(db))) {
             String line;
             while ((line = bf.readLine()) != null) {
                 if (line.toLowerCase().contains("new_entity")) {
-                    if (line.toLowerCase().contains("start_date")) new_entity = db_new_entity.BESUCH;
+                    if (line.toLowerCase().contains("start_date")) new_entity = db_new_entity.VISIT;
-                    else if (line.toLowerCase().contains("location_id")) new_entity = db_new_entity.ORT;
+                    else if (line.toLowerCase().contains("location_id")) new_entity = db_new_entity.PLACE;
                     else if (line.toLowerCase().contains("person_id")) new_entity = db_new_entity.PERSON;
 
                     continue;
                 }
 
-                if (new_entity == db_new_entity.BESUCH) {
+                if (new_entity == db_new_entity.VISIT) {
+                    LocalDateTime start = null;
+                    try {
                         DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss");
-                    LocalDateTime start = LocalDateTime.parse(line.split(",")[0].replaceAll("\"", ""), formatter);
+                        start = LocalDateTime.parse(line.split(",")[0].replaceAll("\"", ""), formatter);
-                    LocalDateTime end = LocalDateTime.parse(line.split(",")[1].replaceAll("\"", ""), formatter);
+                    } catch (DateTimeParseException e1) {
-                    Person p = Main.persons.get(Integer.parseInt(line.split(",")[2].replaceAll("\"", "")));
+                        try {
-                    Ort o = Main.orte.get(Integer.parseInt(line.split(",")[3].replaceAll("\"", "")));
+                            DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm");
-                    Main.besuche.add(new Besuch(start, end, p, o));
+                            start = LocalDateTime.parse(line.split(",")[0].replaceAll("\"", ""), formatter);
-                } else if (new_entity == db_new_entity.ORT) {
+                        } catch (DateTimeParseException e2) {
+                            System.exit(-1);
+                        }
+                    }
+
+                    LocalDateTime end = null;
+                    try {
+                        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss");
+                        end = LocalDateTime.parse(line.split(",")[1].replaceAll("\"", ""), formatter);
+                    } catch (DateTimeParseException e1) {
+                        try {
+                            DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm");
+                            end = LocalDateTime.parse(line.split(",")[1].replaceAll("\"", ""), formatter);
+                        } catch (DateTimeParseException e2) {
+                            System.exit(-1);
+                        }
+                    }
+                    Person person = Main.persons.get(Integer.parseInt(line.split(",")[2].replaceAll("\"", "")));
+                    Place place = Main.places.get(Integer.parseInt(line.split(",")[3].replaceAll("\"", "")));
+                    Main.visits.add(new Visit(start, end, person, place));
+                } else if (new_entity == db_new_entity.PLACE) {
                     int id = Integer.parseInt(line.split(",")[0].replaceAll("\"", ""));
                     String name = line.split(",")[1].replaceAll("\"", "");
                     boolean indoor = line.split(",")[2].replaceAll("\"", "").equals("in_door");
-                    Main.orte.put(id, new Ort(id, name, indoor));
+                    Main.places.put(id, new Place(id, name, indoor));
                 } else if (new_entity == db_new_entity.PERSON) {
                     int id = Integer.parseInt(line.split(",")[0].replaceAll("\"", ""));
                     String name = line.split(",")[1].replaceAll("\"", "");

src/de/dhbw/contactdb/utils/db_new_entity.java

@@ -1,5 +1,29 @@
 package de.dhbw.contactdb.utils;
 
+
+/**
+ * Used by Parser
+ *
+ * @author florian kaiser
+ * @version 1.0
+ * @since 21.06.2021
+ * @see de.dhbw.contactdb.utils.Parser
+ */
 public enum db_new_entity {
-    PERSON, ORT, BESUCH
+    /**
+     * Person
+     */
+    PERSON,
+
+
+    /**
+     * Place
+     */
+    PLACE,
+
+
+    /**
+     * Visit
+     */
+    VISIT
 }