Implement "find" methods

src/main/java/BookBob/Main.java

@@ -42,6 +42,10 @@ public static void main(String[] args) {
                 }
                 break;
 
+            case "find":
+                commandHandler.find(input, records);
+                break;
+
             case "help":
                 commandHandler.help();
                 break;

src/main/java/BookBob/entity/Patient.java

@@ -5,36 +5,37 @@
 
 public class Patient {
     private String name;
-    private String NRIC;
-    private String diagnosis;
-    private ArrayList<String> medication;
-    private int phoneNumber;
+    private String nric;
     private String dateOfBirth;
+    private String phoneNumber;
     private String homeAddress;
+    private String diagnosis;
+    private List<String> medication;
 
-    //default constructor only takes in name and NRIC
-    public Patient(String name, String NRIC) {
+    // default constructor only takes in name and NRIC
+    public Patient(String name, String nric) {
         this.name = name;
-        this.NRIC = NRIC;
-        this.phoneNumber = 0;
+        this.nric = nric;
+        this.dateOfBirth = "";
+        this.phoneNumber = "";
         this.homeAddress = "";
-        this.medication = new ArrayList<>();
         this.diagnosis = "";
-        this.dateOfBirth = "";
+        this.medication = new ArrayList<>();
     }
 
-    //constructor used in retrieving data
-    public Patient(String name, String NRIC, String phoneNumber, String dateOfBirth, String homeAddress, String diagnosis, ArrayList<String> medications) {
+    // constructor used in retrieving data
+    public Patient(String name, String nric, String dateOfBirth, String phoneNumber, String homeAddress,
+                   String diagnosis, List<String> medications) {
         this.name = name;
-        this.NRIC = NRIC;
-        this.phoneNumber = Integer.parseInt(phoneNumber);
+        this.nric = nric;
         this.dateOfBirth = dateOfBirth;
+        this.phoneNumber = phoneNumber;
         this.homeAddress = homeAddress;
         this.diagnosis = diagnosis;
         this.medication = medications;
     }
 
-    //getters and setters
+    // getters and setters
     public String getName() {
         return name;
     }
@@ -43,51 +44,58 @@ public void setName(String name) {
         this.name = name;
     }
 
-    public String getNRIC() {
-        return NRIC;
+    public String getNric() {
+        return nric;
     }
 
-    public void setNRIC(String NRIC) {
-        this.NRIC = NRIC;
+    public void setNric(String nric) {
+        this.nric = nric;
     }
 
-    public String getDiagnosis() {
-        return diagnosis;
+    public String getDateOfBirth() {
+        return dateOfBirth;
     }
 
-    public void setDiagnosis(String diagnosis) {
-        this.diagnosis = diagnosis;
+    public void setDateOfBirth(String dateOfBirth) {
+        this.dateOfBirth = dateOfBirth;
     }
 
-    public ArrayList<String> getMedication() {
-        return medication;
+    public String getPhoneNumber() {
+        return phoneNumber;
     }
 
-    public void setMedication(ArrayList<String> medication) {
-        this.medication = medication;
+    public void setPhoneNumber(String phoneNumber) {
+        this.phoneNumber = phoneNumber;
     }
 
-    public int getPhoneNumber() {
-        return phoneNumber;
+    public String getHomeAddress() {
+        return homeAddress;
     }
 
-    public void setPhoneNumber(int phoneNumber) {
-        this.phoneNumber = phoneNumber;
+    public void setHomeAddress(String homeAddress) {
+        this.homeAddress = homeAddress;
     }
 
-    public String getDateOfBirth() {
-        return dateOfBirth;
+    public String getDiagnosis() {
+        return diagnosis;
     }
 
-    public void setDateOfBirth(String dateOfBirth) {
-        this.dateOfBirth = dateOfBirth;
+    public void setDiagnosis(String diagnosis) {
+        this.diagnosis = diagnosis;
     }
 
-    public String getHomeAddress() {
-        return homeAddress;
+    public List<String> getMedication() {
+        return medication;
     }
 
-    public void setHomeAddress(String homeAddress) {
-        this.homeAddress = homeAddress;
+    public void setMedication(List<String> medication) {
+        this.medication = medication;
+    }
+
+    @Override
+    public String toString() {
+        return "Name: " + getName() + ", NRIC: " + getNric() + ", DOB: " + getDateOfBirth() +
+                ", Phone: " + getPhoneNumber() + ", Address: " + getHomeAddress() +
+                ", Diagnosis: " + getDiagnosis() + ", Medication: " + getMedication();
     }
 }

src/main/java/BookBob/entity/Records.java

@@ -1,30 +1,27 @@
 package BookBob.entity;
 
 import java.util.ArrayList;
+import java.util.List;
 
 public class Records {
+    private List<Patient> patients;
 
-    public ArrayList<Patient> patients;
-
-    //default constructor: empty
+    // default constructor: empty
     public Records() {
-        ArrayList<Patient> patients = new ArrayList<>();
-        this.patients = patients;
+        this.patients = new ArrayList<>();
     }
 
-    //add a patient to records
+    // add a patient to records
     public void addPatient(Patient patient) {
-        ArrayList<Patient> patients = this.getPatients();
         patients.add(patient);
-        this.setPatients(patients);
     }
 
-    //setter and getters
-    public ArrayList<Patient> getPatients() {
+    // setter and getters
+    public List<Patient> getPatients() {
         return patients;
     }
 
-    public void setPatients(ArrayList<Patient> patients) {
+    public void setPatients(List<Patient> patients) {
         this.patients = patients;
     }
 }

src/main/java/BookBob/functions/CommandAttributeType.java

@@ -0,0 +1,21 @@
+package BookBob.functions;
+
+public enum CommandAttributeType {
+    NAME("NAME"),
+    NRIC("NRIC"),
+    DATE_OF_BIRTH("DATE_OF_BIRTH"),
+    PHONE_NUMBER("PHONE_NUMBER"),
+    HOME_ADDRESS("HOME_ADDRESS"),
+    DIAGNOSIS("DIAGNOSIS"),
+    MEDICATION("MEDICATION");
+
+    private final String label;
+
+    CommandAttributeType(String label) {
+        this.label = label;
+    }
+
+    public String getLabel() {
+        return label;
+    }
+}

src/main/java/BookBob/functions/CommandHandler.java

@@ -4,6 +4,7 @@
 import BookBob.entity.Records;
 
 import java.util.ArrayList;
+import java.util.List;
 
 public class CommandHandler {
 
@@ -43,19 +44,19 @@ public void add(String input, Records records) {
         String[] inputParts = input.split(" ");
         String name = "";
         String NRIC = "";
-        int phoneNumber = 0;
-        String diagnosis = "";
-        ArrayList<String> medications = new ArrayList<>();
-        String homeAddress = "";
         String dateOfBirth = "";
+        String phoneNumber = "";
+        String homeAddress = "";
+        String diagnosis = "";
+        List<String> medications = new ArrayList<>();
 
         for (String part : inputParts) {
             if (part.startsWith("n/")) {
                 name = part.substring(2);
             } else if (part.startsWith("ic/")) {
                 NRIC = part.substring(3);
             } else if (part.startsWith("p/")) {
-                phoneNumber = Integer.parseInt(part.substring(2));
+                phoneNumber = part.substring(2);
             } else if (part.startsWith("d/")) {
                 diagnosis = part.substring(2);
             } else if (part.startsWith("m/")) {
@@ -79,37 +80,68 @@ public void add(String input, Records records) {
     }
 
     public void list(Records records) {
-        ArrayList<Patient> patients = records.getPatients();
+        List<Patient> patients = records.getPatients();
         if (patients.isEmpty()) {
             System.out.println("No patients found.");
             return;
         }
         for (Patient patient : patients) {
-            System.out.println("Name: " + patient.getName() + ", NRIC: " + patient.getNRIC() +
+            System.out.println("Name: " + patient.getName() + ", NRIC: " + patient.getNric() +
                     ", Phone: " + patient.getPhoneNumber() + ", Diagnosis: " + patient.getDiagnosis() +
                     ", Medication: " + patient.getMedication() + ", Address: " + patient.getHomeAddress() +
                     ", DOB: " + patient.getDateOfBirth());
         }
     }
 
-    public void delete(String NRIC, Records records) {
-        ArrayList<Patient> patients = records.patients;
+    public void delete(String nric, Records records) {
+        List<Patient> patients = records.getPatients();
         int initialPatientSize = patients.size();
         if (initialPatientSize == 0) {
             System.out.println("There are no patients in the record currently.");
             return;
         }
         for (int i = 0; i < patients.size(); i++) {
             Patient currentPatient = patients.get(i);
-            String patientNRIC = currentPatient.getNRIC();
-            if (patientNRIC.equals(NRIC)) {
+            String patientNRIC = currentPatient.getNric();
+            if (patientNRIC.equals(nric)) {
                 patients.remove(i);
                 System.out.println("Patient " + currentPatient.getName() + ", " + patientNRIC + ", has been deleted.");
                 break;
             }
         }
         if (patients.size() == initialPatientSize) {
-            System.out.println("Patient " + NRIC + " not found");
+            System.out.println("Patient " + nric + " not found");
+        }
+    }
+
+    public void find(String input, Records records) {
+        String[] inputArr = input.split("\\s+", 3);
+
+        CommandAttributeType commandAttributeType = null;
+
+        for (CommandAttributeType t : CommandAttributeType.values()) {
+            if (t.getLabel().equals(inputArr[1])) {
+                commandAttributeType = t;
+                break;
+            }
+        }
+
+        if (commandAttributeType == null) {
+            System.out.println("Invalid find");
+            return;
+        }
+
+        String[] keywords = inputArr[2].split("\\s+");
+
+        List<Patient> findList = Find.findPatients(commandAttributeType, records, keywords);
+
+        if (findList.isEmpty()) {
+            System.out.println("No patients found");
+            return;
+        }
+
+        for (Patient patient : findList) {
+            System.out.println(patient);
         }
     }
 

src/main/java/BookBob/functions/Find.java

@@ -0,0 +1,78 @@
+package BookBob.functions;
+
+import BookBob.entity.Patient;
+import BookBob.entity.Records;
+
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Find {
+    public static List<Patient> findPatients(CommandAttributeType commandAttributeType,
+                                             Records records, String[] keywords) {
+        return switch (commandAttributeType) {
+        case NAME -> findPatientsByName(records, keywords);
+        case NRIC -> findPatientsByNric(records, keywords);
+        case DATE_OF_BIRTH -> findPatientsByDateOfBirth(records, keywords);
+        case PHONE_NUMBER -> findPatientsByPhoneNumber(records, keywords);
+        case HOME_ADDRESS -> findPatientsByHomeAddress(records, keywords);
+        case DIAGNOSIS -> findPatientsByDiagnosis(records, keywords);
+        case MEDICATION -> findPatientsByMedication(records, keywords);
+        };
+    }
+
+    public static List<Patient> findPatientsByName(Records records, String[] keywords) {
+        return findPatientsByAttribute(records, keywords, (p, keyword) ->
+                p.getName().toLowerCase().contains(keyword.toLowerCase()));
+    }
+
+    public static List<Patient> findPatientsByNric(Records records, String[] keywords) {
+        return findPatientsByAttribute(records, keywords, (p, keyword) ->
+                p.getNric().toLowerCase().contains(keyword.toLowerCase()));
+    }
+
+    public static List<Patient> findPatientsByDateOfBirth(Records records, String[] keywords) {
+        return findPatientsByAttribute(records, keywords, (p, keyword) -> {
+            DateTimeFormatter dateInputFormatter = DateTimeFormatter.ofPattern("ddMMyyyy");
+            LocalDate searchDate = LocalDate.parse(keyword, dateInputFormatter);
+            LocalDate patientDateOfBirth = LocalDate.parse(p.getDateOfBirth(), dateInputFormatter);
+            return patientDateOfBirth.equals(searchDate);
+        });
+    }
+
+    public static List<Patient> findPatientsByPhoneNumber(Records records, String[] keywords) {
+        return findPatientsByAttribute(records, keywords, (p, keyword) ->
+                p.getPhoneNumber().toLowerCase().contains(keyword.toLowerCase()));
+    }
+
+    public static List<Patient> findPatientsByHomeAddress(Records records, String[] keywords) {
+        return findPatientsByAttribute(records, keywords, (p, keyword) ->
+                p.getHomeAddress().toLowerCase().contains(keyword.toLowerCase()));
+    }
+
+    public static List<Patient> findPatientsByDiagnosis(Records records, String[] keywords) {
+        return findPatientsByAttribute(records, keywords, (p, keyword) ->
+                p.getDiagnosis().toLowerCase().contains(keyword.toLowerCase()));
+    }
+
+    public static List<Patient> findPatientsByMedication(Records records, String[] keywords) {
+        return findPatientsByAttribute(records, keywords, (p, keyword) -> p.getMedication().contains(keyword));
+    }
+
+    public static List<Patient> findPatientsByAttribute(Records records, String[] keywords,
+                                                        FindAttributeCheck attributeCheck) {
+        List<Patient> findList = new ArrayList<>();
+
+        for (Patient p : records.getPatients()) {
+            for (String keyword : keywords) {
+                if (attributeCheck.test(p, keyword)) {
+                    findList.add(p);
+                    break; // To avoid adding the same patient multiple times
+                }
+            }
+        }
+
+        return findList;
+    }
+}