restructure repo

apps/db-handler/pkg/fileExists.go

@@ -0,0 +1,11 @@
+package pkg
+
+import (
+	"os"
+)
+
+// Checks if file on path exists or not
+func FileExists(path string) bool {
+	_, err := os.Stat(path)
+	return !os.IsNotExist(err)
+}

apps/db-handler/pkg/fileExists_test.go

@@ -0,0 +1,27 @@
+package pkg
+
+import (
+	"os"
+	"testing"
+)
+
+func TestFileExists(t *testing.T) {
+	// Create a temporary file for testing
+	file, err := os.CreateTemp("", "testfile")
+	if err != nil {
+		t.Fatalf("Failed to create temporary file: %v", err)
+	}
+	defer os.Remove(file.Name())
+
+	// Test with an existing file
+	exists := FileExists(file.Name())
+	if !exists {
+		t.Errorf("FileExists(%q) = false, want true", file.Name())
+	}
+
+	// Test with a non-existing file
+	exists = FileExists("non_existing_file.txt")
+	if exists {
+		t.Errorf("FileExists(%q) = true, want false", "non_existing_file.txt")
+	}
+}

apps/db-handler/pkg/gin/healthcheck/health_check.go

@@ -0,0 +1,54 @@
+package healthcheck
+
+import (
+	"net/http"
+	"sync"
+
+	"github.com/gin-gonic/gin"
+)
+
+type HealthCheck interface {
+	SetStatus(status string)
+	GetStatus() string
+	HealthCheckHandler() gin.HandlerFunc
+}
+
+type healthCheck struct {
+	status string
+	sync   sync.Mutex
+}
+
+func New() HealthCheck {
+	return &healthCheck{
+		status: "ok",
+	}
+}
+
+func (hc *healthCheck) SetStatus(status string) {
+	hc.sync.Lock()
+	defer hc.sync.Unlock()
+
+	hc.status = status
+}
+
+func (hc *healthCheck) GetStatus() string {
+	hc.sync.Lock()
+	defer hc.sync.Unlock()
+
+	return hc.status
+}
+
+func (hc *healthCheck) HealthCheckHandler() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		switch hc.GetStatus() {
+		case "nok":
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"status": hc.GetStatus(),
+			})
+		default:
+			c.JSON(http.StatusOK, gin.H{
+				"status": hc.GetStatus(),
+			})
+		}
+	}
+}

apps/db-handler/pkg/gin/healthcheck/health_check_test.go

@@ -0,0 +1,131 @@
+package healthcheck
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+)
+
+func TestHealthCheck_GetStatus(t *testing.T) {
+	var hc HealthCheck
+
+	type fields struct {
+		status string
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   string
+	}{
+		{
+			name: "Test GetStatus with status ok",
+			fields: fields{
+				status: "ok",
+			},
+			want: "ok",
+		},
+		{
+			name: "Test GetStatus with status nok",
+			fields: fields{
+				status: "nok",
+			},
+			want: "nok",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			hc = &healthCheck{
+				status: tt.fields.status,
+			}
+			if got := hc.GetStatus(); got != tt.want {
+				t.Errorf("HealthCheck.GetStatus() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestHealthCheck_SetStatus(t *testing.T) {
+	hc := New()
+
+	type args struct {
+		status string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "Test SetStatus with status ok",
+			args: args{
+				status: "ok",
+			},
+			want: "ok",
+		},
+		{
+			name: "Test SetStatus with status nok",
+			args: args{
+				status: "nok",
+			},
+			want: "nok",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			hc.SetStatus(tt.args.status)
+			if got := hc.GetStatus(); got != tt.want {
+				t.Errorf("HealthCheck.GetStatus() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestHealthCheck_HealthCheckHandler(t *testing.T) {
+	r := gin.Default()
+	hc := New()
+	r.GET("/health", hc.HealthCheckHandler())
+	type args struct {
+		status string
+	}
+	tests := []struct {
+		name       string
+		args       args
+		want       string
+		statusCode int
+	}{
+		{
+			name: "Test respond with status ok",
+			args: args{
+				status: "ok",
+			},
+			want:       `{"status":"ok"}`,
+			statusCode: http.StatusOK,
+		},
+		{
+			name: "Test respond with status nok",
+			args: args{
+				status: "nok",
+			},
+			want:       `{"status":"nok"}`,
+			statusCode: http.StatusInternalServerError,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			hc.SetStatus(tt.args.status)
+
+			w := httptest.NewRecorder()
+			req, _ := http.NewRequest("GET", "/health", nil)
+			r.ServeHTTP(w, req)
+
+			if got := w.Code; got != tt.statusCode {
+				t.Errorf("HealthCheck response status code = %v, want %v", got, tt.statusCode)
+			}
+			if got := w.Body.String(); got != tt.want {
+				t.Errorf("HealthCheck response = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

apps/db-handler/pkg/memgraph/create_person.go

@@ -0,0 +1,30 @@
+package memgraph
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+	"golang.org/x/net/context"
+)
+
+func (p *Person) CreatePerson(driver neo4j.DriverWithContext) (*neo4j.Record, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	if err := p.Verify(); err != nil {
+		return nil, err
+	}
+
+	query := fmt.Sprintf("CREATE (n:Person {%s}) RETURN n;", p.ToString())
+
+	result, err := session.Run(ctx, query, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return result.Single(ctx)
+}

apps/db-handler/pkg/memgraph/create_relationship.go

@@ -0,0 +1,39 @@
+package memgraph
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+	"golang.org/x/net/context"
+)
+
+func (r *Relationship) CreateRelationship(driver neo4j.DriverWithContext) (*neo4j.Record, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	if err := r.Verify(); err != nil {
+		return nil, err
+	}
+
+	query := fmt.Sprintf(`MATCH (a:Person), (b:Person) WHERE a.id = '%s' AND b.id = '%s'`, r.FirstPersonID, r.SecondPersonID)
+
+	if r.Direction == "->" {
+		query = fmt.Sprintf(`%s CREATE (a)-[r:%s {verified: false}]->(b) RETURN r;`, query, r.Relationship)
+	} else if r.Direction == "<-" {
+		query = fmt.Sprintf(`%s CREATE (a)<-[r:%s {verified: false}]-(b) RETURN r;`, query, r.Relationship)
+	} else {
+		query = fmt.Sprintf(`%s CREATE (a)<-[r1:%s {verified: True}]-(b) CREATE (a)-[r2:%s {verified: True}]->(b) RETURN r1, r2;`,
+			query, r.Relationship, r.Relationship)
+	}
+
+	result, err := session.Run(ctx, query, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return result.Single(ctx)
+}

apps/db-handler/pkg/memgraph/create_relationship_and_person.go

@@ -0,0 +1,45 @@
+package memgraph
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+	"golang.org/x/net/context"
+)
+
+func (rp *RelationshipAndPerson) CreateRelationshipAndPerson(driver neo4j.DriverWithContext) (*neo4j.Record, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	if err := rp.Verify(); err != nil {
+		return nil, err
+	}
+
+	rp.Person.ID = strings.ReplaceAll(uuid.New().String(), "-", "")
+
+	query := fmt.Sprintf(`MATCH (a:Person) WHERE a.id = '%s'`, rp.Relationship.FirstPersonID)
+
+	query = fmt.Sprintf("%s CREATE (b:Person {%s})", query, rp.Person.ToString())
+
+	if rp.Relationship.Direction == "->" {
+		query = fmt.Sprintf(`%s CREATE (a)-[r:%s {verified: True}]->(b) RETURN r;`, query, rp.Relationship.Relationship)
+	} else if rp.Relationship.Direction == "<-" {
+		query = fmt.Sprintf(`%s CREATE (a)<-[r:%s {verified: True}]-(b) RETURN r;`, query, rp.Relationship.Relationship)
+	} else {
+		query = fmt.Sprintf(`%s CREATE (a)<-[r1:%s {verified: True}]-(b) CREATE (a)-[r2:%s {verified: True}]->(b) RETURN r1, r2, b;`,
+			query, rp.Relationship.Relationship, rp.Relationship.Relationship)
+	}
+
+	result, err := session.Run(ctx, query, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return result.Single(ctx)
+}

apps/db-handler/pkg/memgraph/create_schema.go

@@ -0,0 +1,66 @@
+package memgraph
+
+import (
+	"time"
+
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+	"golang.org/x/net/context"
+)
+
+const dbCreateSchemaTimeout = 10 * time.Second
+
+func createIndexes(driver neo4j.DriverWithContext) error {
+	ctx, cancel := context.WithTimeout(context.Background(), dbCreateSchemaTimeout)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	indexes := []string{
+		`CREATE INDEX ON :Person(id);`,
+		`CREATE INDEX ON :Person(last_name);`,
+		`CREATE INDEX ON :Person(first_name);`,
+		`CREATE INDEX ON :Person(born);`,
+		`CREATE INDEX ON :Person(mothers_first_name);`,
+		`CREATE INDEX ON :Person(mothers_last_name);`,
+	}
+
+	// Run index queries via implicit auto-commit transaction
+	for _, index := range indexes {
+		_, err := session.Run(ctx, index, nil)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func createConstraints(driver neo4j.DriverWithContext) error {
+	ctx, cancel := context.WithTimeout(context.Background(), dbCreateSchemaTimeout)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	constraints := []string{
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.id);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.last_name);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.first_name);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.born);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.mothers_first_name);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.mothers_last_name);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT n.id IS UNIQUE;`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT n.last_name, n.first_name, n.born, n.mothers_first_name, n.mothers_last_name IS UNIQUE;`,
+	}
+
+	// Run index queries via implicit auto-commit transaction
+	for _, constraint := range constraints {
+		_, err := session.Run(ctx, constraint, nil)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

apps/db-handler/pkg/memgraph/cypher_verify_string.go

@@ -0,0 +1,124 @@
+package memgraph
+
+import (
+	"fmt"
+	"strings"
+)
+
+var cypherKeywords = []string{
+	"CREATE",
+	"DELETE",
+	"DETACH",
+	"DETACH DELETE",
+	"FOREACH",
+	"LOAD CSV",
+	"MERGE",
+	"MATCH",
+	"ON",
+	"OPTIONAL MATCH",
+	"REMOVE",
+	"SET",
+	"START",
+	"UNION",
+	"UNWIND",
+	"WITH",
+	"RETURN",
+	"ORDER BY",
+	"SKIP",
+	"LIMIT",
+	"ASC",
+	"DESC",
+	"EXISTS",
+	"CALL",
+	"USING",
+	"CONSTRAINT",
+	"DROP",
+	"INDEX",
+	"WHERE",
+}
+
+var cypherOperators = []string{
+	"+",
+	"-",
+	"*",
+	"/",
+	"%",
+	"^",
+	"=",
+	"<",
+	">",
+	"<=",
+	">=",
+	"<>",
+	"AND",
+	"OR",
+	"XOR",
+	"NOT",
+	"IN",
+	"STARTS WITH",
+	"ENDS WITH",
+	"CONTAINS",
+	"IS NULL",
+	"IS NOT NULL",
+	"IS UNIQUE",
+	"IS NODE",
+	"IS RELATIONSHIP",
+	"IS PROPERTY KEY",
+	"IS MAP",
+	"IS LIST",
+	"IS BOOLEAN",
+	"IS STRING",
+	"IS NUMBER",
+	"IS INTEGER",
+	"IS FLOAT",
+	"IS NODE",
+	"IS RELATIONSHIP",
+	"IS PATH",
+	"IS POINT",
+	"IS DATE",
+	"IS DURATION",
+}
+
+// cypherDelimiters contains the delimiters that need to be escaped in a string to prevent cypher injection keys are the delimiters that need to be escaped and values are the escaped delimiters
+var cypherDelimiters = map[string]string{
+	"'":       `\'`,
+	`"`:       `\"`,
+	`\u0027`:  `\\u0027`,
+	`\u0022`:  "\\\\u0022",
+	"`":       "``",
+	"\\u0060": "\\u0060\\u0060",
+}
+
+// VerifyString verifies if a string is valid and does not contain cypher injection
+func VerifyString(s string) error {
+	s = strings.ToUpper(s)
+	for _, keyword := range cypherKeywords {
+		if strings.Contains(s, keyword) {
+			return fmt.Errorf("invalid string: %s contains cypher keyword: %s", s, keyword)
+		}
+	}
+
+	for _, operator := range cypherOperators {
+		if strings.Contains(s, operator) {
+			return fmt.Errorf("invalid string: %s contains cypher operator: %s", s, operator)
+		}
+	}
+
+	for key := range cypherDelimiters {
+		if strings.Contains(s, key) {
+			return fmt.Errorf("invalid string: %s contains cypher delimiter: %s", s, key)
+		}
+	}
+
+	return nil
+}
+
+// EscapeString escapes delimiters in a string to prevent cypher injection
+func EscapeString(s string) string {
+	result := s
+	for k, v := range cypherDelimiters {
+		result = strings.ReplaceAll(result, k, v)
+	}
+
+	return result
+}

apps/db-handler/pkg/memgraph/delete_person.go

@@ -0,0 +1,27 @@
+package memgraph
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+	"golang.org/x/net/context"
+)
+
+func (p *Person) DeletePerson(driver neo4j.DriverWithContext) error {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	if err := p.Verify(); err != nil {
+		return err
+	}
+
+	query := fmt.Sprintf("MATCH (n:Person {id: '%s'}) DELETE n;", p.ID)
+
+	_, err := session.Run(ctx, query, nil)
+
+	return err
+}

apps/db-handler/pkg/memgraph/delete_relationship.go

@@ -0,0 +1,36 @@
+package memgraph
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+	"golang.org/x/net/context"
+)
+
+func (r *Relationship) DeleteRelationship(driver neo4j.DriverWithContext) error {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	if err := r.Verify(); err != nil {
+		return err
+	}
+
+	query := ""
+	if r.Direction == "->" {
+		query = fmt.Sprintf(`MATCH (a)-[r:%s]->(b)`, r.Relationship)
+	} else if r.Direction == "<-" {
+		query = fmt.Sprintf(`MATCH (a)<-[r:%s]-(b)`, r.Relationship)
+	} else {
+		query = fmt.Sprintf(`MATCH (a)-[r:%s]-(b)`, r.Relationship)
+	}
+
+	query = fmt.Sprintf(`%s WHERE a.id = '%s' AND b.id = '%s' DELETE r;`, query, r.FirstPersonID, r.SecondPersonID)
+
+	_, err := session.Run(ctx, query, nil)
+
+	return err
+}

apps/db-handler/pkg/memgraph/init_database.go

@@ -0,0 +1,32 @@
+package memgraph
+
+import (
+	"context"
+	"log"
+
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+)
+
+func InitDatabase(dbURI, dbUser, dbPassword string) neo4j.DriverWithContext {
+	driver, err := neo4j.NewDriverWithContext(dbURI, neo4j.BasicAuth(dbUser, dbPassword, ""))
+	if err != nil {
+		log.Panicln(err)
+	}
+
+	ctx := context.Background()
+
+	err = driver.VerifyConnectivity(ctx)
+	if err != nil {
+		log.Panicln(err)
+	}
+
+	if err := createIndexes(driver); err != nil {
+		log.Panicln(err)
+	}
+
+	if err := createConstraints(driver); err != nil {
+		log.Panicln(err)
+	}
+
+	return driver
+}

apps/db-handler/pkg/memgraph/model.go

@@ -0,0 +1,272 @@
+package memgraph
+
+import (
+	"fmt"
+	"time"
+)
+
+var RelationshipTypes = []string{
+	"Parent",
+	"Child",
+	"Spouse",
+	"Sibling",
+}
+
+type Person struct {
+	ID                  string              `json:"id"`
+	Firstname           string              `json:"first_name"`
+	Middlename          string              `json:"middle_name"`
+	Lastname            string              `json:"last_name"`
+	Titles              []string            `json:"titles"`   // e.g. Jr., Sr., III
+	Suffixes            []string            `json:"suffixes"` // e.g. Ph.D., M.D.
+	ExtraNames          []string            `json:"extra_names"`
+	Aliases             []string            `json:"aliases"`
+	MothersFirstname    string              `json:"mothers_first_name"`
+	MothersLastname     string              `json:"mothers_last_name"`
+	Born                time.Time           `json:"born"`
+	Birthplace          string              `json:"birthplace"`
+	Residence           string              `json:"residence"`
+	Death               time.Time           `json:"death"`
+	Deathplace          string              `json:"deathplace"`
+	LifeEvents          []map[string]string `json:"life_events"`
+	Occupations         []string            `json:"occupation"`
+	OccupationToDisplay string              `json:"occupation_to_display"`
+	OthersSaid          map[string]string   `json:"others_said"`
+	Photos              map[string]string   `json:"photos"`
+	ProfilePicture      string              `json:"profile_picture"`
+	verified            bool
+}
+
+func (p *Person) ToString() string {
+	result := fmt.Sprintf("id: '%s'", p.ID)
+	if p.Firstname != "" {
+		result = fmt.Sprintf("%s, first_name: '%s'", result, p.Firstname)
+	}
+	if p.Lastname != "" {
+		result = fmt.Sprintf("%s, last_name: '%s'", result, p.Lastname)
+	}
+	if p.Middlename != "" {
+		result = fmt.Sprintf("%s, middle_name: '%s'", result, p.Middlename)
+	}
+	if p.MothersFirstname != "" {
+		result = fmt.Sprintf("%s, mothers_first_name: '%s'", result, p.MothersFirstname)
+	}
+	if p.MothersLastname != "" {
+		result = fmt.Sprintf("%s, mothers_last_name: '%s'", result, p.MothersLastname)
+	}
+	if !p.Born.IsZero() {
+		result = fmt.Sprintf("%s, born: date({year:%d, month:%d, day:%d})", result, p.Born.Year(), p.Born.Month(), p.Born.Day())
+	}
+	if !p.Death.IsZero() {
+		result = fmt.Sprintf("%s, death: date({year:%d, month:%d, day:%d})", result, p.Death.Year(), p.Death.Month(), p.Death.Day())
+	}
+	if p.Birthplace != "" {
+		result = fmt.Sprintf("%s, birthplace: '%s'", result, p.Birthplace)
+	}
+	if p.Residence != "" {
+		result = fmt.Sprintf("%s, residence: '%s'", result, p.Residence)
+	}
+	if p.Deathplace != "" {
+		result = fmt.Sprintf("%s, deathplace: '%s'", result, p.Deathplace)
+	}
+	if p.OccupationToDisplay != "" {
+		result = fmt.Sprintf("%s, occupation_to_display: '%s'", result, p.OccupationToDisplay)
+	}
+	if p.ProfilePicture != "" {
+		result = fmt.Sprintf("%s, profile_picture: '%s'", result, p.ProfilePicture)
+	}
+
+	if p.Titles != nil && len(p.Titles) > 0 {
+		result = fmt.Sprintf("%s, titles: [", result)
+		for _, title := range p.Titles {
+			result = fmt.Sprintf("%s'%s', ", result, title)
+		}
+		result = fmt.Sprintf("%s]", result[:len(result)-2])
+	}
+
+	if p.Suffixes != nil && len(p.Suffixes) > 0 {
+		result = fmt.Sprintf("%s, suffixes: [", result)
+		for _, suffix := range p.Suffixes {
+			result = fmt.Sprintf("%s'%s', ", result, suffix)
+		}
+		result = fmt.Sprintf("%s]", result[:len(result)-2])
+	}
+
+	if p.ExtraNames != nil && len(p.ExtraNames) > 0 {
+		result = fmt.Sprintf("%s, extra_names: [", result)
+		for _, extraName := range p.ExtraNames {
+			result = fmt.Sprintf("%s'%s', ", result, extraName)
+		}
+		result = fmt.Sprintf("%s]", result[:len(result)-2])
+	}
+
+	if p.Aliases != nil && len(p.Aliases) > 0 {
+		result = fmt.Sprintf("%s, aliases: [", result)
+		for _, alias := range p.Aliases {
+			result = fmt.Sprintf("%s'%s', ", result, alias)
+		}
+		result = fmt.Sprintf("%s]", result[:len(result)-2])
+	}
+
+	if p.LifeEvents != nil && len(p.LifeEvents) > 0 {
+		result = fmt.Sprintf("%s, life_events: [", result)
+		for i := 0; i < len(p.LifeEvents); i++ {
+			date, dok := p.LifeEvents[i]["date"]
+			event, eok := p.LifeEvents[i]["event"]
+			if dok && eok {
+				result = fmt.Sprintf("%s{date: '%s', event: '%s'}, ", result, date, event)
+			}
+		}
+		result = fmt.Sprintf("%s]", result[:len(result)-2])
+	}
+
+	if p.Occupations != nil && len(p.Occupations) > 0 {
+		result = fmt.Sprintf("%s, occupations: [", result)
+
+		for _, occupation := range p.Occupations {
+			result = fmt.Sprintf("%s'%s', ", result, occupation)
+		}
+
+		result = fmt.Sprintf("%s]", result[:len(result)-2])
+	}
+
+	if p.OthersSaid != nil {
+		result = fmt.Sprintf("%s, others_said: {", result)
+		for key, value := range p.OthersSaid {
+			result = fmt.Sprintf("%s%s: '%s', ", result, key, value)
+		}
+		result = fmt.Sprintf("%s}", result[:len(result)-2])
+	}
+
+	if p.Photos != nil && len(p.Photos) > 0 {
+		result = fmt.Sprintf("%s, photos: {", result)
+		for key, value := range p.Photos {
+			result = fmt.Sprintf("%s%s: '%s', ", result, key, value)
+		}
+		result = fmt.Sprintf("%s}", result[:len(result)-2])
+	}
+
+	return result
+}
+
+// Verify checks if the person is valid and does not contain cypher injection it also escapes the delimiters contained in any of the strings
+func (p *Person) Verify() error {
+	if p.verified {
+		return nil
+	}
+	if err := VerifyString(p.ID); err != nil {
+		return fmt.Errorf("invalid ID type %s", err)
+	}
+
+	p.Firstname = EscapeString(p.Firstname)
+	p.Middlename = EscapeString(p.Middlename)
+	p.Lastname = EscapeString(p.Lastname)
+	p.MothersFirstname = EscapeString(p.MothersFirstname)
+	p.MothersLastname = EscapeString(p.MothersLastname)
+	p.Birthplace = EscapeString(p.Birthplace)
+	p.Residence = EscapeString(p.Residence)
+	p.Deathplace = EscapeString(p.Deathplace)
+	p.OccupationToDisplay = EscapeString(p.OccupationToDisplay)
+	p.ProfilePicture = EscapeString(p.ProfilePicture)
+
+	for i, title := range p.Titles {
+		p.Titles[i] = EscapeString(title)
+	}
+
+	for i, suffix := range p.Suffixes {
+		p.Suffixes[i] = EscapeString(suffix)
+	}
+
+	for i, extraName := range p.ExtraNames {
+		p.ExtraNames[i] = EscapeString(extraName)
+	}
+
+	for i, alias := range p.Aliases {
+		p.Aliases[i] = EscapeString(alias)
+	}
+
+	for i, lifeEvent := range p.LifeEvents {
+		for key, value := range lifeEvent {
+			if key != "date" && key != "event" {
+				return fmt.Errorf("invalid key in life event")
+			}
+			p.LifeEvents[i][key] = EscapeString(value)
+		}
+	}
+
+	for i, occupation := range p.Occupations {
+		p.Occupations[i] = EscapeString(occupation)
+	}
+
+	for key, value := range p.OthersSaid {
+		if err := VerifyString(key); err != nil {
+			return fmt.Errorf("invalid key in others said %s", err)
+		}
+		p.OthersSaid[key] = EscapeString(value)
+	}
+
+	for key, value := range p.Photos {
+		if err := VerifyString(key); err != nil {
+			return fmt.Errorf("invalid key in photos %s", err)
+		}
+		p.Photos[key] = EscapeString(value)
+	}
+
+	p.verified = true
+
+	return nil
+}
+
+type Relationship struct {
+	FirstPersonID  string `json:"first_person_id"`
+	SecondPersonID string `json:"second_person_id"`
+	Relationship   string `json:"relationship"`
+	Direction      string `json:"direction"`
+}
+
+// Verify checks if the relationship is valid and does not contain cypher injection
+func (r *Relationship) Verify() error {
+	if r.Direction != "->" && r.Direction != "<-" && r.Direction != "-" {
+		return fmt.Errorf("invalid direction for relationship")
+	}
+
+	// Check if the relationship is in the list of valid relationships
+	found := false
+	for _, relationship := range RelationshipTypes {
+		if r.Relationship == relationship {
+			found = true
+
+			break
+		}
+	}
+	if !found {
+		return fmt.Errorf("invalid relationship type")
+	}
+
+	if err := VerifyString(r.FirstPersonID); err != nil {
+		return fmt.Errorf("invalid FirstPersonID type %s", err)
+	}
+
+	if err := VerifyString(r.SecondPersonID); err != nil {
+		return fmt.Errorf("invalid SecondPersonID type %s", err)
+	}
+
+	return nil
+}
+
+type RelationshipAndPerson struct {
+	Relationship Relationship `json:"relationship"`
+	Person       Person       `json:"person"`
+}
+
+func (r *RelationshipAndPerson) Verify() error {
+	if err := r.Relationship.Verify(); err != nil {
+		return err
+	}
+
+	if err := r.Person.Verify(); err != nil {
+		return err
+	}
+
+	return nil
+}

apps/db-handler/pkg/memgraph/model_test.go

@@ -0,0 +1,77 @@
+package memgraph
+
+import (
+	"testing"
+	"time"
+)
+
+func TestPerson_ToString(t *testing.T) {
+	tests := []struct {
+		name string
+		p    *Person
+		want string
+	}{
+		{
+			name: "Test with nil values",
+			p: &Person{
+				ID:               "1",
+				Firstname:        "John",
+				Lastname:         "Doe",
+				MothersFirstname: "Jane",
+				MothersLastname:  "Doe",
+				Born:             time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				Birthplace:       "New York",
+				Residence:        "New York",
+				Death:            time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				Deathplace:       "New York",
+			},
+			want: "ID: '1', Firstname: 'John', Lastname: 'Doe', MothersFirstname: 'Jane', MothersLastname: 'Doe', Born: date({year:2021, month:1, day:1}), Death: date({year:2021, month:1, day:1}), Birthplace: 'New York', Residence: 'New York', Deathplace: 'New York', OccupationToDisplay: '', ProfilePicture: ''",
+		}, {
+			name: "Test with All values",
+			p: &Person{
+				ID:               "1",
+				Firstname:        "John",
+				Lastname:         "Doe",
+				MothersFirstname: "Jane",
+				MothersLastname:  "Doe",
+				Born:             time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				Birthplace:       "New York",
+				Residence:        "New York",
+				Death:            time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+				Deathplace:       "New York",
+				LifeEvents: []map[string]string{
+					{
+						"date":  "2021-01-01",
+						"event": "Event 1",
+					},
+					{
+						"date":  "2021-01-02",
+						"event": "Event 2",
+					},
+				},
+				Occupations: []string{
+					"Welder",
+					"Plumber",
+				},
+				OccupationToDisplay: "Welder",
+				OthersSaid: map[string]string{
+					"Beni": "He is a good person",
+					"Jani": "He is a bad person",
+				},
+				Photos: map[string]string{
+					"Profile": "profile.jpg",
+					"Family":  "family.jpg",
+				},
+				ProfilePicture: "profile.jpg",
+			},
+			want: "ID: '1', Firstname: 'John', Lastname: 'Doe', MothersFirstname: 'Jane', MothersLastname: 'Doe', Born: date({year:2021, month:1, day:1}), Death: date({year:2021, month:1, day:1}), Birthplace: 'New York', Residence: 'New York', Deathplace: 'New York', OccupationToDisplay: 'Welder', ProfilePicture: 'profile.jpg', LifeEvents: [{date: '2021-01-01', event: 'Event 1'}, {date: '2021-01-02', event: 'Event 2'}], Occupations: ['Welder', 'Plumber'], OthersSaid: {Beni: 'He is a good person', Jani: 'He is a bad person'}, Photos: {Profile: 'profile.jpg', Family: 'family.jpg'}",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := tt.p.ToString(); got != tt.want {
+				t.Errorf("Person.ToString() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

apps/db-handler/pkg/memgraph/update_person.go

@@ -0,0 +1,30 @@
+package memgraph
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+	"golang.org/x/net/context"
+)
+
+func (p *Person) UpdatePerson(driver neo4j.DriverWithContext) (*neo4j.Record, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	if err := p.Verify(); err != nil {
+		return nil, err
+	}
+
+	query := fmt.Sprintf("MATCH (n:Person {id: '%s'}) SET n += {%s} RETURN n;", p.ID, p.ToString())
+
+	result, err := session.Run(ctx, query, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return result.Single(ctx)
+}

apps/db-handler/pkg/memgraph/verify_relationship.go

@@ -0,0 +1,39 @@
+package memgraph
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+	"golang.org/x/net/context"
+)
+
+func (r *Relationship) VerifyRelationship(driver neo4j.DriverWithContext) (*neo4j.Record, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	if err := r.Verify(); err != nil {
+		return nil, err
+	}
+
+	query := ""
+	if r.Direction == "->" {
+		query = fmt.Sprintf(`MATCH (a)-[r:%s]->(b)`, r.Relationship)
+	} else if r.Direction == "<-" {
+		query = fmt.Sprintf(`MATCH (a)<-[r:%s]-(b)`, r.Relationship)
+	} else {
+		query = fmt.Sprintf(`MATCH (a)-[r:%s]-(b)`, r.Relationship)
+	}
+
+	query = fmt.Sprintf(`%s WHERE a.id = %s AND b.id = %s set r.verified = true return r;`, query, r.FirstPersonID, r.SecondPersonID)
+
+	result, err := session.Run(ctx, query, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return result.Single(ctx)
+}

apps/db-handler/pkg/setup_https_server.go

@@ -0,0 +1,40 @@
+package pkg
+
+import (
+	"errors"
+	"log"
+	"net/http"
+	"time"
+)
+
+func SetupHttpsServer(router http.Handler, cert, key, httpsPort, httpPort string, requestTimeout time.Duration) (server *http.Server) {
+	if FileExists(cert) && FileExists(key) {
+		server = &http.Server{
+			Addr:         httpsPort,
+			Handler:      router,
+			ReadTimeout:  5 * time.Second,
+			WriteTimeout: 10 * time.Second,
+		}
+		go func() {
+			log.Println("Server starts at port ", httpsPort)
+			if err := server.ListenAndServeTLS(cert, key); err != nil && errors.Is(err, http.ErrServerClosed) {
+				log.Fatal(err)
+			}
+		}()
+	} else {
+		server = &http.Server{
+			Addr:         httpPort,
+			Handler:      router,
+			ReadTimeout:  requestTimeout * time.Second,
+			WriteTimeout: requestTimeout * time.Second,
+		}
+		go func() {
+			log.Println("Server starts at port ", httpPort)
+			if err := server.ListenAndServe(); err != nil && errors.Is(err, http.ErrServerClosed) {
+				log.Fatal(err)
+			}
+		}()
+	}
+
+	return server
+}

apps/db-handler/pkg/setup_logger.go

@@ -0,0 +1,29 @@
+package pkg
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+func SetupLogger(logToFileAndStd bool, logToFile bool) {
+	if logToFileAndStd || logToFile {
+		gin.DisableConsoleColor() // Disable Console Color, you don't need console color when writing the logs to file.
+		path := fmt.Sprintf("private/logs/%02dy_%02dm_%02dd_%02dh_%02dm_%02ds.log", time.Now().Year(), time.Now().Month(), time.Now().Day(), time.Now().Hour(), time.Now().Minute(), time.Now().Second())
+		logerror1 := os.MkdirAll("private/logs/", 0755)
+		f, logerror2 := os.Create(path)
+		if logerror1 != nil || logerror2 != nil {
+			log.Println("Cant log to file")
+		} else if logToFileAndStd {
+			gin.DefaultWriter = io.MultiWriter(f, os.Stdout)
+		} else {
+			gin.DefaultWriter = io.MultiWriter(f)
+		}
+	}
+	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
+	log.SetOutput(gin.DefaultErrorWriter)
+}