add builders and chaining methods for various types and variables for better reusability and readability

internal/models/issue.go

@@ -0,0 +1,64 @@
+package models
+
+type IssueBuilder struct {
+	ID          string
+	Title       string
+	Description string
+	Status      Status
+	IssueType   IssueType
+	Priority    int
+}
+
+func NewIssueBuilder() *IssueBuilder {
+	return &IssueBuilder{}
+}
+
+func NewBaseIssue() *IssueBuilder {
+	return NewIssueBuilder().
+		WithID("pm-abc").
+		WithTitle("Basic Issue").
+		WithDescription("Basic Description").
+		WithIssueType(TypeTask).
+		WithStatus(StatusOpen)
+}
+
+func (b *IssueBuilder) WithID(id string) *IssueBuilder {
+	b.ID = id
+	return b
+}
+
+func (b *IssueBuilder) WithTitle(title string) *IssueBuilder {
+	b.Title = title
+	return b
+}
+
+func (b *IssueBuilder) WithDescription(description string) *IssueBuilder {
+	b.Description = description
+	return b
+}
+
+func (b *IssueBuilder) WithStatus(status Status) *IssueBuilder {
+	b.Status = status
+	return b
+}
+
+func (b *IssueBuilder) WithIssueType(issueType IssueType) *IssueBuilder {
+	b.IssueType = issueType
+	return b
+}
+
+func (b *IssueBuilder) WithPriority(priority int) *IssueBuilder {
+	b.Priority = priority
+	return b
+}
+
+func (b IssueBuilder) Build() Issue {
+	return Issue{
+		ID:          b.ID,
+		Title:       b.Title,
+		Description: b.Description,
+		Status:      b.Status,
+		IssueType:   b.IssueType,
+		Priority:    b.Priority,
+	}
+}