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package loans
import (
"net/http"
"strconv"
"time"
"finance/backend/internal/database"
"finance/backend/internal/models"
"github.com/gin-gonic/gin"
"gorm.io/gorm"
)
// GetLoans returns all loans for the authenticated user
func GetLoans() gin.HandlerFunc {
return func(c *gin.Context) {
// Get user from context (set by auth middleware)
user, exists := c.Get("user")
if !exists {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
return
}
userObj := user.(models.User)
var loans []models.Loan
// Fetch all loans for the user
if err := database.DB.Where("user_id = ?", userObj.ID).Find(&loans).Error; err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch loans"})
return
}
c.JSON(http.StatusOK, gin.H{"loans": loans})
}
}
// GetLoanByID returns a specific loan by ID
func GetLoanByID() gin.HandlerFunc {
return func(c *gin.Context) {
// Get user from context (set by auth middleware)
user, exists := c.Get("user")
if !exists {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
return
}
userObj := user.(models.User)
// Get loan ID from URL parameter
loanID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid loan ID format"})
return
}
var loan models.Loan
// Fetch the loan and ensure it belongs to the authenticated user
if err := database.DB.Where("id = ? AND user_id = ?", loanID, userObj.ID).First(&loan).Error; err != nil {
if err == gorm.ErrRecordNotFound {
c.JSON(http.StatusNotFound, gin.H{"error": "Loan not found"})
} else {
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch loan"})
}
return
}
c.JSON(http.StatusOK, gin.H{"loan": loan})
}
}
// CreateLoan creates a new loan
func CreateLoan() gin.HandlerFunc {
return func(c *gin.Context) {
// Get user from context (set by auth middleware)
user, exists := c.Get("user")
if !exists {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
return
}
userObj := user.(models.User)
// Define a struct to bind the request JSON
var input struct {
Name string `json:"name" binding:"required"`
OriginalAmount int64 `json:"originalAmount" binding:"required"`
CurrentBalance int64 `json:"currentBalance" binding:"required"`
InterestRate float64 `json:"interestRate"`
StartDate string `json:"startDate" binding:"required"`
EndDate string `json:"endDate" binding:"required"`
AccountID *uint `json:"accountId"`
}
// Bind JSON to struct
if err := c.ShouldBindJSON(&input); err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
return
}
// Parse dates
startDate, err := time.Parse("2006-01-02", input.StartDate)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid start date format"})
return
}
endDate, err := time.Parse("2006-01-02", input.EndDate)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid end date format"})
return
}
// Create loan object
loan := models.Loan{
UserID: userObj.ID,
Name: input.Name,
OriginalAmount: input.OriginalAmount,
CurrentBalance: input.CurrentBalance,
InterestRate: input.InterestRate,
StartDate: startDate,
EndDate: endDate,
AccountID: input.AccountID,
}
// Save to database
if err := database.DB.Create(&loan).Error; err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create loan"})
return
}
c.JSON(http.StatusCreated, gin.H{"loan": loan})
}
}
// UpdateLoan updates an existing loan
func UpdateLoan() gin.HandlerFunc {
return func(c *gin.Context) {
// Get user from context (set by auth middleware)
user, exists := c.Get("user")
if !exists {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
return
}
userObj := user.(models.User)
// Get loan ID from URL parameter
loanID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid loan ID format"})
return
}
// Check if the loan exists and belongs to the user
var loan models.Loan
if err := database.DB.Where("id = ? AND user_id = ?", loanID, userObj.ID).First(&loan).Error; err != nil {
if err == gorm.ErrRecordNotFound {
c.JSON(http.StatusNotFound, gin.H{"error": "Loan not found"})
} else {
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch loan"})
}
return
}
// Define a struct to bind the request JSON
var input struct {
Name string `json:"name"`
CurrentBalance int64 `json:"currentBalance"`
InterestRate float64 `json:"interestRate"`
EndDate string `json:"endDate"`
AccountID *uint `json:"accountId"`
}
// Bind JSON to struct
if err := c.ShouldBindJSON(&input); err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
return
}
// Update fields if provided
if input.Name != "" {
loan.Name = input.Name
}
if input.CurrentBalance != 0 {
loan.CurrentBalance = input.CurrentBalance
}
if input.InterestRate != 0 {
loan.InterestRate = input.InterestRate
}
if input.EndDate != "" {
endDate, err := time.Parse("2006-01-02", input.EndDate)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid end date format"})
return
}
loan.EndDate = endDate
}
if input.AccountID != nil {
loan.AccountID = input.AccountID
}
// Save updates to database
if err := database.DB.Save(&loan).Error; err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update loan"})
return
}
c.JSON(http.StatusOK, gin.H{"loan": loan})
}
}
// DeleteLoan deletes a loan
func DeleteLoan() gin.HandlerFunc {
return func(c *gin.Context) {
// Get user from context (set by auth middleware)
user, exists := c.Get("user")
if !exists {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
return
}
userObj := user.(models.User)
// Get loan ID from URL parameter
loanID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid loan ID format"})
return
}
// Check if the loan exists and belongs to the user
var loan models.Loan
if err := database.DB.Where("id = ? AND user_id = ?", loanID, userObj.ID).First(&loan).Error; err != nil {
if err == gorm.ErrRecordNotFound {
c.JSON(http.StatusNotFound, gin.H{"error": "Loan not found"})
} else {
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch loan"})
}
return
}
// Delete the loan
if err := database.DB.Delete(&loan).Error; err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to delete loan"})
return
}
c.JSON(http.StatusOK, gin.H{"message": "Loan deleted successfully"})
}
}
|
