Add CORS middleware and authentication middleware to the API server.

The `setupRouter` function in `main.go` now includes a CORS middleware and a token authentication middleware. The CORS middleware allows cross-origin resource sharing by setting the appropriate response headers. The token authentication middleware checks for the presence of an `Authorization` header with a valid bearer token. If the token is missing or invalid, an unauthorized response is returned.

In addition to these changes, a new test file `main_test.go` has been added to test the `/api/v1/auth` route. This test suite includes two test cases: one for successful authentication and one for failed authentication.

Update go.mod to include new dependencies.

The `go.mod` file has been modified to include two new dependencies: `github.com/spf13/viper` and `github.com/stretchr/testify`.

Ignore go.sum changes.

Ignore changes in the `go.sum` file, as they only include updates to existing dependencies.

1 files changed, 26 insertions, 0 deletions

diff --git a/api/internal/models/statistics.go b/api/internal/models/statistics.go
new file mode 100644
index 0000000..457e6a0
--- /dev/null
+++ b/api/internal/models/statistics.go
@@ -0,0 +1,26 @@
+package models
+
+import "time"
+
+type Statistic struct {
+        ID       int64     `json:"-"`
+        Date     time.Time `json:"date"`
+        User     User      `json:"user"`
+        Quantity int       `json:"quantity"`
+}
+
+type StatisticPost struct {
+        Date     time.Time `json:"date"`
+        Quantity int64     `json:"quantity"`
+        UserID   int64     `json:"user_id"`
+}
+
+type WeeklyStatistic struct {
+        Date  string `json:"date"`
+        Total int64  `json:"total"`
+}
+
+type DailyUserTotals struct {
+        Name  string `json:"name"`
+        Total int64  `json:"total"`
+}