public dashboards: move into into its own service (#51358)

This PR moves public dashboards into its own self contained service including API, Service, Database, and Models. Routes are mounted on the Grafana HTTPServer by the API service at injection time with wire.go. The main  route that loads the frontend for public dashboards is still handled by the API package.

Co-authored-by: Jesse Weaver <jesse.weaver@grafana.com>
Co-authored-by: Owen Smallwood <owen.smallwood@grafana.com>

pkg/services/publicdashboards/models/models_test.go

@@ -0,0 +1,57 @@
+package models
+
+import (
+	"testing"
+
+	"github.com/grafana/grafana/pkg/components/simplejson"
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPublicDashboardTableName(t *testing.T) {
+	assert.Equal(t, "dashboard_public", PublicDashboard{}.TableName())
+}
+
+func TestBuildTimeSettings(t *testing.T) {
+	var dashboardData = simplejson.NewFromAny(map[string]interface{}{"time": map[string]interface{}{"from": "now-8", "to": "now"}})
+	testCases := []struct {
+		name       string
+		dashboard  *models.Dashboard
+		pubdash    *PublicDashboard
+		timeResult *TimeSettings
+	}{
+		{
+			name:      "should use dashboard time if pubdash time empty",
+			dashboard: &models.Dashboard{Data: dashboardData},
+			pubdash:   &PublicDashboard{},
+			timeResult: &TimeSettings{
+				From: "now-8",
+				To:   "now",
+			},
+		},
+		{
+			name:      "should use dashboard time if pubdash to/from empty",
+			dashboard: &models.Dashboard{Data: dashboardData},
+			pubdash:   &PublicDashboard{},
+			timeResult: &TimeSettings{
+				From: "now-8",
+				To:   "now",
+			},
+		},
+		{
+			name:      "should use pubdash time",
+			dashboard: &models.Dashboard{Data: dashboardData},
+			pubdash:   &PublicDashboard{TimeSettings: simplejson.NewFromAny(map[string]interface{}{"from": "now-12", "to": "now"})},
+			timeResult: &TimeSettings{
+				From: "now-12",
+				To:   "now",
+			},
+		},
+	}
+
+	for _, test := range testCases {
+		t.Run(test.name, func(t *testing.T) {
+			assert.Equal(t, test.timeResult, test.pubdash.BuildTimeSettings(test.dashboard))
+		})
+	}
+}