enhance quota support.

now includes:
- perOrg (users, dashboards, datasources, api_keys)
- perUser (orgs)
- global (users, orgs, dashboards, datasources, api_keys, sessions)

pkg/setting/setting_quota.go

@@ -1,17 +1,58 @@
 package setting
 
+type OrgQuota struct {
+	User       int64 `target:"org_user"`
+	DataSource int64 `target:"data_source"`
+	Dashboard  int64 `target:"dashboard"`
+	ApiKey     int64 `target:"api_key"`
+}
+
+type UserQuota struct {
+	Org int64 `target:"org_user"`
+}
+
+type GlobalQuota struct {
+	Org        int64 `target:"org"`
+	User       int64 `target:"user"`
+	DataSource int64 `target:"data_source"`
+	Dashboard  int64 `target:"dashboard"`
+	ApiKey     int64 `target:"api_key"`
+	Session    int64 `target:"-"`
+}
+
 type QuotaSettings struct {
 	Enabled bool
-	Default map[string]int64
+	Org     *OrgQuota
+	User    *UserQuota
+	Global  *GlobalQuota
 }
 
 func readQuotaSettings() {
 	// set global defaults.
-	DefaultQuotas := make(map[string]int64)
 	quota := Cfg.Section("quota")
 	Quota.Enabled = quota.Key("enabled").MustBool(false)
-	DefaultQuotas["user"] = quota.Key("user").MustInt64(10)
-	DefaultQuotas["data_source"] = quota.Key("data_source").MustInt64(10)
-	DefaultQuotas["dashboard"] = quota.Key("dashboard").MustInt64(10)
-	Quota.Default = DefaultQuotas
+
+	// per ORG Limits
+	Quota.Org = &OrgQuota{
+		User:       quota.Key("org_user").MustInt64(10),
+		DataSource: quota.Key("org_data_source").MustInt64(10),
+		Dashboard:  quota.Key("org_dashboard").MustInt64(10),
+		ApiKey:     quota.Key("org_api_key").MustInt64(10),
+	}
+
+	// per User limits
+	Quota.User = &UserQuota{
+		Org: quota.Key("user_org").MustInt64(10),
+	}
+
+	// Global Limits
+	Quota.Global = &GlobalQuota{
+		User:       quota.Key("global_user").MustInt64(-1),
+		Org:        quota.Key("global_org").MustInt64(-1),
+		DataSource: quota.Key("global_data_source").MustInt64(-1),
+		Dashboard:  quota.Key("global_dashboard").MustInt64(-1),
+		ApiKey:     quota.Key("global_api_key").MustInt64(-1),
+		Session:    quota.Key("global_session").MustInt64(-1),
+	}
+
 }