1 files changed, 111 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/modules/dnsmasq_dhcp/charts.go b/src/go/collectors/go.d.plugin/modules/dnsmasq_dhcp/charts.go
new file mode 100644
index 000000000..39ac0024f
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/dnsmasq_dhcp/charts.go
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package dnsmasq_dhcp
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/netdata/netdata/go/go.d.plugin/agent/module"
+)
+
+const (
+	prioDHCPRangeUtilization = module.Priority + iota
+	prioDHCPRangeAllocatesLeases
+	prioDHCPRanges
+	prioDHCPHosts
+)
+
+var charts = module.Charts{
+	{
+		ID:       "dhcp_ranges",
+		Title:    "Number of DHCP Ranges",
+		Units:    "ranges",
+		Fam:      "dhcp ranges",
+		Ctx:      "dnsmasq_dhcp.dhcp_ranges",
+		Type:     module.Stacked,
+		Priority: prioDHCPRanges,
+		Dims: module.Dims{
+			{ID: "ipv4_dhcp_ranges", Name: "ipv4"},
+			{ID: "ipv6_dhcp_ranges", Name: "ipv6"},
+		},
+	},
+	{
+		ID:       "dhcp_hosts",
+		Title:    "Number of DHCP Hosts",
+		Units:    "hosts",
+		Fam:      "dhcp hosts",
+		Ctx:      "dnsmasq_dhcp.dhcp_host",
+		Type:     module.Stacked,
+		Priority: prioDHCPHosts,
+		Dims: module.Dims{
+			{ID: "ipv4_dhcp_hosts", Name: "ipv4"},
+			{ID: "ipv6_dhcp_hosts", Name: "ipv6"},
+		},
+	},
+}
+
+var (
+	chartsTmpl = module.Charts{
+		chartTmplDHCPRangeUtilization.Copy(),
+		chartTmplDHCPRangeAllocatedLeases.Copy(),
+	}
+)
+
+var (
+	chartTmplDHCPRangeUtilization = module.Chart{
+		ID:       "dhcp_range_%s_utilization",
+		Title:    "DHCP Range utilization",
+		Units:    "percentage",
+		Fam:      "dhcp range utilization",
+		Ctx:      "dnsmasq_dhcp.dhcp_range_utilization",
+		Type:     module.Area,
+		Priority: prioDHCPRangeUtilization,
+		Dims: module.Dims{
+			{ID: "dhcp_range_%s_utilization", Name: "used"},
+		},
+	}
+	chartTmplDHCPRangeAllocatedLeases = module.Chart{
+		ID:       "dhcp_range_%s_allocated_leases",
+		Title:    "DHCP Range Allocated Leases",
+		Units:    "leases",
+		Fam:      "dhcp range leases",
+		Ctx:      "dnsmasq_dhcp.dhcp_range_allocated_leases",
+		Priority: prioDHCPRangeAllocatesLeases,
+		Dims: module.Dims{
+			{ID: "dhcp_range_%s_allocated_leases", Name: "leases"},
+		},
+	}
+)
+
+func newDHCPRangeCharts(dhcpRange string) *module.Charts {
+	charts := chartsTmpl.Copy()
+
+	for _, c := range *charts {
+		c.ID = fmt.Sprintf(c.ID, dhcpRange)
+		c.Labels = []module.Label{
+			{Key: "dhcp_range", Value: dhcpRange},
+		}
+		for _, d := range c.Dims {
+			d.ID = fmt.Sprintf(d.ID, dhcpRange)
+		}
+	}
+	return charts
+}
+
+func (d *DnsmasqDHCP) addDHCPRangeCharts(dhcpRange string) {
+	charts := newDHCPRangeCharts(dhcpRange)
+	if err := d.Charts().Add(*charts...); err != nil {
+		d.Warning(err)
+	}
+}
+
+func (d *DnsmasqDHCP) removeDHCPRangeCharts(dhcpRange string) {
+	p := "dhcp_range_" + dhcpRange
+	for _, c := range *d.Charts() {
+		if strings.HasSuffix(c.ID, p) {
+			c.MarkRemove()
+			c.MarkNotCreated()
+		}
+	}
+}