luci-app-statistics: add new memory plugin option

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

applications/luci-app-statistics/luasrc/model/cbi/luci_statistics/memory.lua

@@ -10,4 +10,18 @@ s = m:section( NamedSection, "collectd_memory", "luci_statistics" )
 enable = s:option( Flag, "enable", translate("Enable this plugin") )
 enable.default = 0
 
+-- collectd_memory.valuesabsolute (ValuesAbsolute)
+valuespercentage = s:option( Flag, "ValuesAbsolute",
+	translate("Absolute values"),
+	translate("When set to true, we request absolute values"))
+valuespercentage.default = 1
+valuespercentage:depends( "enable", 1 )
+
+-- collectd_memory.valuespercentage (ValuesPercentage)
+valuespercentage = s:option( Flag, "ValuesPercentage",
+	translate("Percent values"),
+	translate("When set to true, we request percentage values"))
+valuespercentage.default = 0
+valuespercentage:depends( "enable", 1 )
+
 return m

applications/luci-app-statistics/luasrc/statistics/plugins/memory.lua

@@ -1,7 +1,7 @@
 return {
-	legend = { 
-		{ },
+	legend = {
 		{ },
+		{ "ValuesPercentage", "ValuesAbsolute" },
 		{ }
 	},
 	label = _("Memory"),

applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/memory.lua

@@ -16,24 +16,92 @@ function item()
 end
 
 function rrdargs( graph, plugin, plugin_instance, dtype )
+	local p = {}
 
-	return {
+	local memory = {
 		title = "%H: Memory usage",
 		vlabel = "MB",
 		number_format = "%5.1lf%s",
 		y_min = "0",
 		alt_autoscale_max = true,
 		data = {
-			instances = { 
-				memory = { "free", "buffered", "cached", "used" }
+			instances = {
+				memory = {
+					"free",
+					"buffered",
+					"cached",
+					"used"
+				}
 			},
 
 			options = {
-				memory_buffered	= { color = "0000ff", title = "Buffered" },
-				memory_cached	= { color = "ff00ff", title = "Cached" },
-				memory_used	= { color = "ff0000", title = "Used" },
-				memory_free	= { color = "00ff00", title = "Free" }
+				memory_buffered = {
+					color = "0000ff",
+					title = "Buffered"
+				},
+				memory_cached = {
+					color = "ff00ff",
+					title = "Cached"
+				},
+				memory_used = {
+					color = "ff0000",
+					title = "Used"
+				},
+				memory_free = {
+					color = "00ff00",
+					title = "Free"
+				}
 			}
 		}
 	}
+
+	local percent = {
+		title = "%H: Memory usage",
+		vlabel = "Percent",
+		number_format = "%5.1lf%%",
+		y_min = "0",
+		alt_autoscale_max = true,
+		data = {
+			instances = {
+				percent = {
+					"free",
+					"buffered",
+					"cached",
+					"used"
+				}
+			},
+			options = {
+				percent_buffered = {
+					color = "0000ff",
+					title = "Buffered"
+				},
+				percent_cached = {
+					color = "ff00ff",
+					title = "Cached"
+				},
+				percent_used = {
+					color = "ff0000",
+					title = "Used"
+				},
+				percent_free = {
+					color = "00ff00",
+					title = "Free"
+				}
+			}
+		}
+	}
+
+	local types = graph.tree:data_types( plugin, plugin_instance )
+
+	for _, t in ipairs(types) do
+		if t == "percent" then
+			p[#p+1] = percent
+		end
+
+		if t == "memory" then
+			p[#p+1] = memory
+		end
+	end
+
+	return p
 end