From 42a060a85255ac7e4ee33f5c16d3434c12a8f8fb Mon Sep 17 00:00:00 2001
From: Florian Eckert <fe@dev.tdt.de>
Date: Thu, 7 Mar 2019 10:26:12 +0100
Subject: [PATCH] luci-app-statistics: Diskfree graph show also percent view

The Diskfree (df) plugin could also collect the values in percent if the
option "ValuesPercentage" is set in the collectd configuration.
This commit will check if "df_complex" / "percent_bytes" or both are
collected by collectd and so will show the corrsponding graph.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>
---
 .../statistics/rrdtool/definitions/df.lua     | 49 ++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/df.lua b/applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/df.lua
index b5633c15ff..7a69e85ee5 100644
--- a/applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/df.lua
+++ b/applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/df.lua
@@ -5,7 +5,7 @@ module("luci.statistics.rrdtool.definitions.df", package.seeall)
 
 function rrdargs( graph, plugin, plugin_instance, dtype )
 
-	return {
+	local df_complex = {
 		title = "%H: Disk space usage on %pi",
 		vlabel = "Bytes",
 		number_format = "%5.1lf%sB",
@@ -36,4 +36,51 @@ function rrdargs( graph, plugin, plugin_instance, dtype )
 			}
 		}
 	}
+
+	local percent_bytes = {
+		title = "%H: Disk space usage on %pi",
+		vlabel = "Percent",
+		number_format = "%5.2lf %%",
+
+		data = {
+			instances = {
+				percent_bytes = { "free", "used", "reserved" }
+			},
+
+			options = {
+				percent_bytes_free = {
+					color = "00ff00",
+					overlay = false,
+					title = "free"
+				},
+
+				percent_bytes_used = {
+					color = "ff0000",
+					overlay = false,
+					title = "used"
+				},
+
+				percent_bytes_reserved = {
+					color = "0000ff",
+					overlay = false,
+					title = "reserved"
+				}
+			}
+		}
+	}
+
+	local types = graph.tree:data_types( plugin, plugin_instance )
+
+	local p = {}
+	for _, t in ipairs(types) do
+		if t == "percent_bytes" then
+			p[#p+1] = percent_bytes
+		end
+
+		if t == "df_complex" then
+			p[#p+1] = df_complex
+		end
+	end
+
+	return p
 end
-- 
2.30.2