From 715416d4e6b8cf796b47a83020355b5bfe7bf022 Mon Sep 17 00:00:00 2001
From: Wuzzy <almikes@aol.com>
Date: Fri, 5 Aug 2016 00:02:34 +0200
Subject: Add mining groups back

---
 API.md   |  7 +++++++
 init.lua | 14 +++++++++++---
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/API.md b/API.md
index 72babaf..e6d70fe 100644
--- a/API.md
+++ b/API.md
@@ -262,6 +262,13 @@ The intention of this function is to give a short rundown of the groups
 which are notable as they are important to gameplay in some way yet don't
 deserve a full-blown factoid.
 
+### `doc.sub.items.add_notable_groups(groupnames)`
+Declare a number of groups as mining groups, that is, groups which are
+primarily used for determining mining times. They will appear in the
+“Mining capabilities” factoid.
+
+`groupnames` is a table of group names.
+
 ### `doc.sub.items.add_forced_item_entries(itemstrings)`
 Adds items which will be forced to be added to the entry list, even if
 the item is not in creative inventory.
diff --git a/init.lua b/init.lua
index f235601..ee91698 100644
--- a/init.lua
+++ b/init.lua
@@ -1,6 +1,7 @@
 doc.sub.items = {}
 
 local groupdefs = {}
+local mininggroups = {}
 local miscgroups = {}
 local forced_items = {
 	["air"] = true,
@@ -334,10 +335,10 @@ doc.new_category("nodes", {
 			local mstring = "This block can be mined by mining tools which match any of the following mining ratings and its mining level.\n"
 			mstring = mstring .. "Mining ratings:\n"
 			local minegroupcount = 0
-			for g,name in pairs(groupdefs) do
-				local rating = data.def.groups[g]
+			for group,_ in pairs(mininggroups) do
+				local rating = data.def.groups[group]
 				if rating ~= nil then
-					mstring = mstring .. "- "..name..": "..rating.."\n"
+					mstring = mstring .. "- "..groupdefs[group]..": "..rating.."\n"
 					minegroupcount = minegroupcount + 1
 				end
 			end
@@ -613,6 +614,13 @@ function doc.sub.items.add_real_group_names(groupnames)
 	end
 end
 
+-- Declare groups as mining groups
+function doc.sub.items.add_mining_groups(groupnames)
+	for g=1,#groupnames do
+		mininggroups[groupnames[g]] = true
+	end
+end
+
 -- Adds groups to be displayed in the generic “misc.” groups
 -- factoid. Those groups should be neither be used as mining
 -- groups nor as damage groups and should be relevant to the
-- 
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