From c32d8a5db030168b042ad52b2a6dd99bb34d4d87 Mon Sep 17 00:00:00 2001
From: Solderpunk <solderpunk@sdf.org>
Date: Tue, 5 Nov 2019 20:30:09 +0000
Subject: Factor out duplicated code between do_recent and do_search.

---
 telem.lua | 67 +++++++++++++++++++++++++--------------------------------------
 1 file changed, 27 insertions(+), 40 deletions(-)

diff --git a/telem.lua b/telem.lua
index a087954..3c6ac8e 100755
--- a/telem.lua
+++ b/telem.lua
@@ -471,24 +471,7 @@ function do_new()
 end
 
 function do_recent()
-	local recent = {}
-	local N = 10
-	for i, board in ipairs(boards) do
-		local threads = get_threads(board)
-		for _, thread in ipairs(threads) do
-			local x = {}
-			x.board = board
-			x.thread = thread
-			if #recent < N then
-				table.insert(recent, x)
-				table.sort(recent, function(x,y) return x.thread.updated > y.thread.updated end)
-			elseif thread.updated > recent[N].thread.updated then
-				table.remove(recent, N)
-				table.insert(recent, x)
-				table.sort(recent, function(x,y) return x.thread.updated > y.thread.updated end)
-			end
-		end
-	end
+	local recent = filter_latest_posts(function(x) return true end, 10)
 	print("Most recently active threads:")
 	print(colourise("magenta", string.format("%s %s %s",
 		stringx.ljust("Board name", 20),
@@ -504,6 +487,29 @@ function do_recent()
 	print(string.rep("-",79))
 end
 
+function filter_latest_posts(filter, N)
+	local matches = {}
+	for i, board in ipairs(boards) do
+		local threads = get_threads(board)
+		for _, thread in ipairs(threads) do
+			local x = {}
+			x.board = board
+			x.thread = thread
+			if filter(x) == nil then
+				-- pass
+			elseif #matches < N then
+				table.insert(matches, x)
+				table.sort(matches, function(x,y) return x.thread.updated > y.thread.updated end)
+			elseif thread.updated > matches[N].thread.updated then
+				table.remove(matches, N)
+				table.insert(matches, x)
+				table.sort(matches, function(x,y) return x.thread.updated > y.thread.updated end)
+			end
+		end
+	end
+	return matches
+end
+
 function do_scan()
 	for i, board in ipairs(boards) do
 		io.write(string.format("%3d ", i))
@@ -531,28 +537,9 @@ function do_search()
 		print("Search cancelled.")
 		return
 	end
-	local hits = {}
-	local N = 10
-	for i, board in ipairs(boards) do
-		local threads = get_threads(board)
-		for _, thread in ipairs(threads) do
-			local x = {}
-			x.board = board
-			x.thread = thread
-			if string.find(string.lower(x.thread.subject), string.lower(searchterm)) == nil then
-				goto continue
-			end
-			if #hits < N then
-				table.insert(hits, x)
-				table.sort(hits, function(x,y) return x.thread.updated > y.thread.updated end)
-			elseif thread.updated > hits[N].thread.updated then
-				table.remove(hits, N)
-				table.insert(hits, x)
-				table.sort(hits, function(x,y) return x.thread.updated > y.thread.updated end)
-			end
-			::continue::
-		end
-	end
+	local hits = filter_latest_posts(function(x)
+		return string.find(string.lower(x.thread.subject), string.lower(searchterm))
+	end, 10)
 	if #hits == 0 then
 		print("No hits found.")
 		return
-- 
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