From d299f91246448a2de0a36c4b4fe66ec50e679df1 Mon Sep 17 00:00:00 2001
From: Solderpunk <solderpunk@sdf.org>
Date: Tue, 5 Nov 2019 19:51:44 +0000
Subject: Initial implementation of search function.

---
 telem.lua | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/telem.lua b/telem.lua
index 8925bed..a087954 100755
--- a/telem.lua
+++ b/telem.lua
@@ -523,6 +523,55 @@ function do_scan()
 	end
 end
 
+function do_search()
+	-- Get search term
+	io.write("Search term? ")
+	local searchterm = io.read()
+	if string.len(searchterm) == 0 then
+		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
+	if #hits == 0 then
+		print("No hits found.")
+		return
+	end
+	print("Most recently active matching threads:")
+	print(colourise("magenta", string.format("%s %s %s",
+		stringx.ljust("Board name", 20),
+		stringx.ljust("Thread topic" ,48),
+		"Latest post"))
+	)
+	print(string.rep("-",79))
+	for i, update in ipairs(hits) do
+		io.write(colourise("cyan", stringx.ljust(update.board.name,20)) .. " " ..
+			stringx.ljust(update.thread.subject, 48) .. " " ..
+			os.date("%B %d, %Y", update.thread.updated) .. "\n")
+	end
+	print(string.rep("-",79))
+end
+
 -- The "type" command is implemented using multiple functions
 -- do_type is the entry point, which runs a command dispatch loop that
 -- runs various do_type_xxx functions.
@@ -723,6 +772,7 @@ dispatch["r"] = do_reply
 dispatch["R"] = do_recent
 dispatch["b"] = do_board
 dispatch["c"] = do_colour
+dispatch["/"] = do_search
 
 -- Infinite loop of command dispatch
 function prompt()
-- 
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