feat: uuid.lua 生成符合RFC 4122标准的UUID v4 (#1383)

lua/uuid.lua

@@ -0,0 +1,46 @@
+local function yield_cand(seg, text)
+	local cand = Candidate("", seg.start, seg._end, text, "")
+	cand.quality = 100
+	yield(cand)
+end
+
+local fmt = string.format
+local rand = math.random
+local randomseed = math.randomseed
+
+local function generate_uuid_v4()
+	return fmt(
+		"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+		rand(0, 255),
+		rand(0, 255),
+		rand(0, 255),
+		rand(0, 255),
+		rand(0, 255),
+		rand(0, 255),
+		(rand(0, 255) & 0x0F) | 0x40,
+		rand(0, 255),
+		(rand(0, 255) & 0x3F) | 0x80,
+		rand(0, 255),
+		rand(0, 255),
+		rand(0, 255),
+		rand(0, 255),
+		rand(0, 255),
+		rand(0, 255),
+		rand(0, 255)
+	)
+end
+
+local M = {}
+
+function M.init(env)
+	M.uuid = env.engine.schema.config:get_string(env.name_space:gsub("^*", "")) or "uuid"
+end
+
+function M.func(input, seg, _)
+	if input == M.uuid then
+		randomseed(os.time())
+		yield_cand(seg, generate_uuid_v4())
+	end
+end
+
+return M