nvim: implement the rest of date/time snippets

src/.config/nvim/snippets/all.lua

@@ -1,5 +1,28 @@
 return {
-	s({ trig = "today", desc = "YYYY-MM-DD date of today" }, f(function ()
+	--------------------------------	
+	--------------------------------	
+	-- date and timekeeping snippets
+	--------------------------------	
+	--------------------------------	
+	s({ trig = "today", desc = "YYYY-MM-DD date of today" }, f(function()
 		return os.date("%Y-%m-%d")
-	end))
+	end)),
+	s({ trig = "yesterday", desc = "YYYY-MM-DD date of yesterday" }, f(function()
+		local t = os.date("*t")
+		return os.date("%Y-%m-%d", os.time { year = t.year, month = t.month, day = t.day - 1 })
+	end)),
+
+	s({ trig = "timestamp", desc = "Unix day timestamp (locked to midnight)" }, f(function()
+		local t = os.date("*t")
+		return tostring(os.time { year = t.year, month = t.month, day = t.day, hour = 0 })
+	end)),
+	s(
+		{
+			trig = "datestamp (%d-)-(%d-)-(%d-)",
+			regTrig = true,
+			desc =
+			"YYYY-MM-DD to Unix day timestamp (locked to midnight)"
+		}, f(function(_, snip)
+			return tostring(os.time { year = snip.captures[1], month = snip.captures[2], day = snip.captures[3], hour = 0 })
+		end)),
 }