Example #1
0
func setCustomGlobals(L *luamod.LState) {
	// Return the server unix timestamp
	L.SetGlobal("unix", L.NewFunction(func(L *luamod.LState) int {
		L.Push(luamod.LNumber(time.Now().Unix()))
		return 1
	}))

	// Generate a random hexadecimal ID with the current timestamp as first 4 bytes,
	// this means keys will be sorted by creation date automatically if sorted lexicographically
	L.SetGlobal("hexid", L.NewFunction(func(L *luamod.LState) int {
		id, err := hexid.New(int(time.Now().UTC().Unix()))
		if err != nil {
			panic(err)
		}
		L.Push(luamod.LString(id.String()))
		return 1
	}))

	// Compute the Blake2B hash for the given string
	L.SetGlobal("blake2b", L.NewFunction(func(L *luamod.LState) int {
		hash := fmt.Sprintf("%x", blake2b.Sum256([]byte(L.ToString(1))))
		L.Push(luamod.LString(hash))
		return 1
	}))

	// Sleep for the given number of seconds
	L.SetGlobal("sleep", L.NewFunction(func(L *luamod.LState) int {
		time.Sleep(time.Duration(float64(L.ToNumber(1)) * float64(1e9)))
		return 0
	}))

	// Convert the given Markdown to HTML
	L.SetGlobal("markdownify", L.NewFunction(func(L *luamod.LState) int {
		output := blackfriday.MarkdownCommon([]byte(L.ToString(1)))
		L.Push(luamod.LString(string(output)))
		return 1
	}))

	// Render execute a Go HTML template, data must be a table with string keys
	L.SetGlobal("render", L.NewFunction(func(L *luamod.LState) int {
		tplString := L.ToString(1)
		data := luautil.TableToMap(L.ToTable(2))
		tpl, err := template.New("tpl").Parse(tplString)
		if err != nil {
			L.Push(luamod.LString(err.Error()))
			return 1
		}
		// TODO(tsileo) add some templatFuncs/template filter
		out := &bytes.Buffer{}
		if err := tpl.Execute(out, data); err != nil {
			L.Push(luamod.LString(err.Error()))
			return 1
		}
		L.Push(luamod.LString(out.String()))
		return 1
	}))

	// TODO(tsileo) a urljoin?

	// Return an absoulte URL for the given path
	L.SetGlobal("url", L.NewFunction(func(L *luamod.LState) int {
		// FIXME(tsileo) take the host from the req?
		L.Push(luamod.LString("http://localhost:8050" + L.ToString(1)))
		return 1
	}))
}
Example #2
0
func (tpl *TemplateModule) setctx(L *lua.LState) int {
	tpl.ctx.Ctx = luautil.TableToMap(L.ToTable(1))
	return 0
}