Extract Lua infrastructure into a plugin

1 files changed, 0 insertions, 180 deletions

diff --git a/plugin_lua.go b/plugin_lua.go
deleted file mode 100644
index 8291a20..0000000
--- a/plugin_lua.go
+++ /dev/null
@@ -1,180 +0,0 @@
-package koushin
-
-import (
-	"fmt"
-	"html/template"
-	"path/filepath"
-
-	"github.com/labstack/echo/v4"
-	"github.com/yuin/gopher-lua"
-	"layeh.com/gopher-luar"
-)
-
-type luaRoute struct {
-	method string
-	path   string
-	f      *lua.LFunction
-}
-
-type luaPlugin struct {
-	filename        string
-	state           *lua.LState
-	renderCallbacks map[string]*lua.LFunction
-	filters         template.FuncMap
-	routes          []luaRoute
-}
-
-func (p *luaPlugin) Name() string {
-	return p.filename
-}
-
-func (p *luaPlugin) onRender(l *lua.LState) int {
-	name := l.CheckString(1)
-	f := l.CheckFunction(2)
-	p.renderCallbacks[name] = f
-	return 0
-}
-
-func (p *luaPlugin) setFilter(l *lua.LState) int {
-	name := l.CheckString(1)
-	f := l.CheckFunction(2)
-	p.filters[name] = func(args ...interface{}) string {
-		luaArgs := make([]lua.LValue, len(args))
-		for i, v := range args {
-			luaArgs[i] = luar.New(l, v)
-		}
-
-		err := l.CallByParam(lua.P{
-			Fn:      f,
-			NRet:    1,
-			Protect: true,
-		}, luaArgs...)
-		if err != nil {
-			panic(err) // TODO: better error handling?
-		}
-
-		ret := l.CheckString(-1)
-		l.Pop(1)
-		return ret
-	}
-	return 0
-}
-
-func (p *luaPlugin) setRoute(l *lua.LState) int {
-	method := l.CheckString(1)
-	path := l.CheckString(2)
-	f := l.CheckFunction(3)
-	p.routes = append(p.routes, luaRoute{method, path, f})
-	return 0
-}
-
-func (p *luaPlugin) inject(name string, data RenderData) error {
-	f, ok := p.renderCallbacks[name]
-	if !ok {
-		return nil
-	}
-
-	err := p.state.CallByParam(lua.P{
-		Fn:      f,
-		NRet:    0,
-		Protect: true,
-	}, luar.New(p.state, data))
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func (p *luaPlugin) Inject(ctx *Context, name string, data RenderData) error {
-	if err := p.inject("*", data); err != nil {
-		return err
-	}
-	return p.inject(name, data)
-}
-
-func (p *luaPlugin) LoadTemplate(t *template.Template) error {
-	t.Funcs(p.filters)
-
-	paths, err := filepath.Glob(filepath.Dir(p.filename) + "/public/*.html")
-	if err != nil {
-		return err
-	}
-	if len(paths) > 0 {
-		if _, err := t.ParseFiles(paths...); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (p *luaPlugin) SetRoutes(group *echo.Group) {
-	for _, r := range p.routes {
-		group.Match([]string{r.method}, r.path, func(ctx echo.Context) error {
-			err := p.state.CallByParam(lua.P{
-				Fn:      r.f,
-				NRet:    0,
-				Protect: true,
-			}, luar.New(p.state, ctx))
-			if err != nil {
-				return fmt.Errorf("Lua plugin error: %v", err)
-			}
-
-			return nil
-		})
-	}
-
-	_, name := filepath.Split(filepath.Dir(p.filename))
-	group.Static("/plugins/"+name+"/assets", filepath.Dir(p.filename)+"/public/assets")
-}
-
-func (p *luaPlugin) Close() error {
-	p.state.Close()
-	return nil
-}
-
-func loadLuaPlugin(filename string) (*luaPlugin, error) {
-	l := lua.NewState()
-	p := &luaPlugin{
-		filename:        filename,
-		state:           l,
-		renderCallbacks: make(map[string]*lua.LFunction),
-		filters:         make(template.FuncMap),
-	}
-
-	mt := l.NewTypeMetatable("koushin")
-	l.SetGlobal("koushin", mt)
-	l.SetField(mt, "on_render", l.NewFunction(p.onRender))
-	l.SetField(mt, "set_filter", l.NewFunction(p.setFilter))
-	l.SetField(mt, "set_route", l.NewFunction(p.setRoute))
-
-	if err := l.DoFile(filename); err != nil {
-		l.Close()
-		return nil, err
-	}
-
-	return p, nil
-}
-
-func loadAllLuaPlugins(log echo.Logger) ([]Plugin, error) {
-	filenames, err := filepath.Glob(pluginDir + "/*/main.lua")
-	if err != nil {
-		return nil, fmt.Errorf("filepath.Glob failed: %v", err)
-	}
-
-	plugins := make([]Plugin, 0, len(filenames))
-	for _, filename := range filenames {
-		log.Printf("Loading Lua plugin '%v'", filename)
-		p, err := loadLuaPlugin(filename)
-		if err != nil {
-			for _, p := range plugins {
-				p.Close()
-			}
-			return nil, fmt.Errorf("failed to load Lua plugin '%v': %v", filename, err)
-		}
-		plugins = append(plugins, p)
-	}
-
-	return plugins, nil
-}