subrouters
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@@ -0,0 +1,285 @@
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package templates
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import (
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"errors"
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"fmt"
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"log/slog"
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"net/http"
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"net/url"
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"os"
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"path"
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"path/filepath"
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"strconv"
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"strings"
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"ruben/inventory2/internal/domains/accounts"
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etsy_platform "ruben/inventory2/internal/domains/platforms/etsy"
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"ruben/inventory2/internal/domains/raw_events"
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"ruben/inventory2/internal/server/middleware"
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"ruben/inventory2/internal/server/response"
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"ruben/inventory2/internal/server/router"
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"github.com/angelbeltran/templater"
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)
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type webpageRouter struct {
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log *slog.Logger
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contentDir string
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templater *templater.Templater
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rawEvents *raw_events.Store
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accts *accounts.Store
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etsy *etsy_platform.Platform
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router.Subrouter
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}
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func NewWebpageRouter(
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logger *slog.Logger,
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contentDir string,
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tmpl *templater.Templater,
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rawEvents *raw_events.Store,
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accts *accounts.Store,
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etsy *etsy_platform.Platform,
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authMiddleware *middleware.Auth,
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) *webpageRouter {
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mux := router.NewSubMux(logger)
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wr := &webpageRouter{
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log: logger,
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contentDir: contentDir,
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templater: tmpl,
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rawEvents: rawEvents,
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accts: accts,
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etsy: etsy,
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Subrouter: mux,
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}
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// non-authenticated
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mux.Handle("GET /{$}", authMiddleware.AddIdentity(wr.serveTemplates))
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// authenticated
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mux.Handle("GET /", authMiddleware.AuthenticateAndAddIdentity(wr.serveTemplates))
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return wr
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}
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// GET /
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// compiles the page template or component template matching the url
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// func (s *Server) serveTemplates(r *http.Request) (response.Response, error) {
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func (s *webpageRouter) serveTemplates(r *http.Request) (response.Response, error) {
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fmt.Println("webpageRouter.serveTemplates:", r.URL)
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name, args := s.getTemplateNameAndArgs(r, s.contentDir+"/templates/component_bodies")
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b, err := s.templater.ExecuteComponentBody(name, args...)
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if err == nil {
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return response.HTML(b), nil
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}
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if !isFileNotFoundError(err) {
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return s.handleTemplateError(err, args...)
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}
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name, args = s.getTemplateNameAndArgs(r, s.contentDir+"/templates/page_bodies")
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if b, err = s.templater.ExecutePage(name, args...); err == nil {
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return response.HTML(b), nil
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}
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return s.handleTemplateError(err, args...)
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}
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// func (s *Server) getTemplateNameAndArgs(r *http.Request, templateDir string) (name string, args []any) {
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func (s *webpageRouter) getTemplateNameAndArgs(r *http.Request, templateDir string) (name string, args []any) {
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fmt.Println("webpageRouter.getTemplateNameAndArgs:", r.URL)
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ctx := r.Context()
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name, pathParams := getTemplateNameForURL(r.URL, templateDir)
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return name, []any{
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"Request",
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r,
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// add services and data here
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"RawEvents",
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s.rawEvents.WithContext(ctx),
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"URLCalc",
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newURLCalculator(r.URL),
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"PathParams",
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pathParams,
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"Accounts",
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s.accts.WithContext(ctx),
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"Etsy",
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s.etsy.WithContext(ctx),
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// TODO: apply auth to all templates needed!
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// auth tooling
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/*
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AccessToken string
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Claims authentication.AccessTokenClaims
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User accounts.OAuthUser
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Account *accounts.Account
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*/
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"Identity",
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middleware.GetIdentity(r.Context()),
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"Auth",
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newTemplateAuthenticator(r),
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}
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}
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// TODO: clean this up...
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// TODO: somehow tell what the path params are and pass them up.
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// - then consider pushing this functionality into the template library.
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//
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// getComponentTemplateNameForURL eliminate any trailing .html or /, and checks for any
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// file with path parameters in the name, eg '{abc}.html.tmpl', prefering exact filename matches.
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func getTemplateNameForURL(u *url.URL, templateDir string) (name string, params map[string]string) {
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templateDir = path.Clean(templateDir)
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fp := strings.TrimPrefix(strings.TrimSuffix(strings.TrimSuffix(u.Path, ".html"), "/"), "/")
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if fp == "" {
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// "/" maps to "/index"
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fp = "index"
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}
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fpParts := strings.Split(fp, "/")
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res := getMatchingGlobPatternsCapturingFilepathIncludingParametrizedFilepaths(fpParts)
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for _, combs := range res {
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pattern := path.Join(templateDir, path.Join(combs...)) + ".html.tmpl"
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matches, _ := filepath.Glob(pattern)
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if len(matches) == 0 {
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pattern := path.Join(templateDir, path.Join(combs...), "index") + ".html.tmpl"
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matches, _ = filepath.Glob(pattern)
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}
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if len(matches) > 0 {
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match := matches[0]
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name = strings.TrimPrefix(strings.TrimSuffix(match, ".html.tmpl"), templateDir+"/")
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patternParts := strings.Split(name, "/")
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params = make(map[string]string)
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for i, pp := range patternParts {
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if strings.HasPrefix(pp, "{") && strings.HasSuffix(pp, "}") {
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params[pp[1:len(pp)-1]] = fpParts[i]
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}
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}
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return name, params
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}
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}
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return fp, nil
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}
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func getMatchingGlobPatternsCapturingFilepathIncludingParametrizedFilepaths(filepathParts []string) [][]string {
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switch len(filepathParts) {
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case 0:
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return nil
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case 1:
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return [][]string{
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[]string{filepathParts[0]},
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[]string{"{*}"},
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}
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default:
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tailCombs := getMatchingGlobPatternsCapturingFilepathIncludingParametrizedFilepaths(filepathParts[1:])
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combs := make([][]string, 2*len(tailCombs))
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for i, c := range tailCombs {
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combs[i*2] = append([]string{filepathParts[0]}, c...)
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combs[i*2+1] = append([]string{"{*}"}, c...)
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}
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return combs
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}
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}
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// func (s *Server) handleTemplateError(err error, templateArgs ...any) (response.Response, error) {
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func (s *webpageRouter) handleTemplateError(err error, templateArgs ...any) (response.Response, error) {
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if isFileNotFoundError(err) {
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return nil, response.NotFound().
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Wrap(err).
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Msg("resource not found")
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}
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return nil, err
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}
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func isFileNotFoundError(err error) bool {
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var pe *os.PathError
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isPathErr := errors.As(err, &pe)
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return isPathErr && pe.Err != nil && pe.Err.Error() == "no such file or directory"
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}
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func getHTTPStatusCode(err error) int {
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rerr, ok := response.GetError(err)
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if !ok {
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return http.StatusInternalServerError
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}
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code, ok := rerr.GetStatus()
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if !ok {
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return http.StatusInternalServerError
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}
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return code
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}
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// template tooling
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type URLCalculator struct {
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url *url.URL
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}
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func newURLCalculator(u *url.URL) URLCalculator {
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cpy := *u
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return URLCalculator{
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url: &cpy,
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}
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}
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func (c URLCalculator) SetQueryParam(k string, v any) string {
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u := *c.url
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q := u.Query()
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q.Set(k, fmt.Sprint(v))
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u.RawQuery = q.Encode()
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return u.String()
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}
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// template authenticator
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type templateAuthenticator struct {
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req *http.Request
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}
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func newTemplateAuthenticator(req *http.Request) *templateAuthenticator {
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return &templateAuthenticator{
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req: req,
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}
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}
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// templateAuthorizationFunc these shouild always return an empty string
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type templateAuthorizationFunc = func() (string, error)
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func (a *templateAuthenticator) ByMatchingAccountID(acctIDPathPosition int) (string, error) {
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return "", authorizeByMatchingAccountID(a.req, acctIDPathPosition)
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}
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func authorizeByMatchingAccountID(r *http.Request, acctIDPathPosition int) error {
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pathParts := strings.Split(strings.TrimSuffix(strings.TrimPrefix(r.URL.Path, "/"), "/"), "/")
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if len(pathParts) < acctIDPathPosition {
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return fmt.Errorf("authorization failed due to unexpected path: %s", r.URL.Path)
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}
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part := pathParts[acctIDPathPosition-1]
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acctID, err := strconv.ParseInt(part, 10, 64)
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if err != nil {
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return response.NotFound().
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Msgf("account does not exist: %s", part)
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}
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id := middleware.GetIdentity(r.Context())
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if id.Account == nil || id.Account.AccountID != acctID {
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return response.Unauthorized().
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Msgf("user does not have access to account %d", acctID)
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}
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return nil
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}
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