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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "github.com/pflow-dev/go-metamodel/v2/image" | ||
| "github.com/pflow-dev/go-metamodel/v2/metamodel" | ||
| "github.com/pflow-dev/go-metamodel/v2/model" | ||
| "html/template" | ||
| "net/http" | ||
| ) | ||
|
|
||
| type HandlerWithVars = func(vars map[string]string, w http.ResponseWriter, r *http.Request) | ||
|
|
||
| type VarsFactory = func(r *http.Request) map[string]string | ||
|
|
||
| func WithVars(handler HandlerWithVars, getVarsFunc VarsFactory) http.HandlerFunc { | ||
| return func(w http.ResponseWriter, r *http.Request) { | ||
| handler(getVarsFunc(r), w, r) | ||
| } | ||
| } | ||
|
|
||
| type BlobAccessor interface { | ||
| Get(id int64) *model.Zblob | ||
| GetByCid(cid string) *model.Zblob | ||
| GetMaxId() int64 | ||
| Create(ipfsCid, base64Zipped, title, description, keywords, referrer string) (int64, error) | ||
| } | ||
| type Storage struct { | ||
| Model BlobAccessor | ||
| Snippet BlobAccessor | ||
| } | ||
|
|
||
| type Service interface { | ||
| IndexPage() *template.Template | ||
| SandboxPage() *template.Template | ||
| Event(eventType string, params map[string]interface{}) | ||
| GetState(r *http.Request) (state metamodel.Vector, ok bool) | ||
| CheckForSnippet(hostname string, url string, referrer string) (string, bool) | ||
| CheckForModel(hostname string, url string, referrer string) (string, bool) | ||
| } | ||
| type App struct { | ||
| Service | ||
| Storage | ||
| } | ||
|
|
||
| func (app *App) AppPage(vars map[string]string, w http.ResponseWriter, r *http.Request) { | ||
| cid, found := app.CheckForModel(r.Host, r.URL.String(), r.Header.Get("Referer")) | ||
| if found { | ||
| http.Redirect(w, r, "/p/"+cid+"/", http.StatusFound) | ||
| return | ||
| } | ||
| m := model.Model{} | ||
| if vars["pflowCid"] != "" { | ||
| w.Header().Set("Content-Type", "text/html; charset=utf-8") | ||
| m = app.Storage.Model.GetByCid(vars["pflowCid"]).ToModel() | ||
| if m.ID != 0 && m.IpfsCid == vars["pflowCid"] { | ||
| m.MetaModel() | ||
| } | ||
| } | ||
| _ = app.IndexPage().ExecuteTemplate(w, "index.html", m) | ||
| } | ||
|
|
||
| func (app *App) SvgHandler(vars map[string]string, w http.ResponseWriter, r *http.Request) { | ||
| cid, found := app.CheckForModel(r.Host, r.URL.String(), r.Header.Get("Referer")) | ||
| if found { | ||
| http.Redirect(w, r, "/img/"+cid+".svg", http.StatusFound) | ||
| return | ||
| } | ||
| if vars["pflowCid"] == "" { | ||
| return | ||
| } | ||
| w.Header().Set("Content-Type", "image/svg+xml ; charset=utf-8") | ||
| m := app.Storage.Model.GetByCid(vars["pflowCid"]).ToModel() | ||
| _, mm := m.MetaModel() | ||
| if m.IpfsCid != vars["pflowCid"] { | ||
| return | ||
| } | ||
| app.Event("viewSvg", map[string]interface{}{ | ||
| "id": m.ID, | ||
| "ipfsCid": m.IpfsCid, | ||
| }) | ||
| x1, y1, width, height := mm.GetViewPort() | ||
| i := image.NewSvg(w, width, height, x1, y1, width, height) | ||
|
|
||
| state, stateOk := app.GetState(r) | ||
| if !stateOk || len(state) != len(mm.Net().Places) { | ||
| state = mm.Net().InitialVector() | ||
| } | ||
| i.Render(mm, state) | ||
| } | ||
|
|
||
| func (app *App) JsonHandler(vars map[string]string, w http.ResponseWriter, r *http.Request) { | ||
| mm := metamodel.New() | ||
| cid, found := app.CheckForModel(r.Host, r.URL.String(), r.Header.Get("Referer")) | ||
| if found { | ||
| http.Redirect(w, r, "/src/"+cid+".json", http.StatusFound) | ||
| } else if vars["pflowCid"] != "" { | ||
| m := app.Storage.Model.GetByCid(vars["pflowCid"]) | ||
| w.Header().Set("Content-Type", "application/javascript; charset=utf-8") | ||
| mm.UnpackFromUrl("?z="+m.Base64Zipped, "model.json") | ||
| app.Event("viewJson", map[string]interface{}{ | ||
| "id": m.ID, | ||
| "ipfsCid": m.IpfsCid, | ||
| }) | ||
| data, _ := json.MarshalIndent(mm.ToDeclarationObject(), "", " ") | ||
| _, err := w.Write(data) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (app *App) SandboxHandler(vars map[string]string, w http.ResponseWriter, r *http.Request) { | ||
| cid, found := app.CheckForSnippet(r.Host, r.URL.String(), r.Header.Get("Referer")) | ||
| if found { | ||
| http.Redirect(w, r, "/sandbox/"+cid+"/", http.StatusFound) | ||
| } else if vars["pflowCid"] != "" { | ||
| rec := app.Storage.Snippet.GetByCid(vars["pflowCid"]) | ||
| sourceCode, ok := metamodel.UnzipUrl("?z="+rec.Base64Zipped, "declaration.js") | ||
| if !ok { | ||
| http.Error(w, "Failed to unzip snippet", http.StatusInternalServerError) | ||
| return | ||
| } | ||
| w.Header().Set("Content-Type", "text/html; charset=utf-8") | ||
| templateData := struct { | ||
| IpfsCid string | ||
| SourceCode string | ||
| }{ | ||
| IpfsCid: vars["pflowCid"], | ||
| SourceCode: sourceCode, | ||
| } | ||
| _ = app.SandboxPage().ExecuteTemplate(w, "index.html", templateData) | ||
| } | ||
| } |