454 lines
11 KiB
Go
454 lines
11 KiB
Go
package api
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import (
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"context"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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"github.com/gorilla/mux"
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"github.com/mattermost/mattermost-octo-tasks/server/app"
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"github.com/mattermost/mattermost-octo-tasks/server/model"
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)
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// ----------------------------------------------------------------------------------------------------
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// REST APIs
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type API struct {
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appBuilder func() *app.App
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singleUser bool
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}
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func NewAPI(appBuilder func() *app.App, singleUser bool) *API {
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return &API{appBuilder: appBuilder, singleUser: singleUser}
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}
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func (a *API) app() *app.App {
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return a.appBuilder()
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}
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func (a *API) RegisterRoutes(r *mux.Router) {
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r.HandleFunc("/api/v1/blocks", a.sessionRequired(a.handleGetBlocks)).Methods("GET")
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r.HandleFunc("/api/v1/blocks", a.sessionRequired(a.handlePostBlocks)).Methods("POST")
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r.HandleFunc("/api/v1/blocks/{blockID}", a.sessionRequired(a.handleDeleteBlock)).Methods("DELETE")
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r.HandleFunc("/api/v1/blocks/{blockID}/subtree", a.sessionRequired(a.handleGetSubTree)).Methods("GET")
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r.HandleFunc("/api/v1/users/me", a.sessionRequired(a.handleGetMe)).Methods("GET")
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r.HandleFunc("/api/v1/users/{userID}", a.sessionRequired(a.handleGetUser)).Methods("GET")
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r.HandleFunc("/api/v1/login", a.handleLogin).Methods("POST")
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r.HandleFunc("/api/v1/register", a.handleRegister).Methods("POST")
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r.HandleFunc("/api/v1/files", a.sessionRequired(a.handleUploadFile)).Methods("POST")
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r.HandleFunc("/files/{filename}", a.sessionRequired(a.handleServeFile)).Methods("GET")
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r.HandleFunc("/api/v1/blocks/export", a.sessionRequired(a.handleExport)).Methods("GET")
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r.HandleFunc("/api/v1/blocks/import", a.sessionRequired(a.handleImport)).Methods("POST")
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}
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func (a *API) handleGetBlocks(w http.ResponseWriter, r *http.Request) {
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query := r.URL.Query()
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parentID := query.Get("parent_id")
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blockType := query.Get("type")
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blocks, err := a.app().GetBlocks(parentID, blockType)
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if err != nil {
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log.Printf(`ERROR GetBlocks: %v, REQUEST: %v`, err, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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log.Printf("GetBlocks parentID: %s, type: %s, %d result(s)", parentID, blockType, len(blocks))
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json, err := json.Marshal(blocks)
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if err != nil {
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log.Printf(`ERROR json.Marshal: %v, REQUEST: %v`, err, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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jsonBytesResponse(w, http.StatusOK, json)
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}
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func stampModifiedByUser(r *http.Request, blocks []model.Block) {
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ctx := r.Context()
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session := ctx.Value("session").(*model.Session)
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userID := session.UserID
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if userID == "single-user" {
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userID = ""
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}
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for i := range blocks {
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blocks[i].ModifiedBy = userID
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}
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}
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func (a *API) handlePostBlocks(w http.ResponseWriter, r *http.Request) {
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requestBody, err := ioutil.ReadAll(r.Body)
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if err != nil {
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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// Catch panics from parse errors, etc.
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defer func() {
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if r := recover(); r != nil {
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log.Printf(`ERROR: %v`, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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}()
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var blocks []model.Block
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err = json.Unmarshal(requestBody, &blocks)
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if err != nil {
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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for _, block := range blocks {
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// Error checking
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if len(block.Type) < 1 {
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errorData := map[string]string{"description": "missing type", "id": block.ID}
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errorResponse(w, http.StatusBadRequest, errorData)
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return
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}
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if block.CreateAt < 1 {
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errorData := map[string]string{"description": "invalid createAt", "id": block.ID}
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errorResponse(w, http.StatusBadRequest, errorData)
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return
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}
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if block.UpdateAt < 1 {
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errorData := map[string]string{"description": "invalid UpdateAt", "id": block.ID}
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errorResponse(w, http.StatusBadRequest, errorData)
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return
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}
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}
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stampModifiedByUser(r, blocks)
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err = a.app().InsertBlocks(blocks)
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if err != nil {
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log.Printf(`ERROR: %v, REQUEST: %v`, err, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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log.Printf("POST Blocks %d block(s)", len(blocks))
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jsonStringResponse(w, http.StatusOK, "{}")
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}
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func (a *API) handleGetUser(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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userID := vars["userID"]
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user, err := a.app().GetUser(userID)
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if err != nil {
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log.Printf(`ERROR: %v`, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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userData, err := json.Marshal(user)
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if err != nil {
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log.Printf(`ERROR: %v`, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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jsonStringResponse(w, http.StatusOK, string(userData))
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}
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func (a *API) handleGetMe(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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session := ctx.Value("session").(*model.Session)
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var user *model.User
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var err error
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if session.UserID == "single-user" {
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now := time.Now().Unix()
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user = &model.User{
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ID: "single-user",
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Username: "single-user",
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Email: "single-user",
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CreateAt: now,
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UpdateAt: now,
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}
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} else {
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user, err = a.app().GetUser(session.UserID)
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if err != nil {
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log.Printf(`ERROR: %v`, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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}
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userData, err := json.Marshal(user)
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if err != nil {
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log.Printf(`ERROR: %v`, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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jsonStringResponse(w, http.StatusOK, string(userData))
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}
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func (a *API) handleDeleteBlock(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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blockID := vars["blockID"]
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err := a.app().DeleteBlock(blockID)
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if err != nil {
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log.Printf(`ERROR: %v, REQUEST: %v`, err, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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log.Printf("DELETE Block %s", blockID)
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jsonStringResponse(w, http.StatusOK, "{}")
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}
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func (a *API) handleGetSubTree(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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blockID := vars["blockID"]
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query := r.URL.Query()
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levels, err := strconv.ParseInt(query.Get("l"), 10, 32)
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if err != nil {
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levels = 2
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}
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if levels != 2 && levels != 3 {
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log.Printf(`ERROR Invalid levels: %d`, levels)
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errorData := map[string]string{"description": "invalid levels"}
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errorResponse(w, http.StatusInternalServerError, errorData)
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return
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}
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blocks, err := a.app().GetSubTree(blockID, int(levels))
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if err != nil {
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log.Printf(`ERROR: %v, REQUEST: %v`, err, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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log.Printf("GetSubTree (%v) blockID: %s, %d result(s)", levels, blockID, len(blocks))
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json, err := json.Marshal(blocks)
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if err != nil {
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log.Printf(`ERROR json.Marshal: %v, REQUEST: %v`, err, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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jsonBytesResponse(w, http.StatusOK, json)
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}
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func (a *API) handleExport(w http.ResponseWriter, r *http.Request) {
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blocks, err := a.app().GetAllBlocks()
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if err != nil {
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log.Printf(`ERROR: %v, REQUEST: %v`, err, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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log.Printf("%d raw block(s)", len(blocks))
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blocks = filterOrphanBlocks(blocks)
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log.Printf("EXPORT %d filtered block(s)", len(blocks))
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json, err := json.Marshal(blocks)
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if err != nil {
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log.Printf(`ERROR json.Marshal: %v, REQUEST: %v`, err, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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jsonBytesResponse(w, http.StatusOK, json)
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}
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func filterOrphanBlocks(blocks []model.Block) (ret []model.Block) {
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queue := make([]model.Block, 0)
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var childrenOfBlockWithID = make(map[string]*[]model.Block)
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// Build the trees from nodes
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for _, block := range blocks {
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if len(block.ParentID) == 0 {
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// Queue root blocks to process first
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queue = append(queue, block)
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} else {
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siblings := childrenOfBlockWithID[block.ParentID]
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if siblings != nil {
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*siblings = append(*siblings, block)
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} else {
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siblings := []model.Block{block}
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childrenOfBlockWithID[block.ParentID] = &siblings
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}
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}
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}
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// Map the trees to an array, which skips orphaned nodes
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blocks = make([]model.Block, 0)
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for len(queue) > 0 {
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block := queue[0]
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queue = queue[1:] // dequeue
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blocks = append(blocks, block)
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children := childrenOfBlockWithID[block.ID]
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if children != nil {
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queue = append(queue, (*children)...)
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}
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}
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return blocks
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}
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func arrayContainsBlockWithID(array []model.Block, blockID string) bool {
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for _, item := range array {
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if item.ID == blockID {
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return true
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}
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}
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return false
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}
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func (a *API) handleImport(w http.ResponseWriter, r *http.Request) {
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requestBody, err := ioutil.ReadAll(r.Body)
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if err != nil {
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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// Catch panics from parse errors, etc.
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defer func() {
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if r := recover(); r != nil {
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log.Printf(`ERROR: %v`, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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}()
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var blocks []model.Block
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err = json.Unmarshal(requestBody, &blocks)
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if err != nil {
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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stampModifiedByUser(r, blocks)
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err = a.app().InsertBlocks(blocks)
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if err != nil {
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log.Printf(`ERROR: %v, REQUEST: %v`, err, r)
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errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
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log.Printf("IMPORT Blocks %d block(s)", len(blocks))
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jsonStringResponse(w, http.StatusOK, "{}")
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}
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// File upload
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func (a *API) handleServeFile(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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filename := vars["filename"]
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contentType := "image/jpg"
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fileExtension := strings.ToLower(filepath.Ext(filename))
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if fileExtension == "png" {
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contentType = "image/png"
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}
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w.Header().Set("Content-Type", contentType)
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filePath := a.app().GetFilePath(filename)
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http.ServeFile(w, r, filePath)
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}
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func (a *API) handleUploadFile(w http.ResponseWriter, r *http.Request) {
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fmt.Println(`handleUploadFile`)
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file, handle, err := r.FormFile("file")
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if err != nil {
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fmt.Fprintf(w, "%v", err)
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return
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}
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defer file.Close()
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log.Printf(`handleUploadFile, filename: %s`, handle.Filename)
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url, err := a.app().SaveFile(file, handle.Filename)
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if err != nil {
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jsonStringResponse(w, http.StatusInternalServerError, `{}`)
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return
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}
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log.Printf(`saveFile, url: %s`, url)
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json := fmt.Sprintf(`{ "url": "%s" }`, url)
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jsonStringResponse(w, http.StatusOK, json)
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}
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// Response helpers
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func jsonStringResponse(w http.ResponseWriter, code int, message string) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(code)
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fmt.Fprint(w, message)
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}
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func jsonBytesResponse(w http.ResponseWriter, code int, json []byte) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(code)
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w.Write(json)
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}
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func errorResponse(w http.ResponseWriter, code int, message map[string]string) {
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log.Printf("%d ERROR", code)
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w.Header().Set("Content-Type", "application/json")
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data, err := json.Marshal(message)
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if err != nil {
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data = []byte("{}")
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}
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w.WriteHeader(code)
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w.Write(data)
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}
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func addUserID(rw http.ResponseWriter, req *http.Request, next http.Handler) {
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ctx := context.WithValue(req.Context(), "userid", req.Header.Get("userid"))
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req = req.WithContext(ctx)
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next.ServeHTTP(rw, req)
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}
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