[GH-207] Added CRUD operations in autolink plugin

server/api/api.go

@@ -8,6 +8,7 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/mattermost/mattermost-plugin-autolink/server/autolink"
+	"github.com/mattermost/mattermost-plugin-autolink/server/autolinkclient"
 )
 
 type Store interface {
@@ -34,7 +35,10 @@ func NewHandler(store Store, authorization Authorization) *Handler {
 	root := mux.NewRouter()
 	api := root.PathPrefix("/api/v1").Subrouter()
 	api.Use(h.adminOrPluginRequired)
-	api.HandleFunc("/link", h.setLink).Methods("POST")
+	link := api.PathPrefix("/link").Subrouter()
+	link.HandleFunc("", h.setLink).Methods(http.MethodPost)
+	link.HandleFunc("", h.deleteLink).Methods(http.MethodDelete)
+	link.HandleFunc("", h.getLinks).Methods(http.MethodGet)
 
 	api.Handle("{anything:.*}", http.NotFoundHandler())
 
@@ -98,7 +102,7 @@ func (h *Handler) setLink(w http.ResponseWriter, r *http.Request) {
 	found := false
 	changed := false
 	for i := range links {
-		if links[i].Name == newLink.Name || links[i].Pattern == newLink.Pattern {
+		if links[i].Name == newLink.Name {
 			if !links[i].Equals(newLink) {
 				links[i] = newLink
 				changed = true
@@ -114,12 +118,85 @@ func (h *Handler) setLink(w http.ResponseWriter, r *http.Request) {
 	status := http.StatusNotModified
 	if changed {
 		if err := h.store.SaveLinks(links); err != nil {
-			h.handleError(w, errors.Wrap(err, "unable to save link"))
+			h.handleError(w, errors.Wrap(err, "unable to save the link"))
 			return
 		}
 		status = http.StatusOK
 	}
 
+	ReturnStatusOK(status, w)
+}
+
+func (h *Handler) deleteLink(w http.ResponseWriter, r *http.Request) {
+	autolinkName := r.URL.Query().Get(autolinkclient.AutolinkNameQueryParam)
+	if autolinkName == "" {
+		h.handleError(w, errors.New("autolink name or pattern should not be empty"))
+		return
+	}
+
+	links := h.store.GetLinks()
+	found := false
+	for i := 0; i < len(links); i++ {
+		if links[i].Name == autolinkName {
+			links = append(links[:i], links[i+1:]...)
+			found = true
+		}
+	}
+
+	status := http.StatusNotModified
+	if found {
+		if err := h.store.SaveLinks(links); err != nil {
+			h.handleError(w, errors.Wrap(err, "unable to save the link"))
+			return
+		}
+		status = http.StatusOK
+	}
+
+	ReturnStatusOK(status, w)
+}
+
+func (h *Handler) getLinks(w http.ResponseWriter, r *http.Request) {
+	links := h.store.GetLinks()
+
+	autolinkName := r.URL.Query().Get(autolinkclient.AutolinkNameQueryParam)
+	if autolinkName == "" {
+		h.handleSendingJSONContent(w, links)
+		return
+	}
+
+	found := false
+	var autolinks []autolink.Autolink
+	for _, link := range links {
+		if link.Name == autolinkName {
+			autolinks = append(autolinks, link)
+			found = true
+		}
+	}
+
+	if !found {
+		h.handleError(w, errors.Errorf("no autolink found with name %s", autolinkName))
+		return
+	}
+
+	h.handleSendingJSONContent(w, autolinks)
+	return
+}
+
+func (h *Handler) handleSendingJSONContent(w http.ResponseWriter, v interface{}) {
+	w.Header().Set("Content-Type", "application/json")
+	b, err := json.Marshal(v)
+	if err != nil {
+		h.handleError(w, errors.Wrap(err, "failed to marshal JSON response"))
+		return
+	}
+
+	if _, err = w.Write(b); err != nil {
+		h.handleError(w, errors.Wrap(err, "failed to write JSON response"))
+		return
+	}
+}
+
+func ReturnStatusOK(status int, w http.ResponseWriter) {
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(status)
 	_, _ = w.Write([]byte(`{"status": "OK"}`))

server/autolinkclient/client.go

@@ -6,11 +6,15 @@ import (
 	"fmt"
 	"io/ioutil"
 	"net/http"
+	"net/url"
 
 	"github.com/mattermost/mattermost-plugin-autolink/server/autolink"
 )
 
-const autolinkPluginID = "mattermost-autolink"
+const (
+	autolinkPluginID       = "mattermost-autolink"
+	AutolinkNameQueryParam = "autolinkName"
+)
 
 type PluginAPI interface {
 	PluginHTTP(*http.Request) *http.Response
@@ -45,22 +49,79 @@ func (c *Client) Add(links ...autolink.Autolink) error {
 			return err
 		}
 
-		req, err := http.NewRequest("POST", "/"+autolinkPluginID+"/api/v1/link", bytes.NewReader(linkBytes))
+		resp, err := c.call("/"+autolinkPluginID+"/api/v1/link", http.MethodPost, linkBytes, nil)
 		if err != nil {
 			return err
 		}
 
-		resp, err := c.Do(req)
+		if resp.StatusCode != http.StatusOK {
+			respBody, _ := ioutil.ReadAll(resp.Body)
+			return fmt.Errorf("unable to add the link %s. Error: %v, %v", link.Name, resp.StatusCode, string(respBody))
+		}
+	}
+
+	return nil
+}
+
+func (c *Client) Delete(links ...string) error {
+	for _, link := range links {
+		queryParams := url.Values{
+			AutolinkNameQueryParam: {link},
+		}
+
+		resp, err := c.call("/"+autolinkPluginID+"/api/v1/link", http.MethodDelete, nil, queryParams)
 		if err != nil {
 			return err
 		}
-		defer resp.Body.Close()
 
 		if resp.StatusCode != http.StatusOK {
 			respBody, _ := ioutil.ReadAll(resp.Body)
-			return fmt.Errorf("unable to install autolink. Error: %v, %v", resp.StatusCode, string(respBody))
+			return fmt.Errorf("unable to delete the link %s. Error: %v, %v", link, resp.StatusCode, string(respBody))
 		}
 	}
 
 	return nil
 }
+
+func (c *Client) Get(autolinkName string) ([]*autolink.Autolink, error) {
+	queryParams := url.Values{
+		AutolinkNameQueryParam: {autolinkName},
+	}
+
+	resp, err := c.call("/"+autolinkPluginID+"/api/v1/link", http.MethodGet, nil, queryParams)
+	if err != nil {
+		return nil, err
+	}
+
+	var respBody []byte
+	if resp.StatusCode != http.StatusOK {
+		respBody, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return nil, err
+		}
+		return nil, fmt.Errorf("unable to get the link %s. Error: %v, %v", autolinkName, resp.StatusCode, string(respBody))
+	}
+
+	var response []*autolink.Autolink
+	if err = json.Unmarshal(respBody, &response); err != nil {
+		return nil, err
+	}
+
+	return response, nil
+}
+
+func (c *Client) call(url, method string, body []byte, queryParams url.Values) (*http.Response, error) {
+	req, err := http.NewRequest(method, url, bytes.NewReader(body))
+	if err != nil {
+		return nil, err
+	}
+
+	req.URL.RawQuery = queryParams.Encode()
+
+	resp, err := c.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}