feat: Add support for update checks and notifications (#4810)

Co-authored-by: Kira Pilot <kira@coder.com>

codersdk/deploymentconfig.go

@@ -41,6 +41,7 @@ type DeploymentConfig struct {
 	Provisioner                     *ProvisionerConfig                      `json:"provisioner" typescript:",notnull"`
 	APIRateLimit                    *DeploymentConfigField[int]             `json:"api_rate_limit" typescript:",notnull"`
 	Experimental                    *DeploymentConfigField[bool]            `json:"experimental" typescript:",notnull"`
+	UpdateCheck                     *DeploymentConfigField[bool]            `json:"update_check" typescript:",notnull"`
 }
 
 type DERP struct {

codersdk/updatecheck.go

@@ -0,0 +1,37 @@
+package codersdk
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+)
+
+// UpdateCheckResponse contains information
+// on the latest release of Coder.
+type UpdateCheckResponse struct {
+	// Current is a boolean indicating whether the
+	// server version is the same as the latest.
+	Current bool `json:"current"`
+	// Version is the semantic version for the latest
+	// release of Coder.
+	Version string `json:"version"`
+	// URL to download the latest release of Coder.
+	URL string `json:"url"`
+}
+
+// UpdateCheck returns information about the latest release version of
+// Coder and whether or not the server is running the latest release.
+func (c *Client) UpdateCheck(ctx context.Context) (UpdateCheckResponse, error) {
+	res, err := c.Request(ctx, http.MethodGet, "/api/v2/updatecheck", nil)
+	if err != nil {
+		return UpdateCheckResponse{}, err
+	}
+	defer res.Body.Close()
+
+	if res.StatusCode != http.StatusOK {
+		return UpdateCheckResponse{}, readBodyAsError(res)
+	}
+
+	var buildInfo UpdateCheckResponse
+	return buildInfo, json.NewDecoder(res.Body).Decode(&buildInfo)
+}