From 3a38245a6a418b2ddbe4dfcd916ab83708b6f500 Mon Sep 17 00:00:00 2001
From: Shulhan <ms@kilabit.info>
Date: Sun, 22 May 2022 21:47:09 +0700
Subject: all: implement HTTP API to fetch list of block.d

Given the following request,

  GET /api/block.d

It will return list of hosts in block.d as JSON format:

	{
		"data": {
			"<name>": <Blockd>
			...
		}
	}
---
 client.go | 27 +++++++++++++++++++++++++++
 httpd.go  | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)

diff --git a/client.go b/client.go
index 53e057b..480fe53 100644
--- a/client.go
+++ b/client.go
@@ -33,6 +33,33 @@ func NewClient(serverUrl string, insecure bool) (cl *Client) {
 	return cl
 }
 
+// Blockd return list of all block.d files on the server.
+func (cl *Client) Blockd() (hostBlockd map[string]*Blockd, err error) {
+	var (
+		logp = "Blockd"
+		res  = libhttp.EndpointResponse{}
+
+		resb []byte
+	)
+
+	_, resb, err = cl.Get(apiBlockd, nil, nil)
+	if err != nil {
+		return nil, fmt.Errorf("%s: %w", logp, err)
+	}
+
+	res.Data = &hostBlockd
+
+	err = json.Unmarshal(resb, &res)
+	if err != nil {
+		return nil, fmt.Errorf("%s: %w", logp, err)
+	}
+	if res.Code != http.StatusOK {
+		return nil, fmt.Errorf("%s: %d %s", logp, res.Code, res.Message)
+	}
+
+	return hostBlockd, nil
+}
+
 // BlockdDisable disable specific hosts on block.d.
 func (cl *Client) BlockdDisable(blockdName string) (an interface{}, err error) {
 	var (
diff --git a/httpd.go b/httpd.go
index 3f8964d..389bc1f 100644
--- a/httpd.go
+++ b/httpd.go
@@ -118,6 +118,17 @@ func (srv *Server) httpdRegisterEndpoints() (err error) {
 		return err
 	}
 
+	err = srv.httpd.RegisterEndpoint(&libhttp.Endpoint{
+		Method:       libhttp.RequestMethodGet,
+		Path:         apiBlockd,
+		RequestType:  libhttp.RequestTypeNone,
+		ResponseType: libhttp.ResponseTypeJSON,
+		Call:         srv.httpApiBlockdList,
+	})
+	if err != nil {
+		return err
+	}
+
 	err = srv.httpd.RegisterEndpoint(&libhttp.Endpoint{
 		Method:       libhttp.RequestMethodPost,
 		Path:         apiBlockd,
@@ -301,6 +312,34 @@ func (srv *Server) httpdRun() {
 	}
 }
 
+// httpApiBlockdList fetch the list of block.d files.
+//
+// # Request
+//
+//	GET /api/block.d
+//
+// # Response
+//
+// On success it will return list of hosts in block.d,
+//
+//	{
+//		"data": {
+//			"<name>": <Blockd>
+//			...
+//		}
+//	}
+func (srv *Server) httpApiBlockdList(epr *libhttp.EndpointRequest) (resBody []byte, err error) {
+	var (
+		res = libhttp.EndpointResponse{}
+	)
+
+	res.Code = http.StatusOK
+	res.Data = srv.env.HostBlockd
+
+	resBody, err = json.Marshal(&res)
+	return resBody, err
+}
+
 // httpApiBlockdDisable disable the hosts block.d.
 func (srv *Server) httpApiBlockdDisable(epr *libhttp.EndpointRequest) (resBody []byte, err error) {
 	var (
-- 
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