all: implement server and client for dictionary API

Currently the server and client can onyl handle API for looking up
definitions of the words through "/api/definisi" URL.

1 files changed, 92 insertions, 0 deletions

diff --git a/api_client.go b/api_client.go
new file mode 100644
index 0000000..eb1c2f7
--- /dev/null
+++ b/api_client.go
@@ -0,0 +1,92 @@
+// Copyright 2020, Shulhan <m.shulhan@gmail.com>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package kbbi
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"strings"
+)
+
+//
+// apiClient is client that connect to cached server API.
+//
+type apiClient struct {
+	url  string
+	conn *http.Client
+}
+
+//
+// newAPIClient create a new client for server API.
+// If url is empty it will use default server API.
+//
+func newAPIClient(url string) (client *apiClient) {
+	if len(url) == 0 {
+		url = defServerAPI
+	}
+
+	client = &apiClient{
+		url: url,
+		conn: &http.Client{
+			Timeout: defTimeout,
+		},
+	}
+
+	return client
+}
+
+//
+// Lookup the definition of words through server API.
+//
+func (client *apiClient) CariDefinisi(words []string) (
+	res DefinisiResponse, err error,
+) {
+	if len(words) == 0 {
+		return nil, nil
+	}
+
+	params := url.Values{}
+	params.Set(paramNameKata, strings.Join(words, ","))
+
+	req, err := http.NewRequest(http.MethodGet, client.url+pathAPIDefinisi, nil)
+	if err != nil {
+		return nil, fmt.Errorf("CariDefinisi: %w", err)
+	}
+
+	req.URL.RawQuery = params.Encode()
+
+	httpRes, err := client.conn.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("CariDefinisi: %w", err)
+	}
+
+	resBody, err := ioutil.ReadAll(httpRes.Body)
+	if err != nil {
+		return nil, fmt.Errorf("CariDefinisi: %w", err)
+	}
+
+	defer httpRes.Body.Close()
+
+	if len(resBody) == 0 {
+		return res, nil
+	}
+
+	err = res.unpack(resBody)
+	if err != nil {
+		return nil, fmt.Errorf("CariDefinisi: %w", err)
+	}
+
+	return res, nil
+}
+
+//
+// ListKataDasar list all of the root words in dictionary.
+//
+func (client *apiClient) ListKataDasar() (res DaftarKata, err error) {
+	//TODO: return cached list.
+	return res, nil
+}