Restructured code, moved all modules into internal

For now all modules are considered internal. This might change later

internal/backends/funkwhale/client.go

@@ -0,0 +1,110 @@
+/*
+Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+package funkwhale
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/go-resty/resty/v2"
+)
+
+const MaxItemsPerGet = 50
+const DefaultRateLimitWaitSeconds = 5
+
+type Client struct {
+	HttpClient *resty.Client
+	token      string
+}
+
+func NewClient(serverUrl string, token string) Client {
+	client := resty.New()
+	client.SetBaseURL(serverUrl)
+	client.SetAuthScheme("Bearer")
+	client.SetAuthToken(token)
+	client.SetHeader("Accept", "application/json")
+
+	// Handle rate limiting (see https://docs.funkwhale.audio/developer/api/rate-limit.html)
+	client.SetRetryCount(5)
+	client.AddRetryCondition(
+		func(r *resty.Response, err error) bool {
+			code := r.StatusCode()
+			return code == http.StatusTooManyRequests || code >= http.StatusInternalServerError
+		},
+	)
+	client.SetRetryMaxWaitTime(time.Duration(1 * time.Minute))
+	client.SetRetryAfter(func(client *resty.Client, resp *resty.Response) (time.Duration, error) {
+		var err error
+		var retryAfter int = DefaultRateLimitWaitSeconds
+		if resp.StatusCode() == http.StatusTooManyRequests {
+			retryAfter, err = strconv.Atoi(resp.Header().Get("Retry-After"))
+			if err != nil {
+				retryAfter = DefaultRateLimitWaitSeconds
+			}
+		}
+		return time.Duration(retryAfter * int(time.Second)), err
+	})
+
+	return Client{
+		HttpClient: client,
+		token:      token,
+	}
+}
+
+func (c Client) GetHistoryListenings(user string, page int, perPage int) (result ListeningsResult, err error) {
+	const path = "/api/v1/history/listenings"
+	response, err := c.HttpClient.R().
+		SetQueryParams(map[string]string{
+			"username":  user,
+			"page":      strconv.Itoa(page),
+			"page_size": strconv.Itoa(perPage),
+			"ordering":  "-creation_date",
+		}).
+		SetResult(&result).
+		Get(path)
+
+	if response.StatusCode() != 200 {
+		err = errors.New(response.String())
+		return
+	}
+	return
+}
+
+func (c Client) GetFavoriteTracks(page int, perPage int) (result FavoriteTracksResult, err error) {
+	const path = "/api/v1/favorites/tracks"
+	response, err := c.HttpClient.R().
+		SetQueryParams(map[string]string{
+			"page":      strconv.Itoa(page),
+			"page_size": strconv.Itoa(perPage),
+			"ordering":  "-creation_date",
+		}).
+		SetResult(&result).
+		Get(path)
+
+	if response.StatusCode() != 200 {
+		err = errors.New(response.String())
+		return
+	}
+	return
+}