bogem/nehm

// Copyright 2016 Albert Nigmatzianov. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package api

import (
    "encoding/json"
    "strconv"

    "github.com/bogem/nehm/logs"
    "github.com/bogem/nehm/track"
)

const maxLimit = 200

func Favorites(limit uint, uid string) ([]track.Track, error) {
    p := NewPaginator(FormFavoritesURL(limit, uid))
    return p.NextPage()
}

func AllFavorites(uid string) ([]track.Track, error) {
    p := NewPaginator(FormFavoritesURL(maxLimit, uid))
    tracks := make([]track.Track, 0)

    for !p.OnLastPage() {
        favs, err := p.NextPage()
        tracks = append(tracks, favs...)
        if err == ErrForbidden {
            break
        }
        if err != nil {
            return tracks, err
        }
        if len(favs) == 0 {
            break
        }
    }

    return tracks, nil
}

type JSONUser struct {
    ID int `json:"id"`
}

func UID(permalink string) string {
    query := "url=http://soundcloud.com/" + permalink
    bUser, err := get(formResolveURL(query))
    if err != nil {
        logs.FATAL.Fatalln("there was a problem by resolving an id of user:", err)
    }

    var jUser JSONUser
    if err := json.Unmarshal(bUser, &jUser); err != nil {
        logs.FATAL.Fatalln("couldn't unmarshall JSON with user object:", err)
    }

    return strconv.Itoa(jUser.ID)
}

func TrackFromURL(url string) []track.Track {
    query := "url=" + url
    bTrack, err := get(formResolveURL(query))
    if err == ErrForbidden {
        logs.FATAL.Fatalln("you haven't got any access to this track:", err)
    }
    if err == ErrNotFound {
        logs.FATAL.Fatalln("you've entered invalid url:", err)
    }
    if err != nil {
        logs.FATAL.Fatalln("couldn't get track from url:", err)
    }

    var t track.Track
    if err := json.Unmarshal(bTrack, &t); err != nil {
        logs.FATAL.Fatalln("couldn't unmarshal JSON with track from URL:", err)
    }

    return []track.Track{t}
}