File channels/radiobrowser.py artifact ef7c2e6649 part of check-in ecfcee7ed5

# encoding: UTF-8
# api: streamtuner2
# title: RadioBrowser
# description: Community collection of stations; votes, clicks, homepage links.
# version: 0.1
# type: channel
# url: http://www.radio-browser.info/
# category: radio
# priority: optional
# config:
#   { type=select, name=radiobrowser_cat, value=tags, select="tags|countries|languages", description=Which category types to list. }
# documentation: http://www.radio-browser.info/#ui-tabs-7
# png:
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# x-icon-src: openclipart:tape.png
# x-service-by: segler_alex
#
#
# Radio-Browser is a community-collected list of internet radios.
# Currently lists 4400 streaming stations, and tracks favourited
# entries. Furthermore includes station homepage links!
#
# Also has a neat JSON API, so is quite easy to support.


import re
import json
from config import *
from channels import *
import ahttp


# API endpoints:
# http://www.radio-browser.info/webservice/json/countries
# http://www.radio-browser.info/webservice/json/languages
# http://www.radio-browser.info/webservice/json/tags
# http://www.radio-browser.info/webservice/json/stations/topclick
# http://www.radio-browser.info/webservice/json/stations/topvote
# http://www.radio-browser.info/webservice/json/stations
# http://www.radio-browser.info/webservice/json/stations/searchterm
# http://www.radio-browser.info/webservice/json/stations/bytag/searchterm
#
# ENTRY sets:
# {"id":63,"name": "Energy Sachsen", "url":"http://www.energyradio.de/sachsen",
#  "homepage":"http://www.energy.de", "favicon":"http://www.energy.de/favicon.ico",
#  "tags":"Pop Dance RnB Techno","country":"Germany","subcountry":"","language":"German",
# "votes":4,"negativevotes":10},
#
class radiobrowser (ChannelPlugin):

    # control flags
    has_search = True
    listformat = "pls"
    titles = dict(listeners="Votes+", bitrate="Votes-", playing="Country")
    base = "http://www.radio-browser.info/webservice/json/"
    categories = []
    pricat = ("topvote", "topclick")
    catmap = { "tags": "bytag", "countries": "bycountry", "languages": "bylanguage" }
    

    # votes, and tags, no countries or languages
    def update_categories(self):
        self.categories = list(self.pricat)
        for sub in [conf.radiobrowser_cat]:
            cats = []
            for entry in self.api(sub):
                if entry["value"] and len(entry["value"]) > 1:
                    cats.append(entry["value"])
            self.categories.append(sub)
            self.categories.append(cats)
            

    # Direct mapping
    def update_streams(self, cat, search=None):

        if cat:
            if cat in self.pricat:
                data = self.api("stations/" + cat)
            elif cat in ("tags", "countries", "languages"):
                return [dict(genre="-", title="Placeholder category", url="offline:")]
            else:
                data = self.api("stations/" + self.catmap[conf.radiobrowser_cat] + "/" + cat)
        elif search:
            data = self.api("stations/" + search)
        else:
            return []

        r = []
        for e in data:
            r.append(dict(
                genre = e["tags"],
                url = e["url"],
                format = "audio/mpeg",
                title = e["name"],
                homepage = e["homepage"],
                playing = e["country"],
                listeners = int(e["votes"]),
                bitrate = - int(e["negativevotes"]),
            ))
        return r


    # fetch multiple pages
    def api(self, method, params={}):
        j = ahttp.get(self.base + method, params)
        try:
            return json.loads(j, strict=False)   # some entries contain invalid character encodings
        except:
            return []