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From Michael Lenahan <michael.lena...@gmail.com>
Subject Re: georss atom feed
Date Sat, 24 Jul 2010 09:33:30 GMT
Thanks everyone. Looks like my task for today is to learn git:
http://progit.org/book/.

On 24 July 2010 02:30, J Chris Anderson <jchris@gmail.com> wrote:
>
> On Jul 23, 2010, at 12:23 PM, Michael Lenahan wrote:
>
>> Thanks, jchris!
>>
>> I now have this:
>> http://mick.couchone.com/blog/_design/geosofa/_list/index/recent-posts?descending=true&limit=10&format=atom
>>
>> And this is what it looks like in Google Maps:
>> http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=http:%2F%2Fmick.couchone.com%2Fblog%2F_design%2Fgeosofa%2F_list%2Findex%2Frecent-posts%3Fdescending%3Dtrue%26limit%3D10%26format%3Datom&sll=37.0625,-95.677068&sspn=35.547176,56.513672&ie=UTF8&z=3
>>
>
> This is super amazing.
>
> If you are willing to share your changes back to the world via git, I'm sure people will
dig in and help you refine this even further.
>
> Thanks so much for sharing it makes me really happy to see people pushing the boundaries
like this.
>
> Chris
>
>> Here's what I did:
>>
>> I copied sofa into a new folder geosofa, and made these changes:
>>
>> (at the end of vendor/couchapp/lib/atom.js)
>>
>> exports.header = function(data) {
>>  //
>>  //var f = <feed xmlns="http://www.w3.org/2005/Atom"/>;
>>  var f = <feed xmlns="http://www.w3.org/2005/Atom"
>> xmlns:georss="http://www.georss.org/georss"/>;
>>  //
>>  f.title = data.title;
>>  f.id = data.feed_id;
>>  f.link.@href = data.feed_link;
>>  f.link.@rel = "self";
>>  f.generator = "CouchApp on CouchDB";
>>  f.updated = rfc3339(data.updated);
>>  return f.toXMLString().replace(/\<\/feed\>/,'');
>> };
>>
>> exports.entry = function(data) {
>>  var entry = <entry/>;
>>  entry.id = data.entry_id;
>>  entry.title = data.title;
>>  entry.content = data.content;
>>  entry.content.@type = (data.content_type || 'html');
>>  entry.updated = rfc3339(data.updated);
>>  entry.author = <author><name>{data.author}</name></author>;
>>  entry.link.@href = data.alternate;
>>  entry.link.@rel = "alternate";
>>  //
>>  entry.point = data.point;
>>  //
>>  return entry;
>> }
>>
>> (at the end of lists/index.js)
>>
>>          alternate : path.absolute(path.show('post', row.id)),
>>          //
>>          //point : row.value.loc[1] + " " + row.value.loc[0]
>>          point : row.value.latitude + " " + row.value.longitude
>>          //
>>        });
>>        // send the entry to client
>>        send(feedEntry);
>>      } while (row = getRow());
>>    }
>>
>>    // close the loop after all rows are rendered
>>    return "</feed>";
>>  });
>> };
>>
>> (I also made the following rudimentary changes to templates/edit.html)
>>
>>    <!-- form to create a post -->
>>    <form id="new-post" action="new.html" method="post">
>>      <h1>{{pageTitle}}</h1>
>>        <!-- amended for geosofa -->
>>        <p><label>Place Name</label>
>>          <input type="text" size="50" name="title" value=""></p>
>>        <p><label>Latitude</label>
>>          <input type="text" size="50" name="latitude" value=""></p>
>>        <p><label>Longitude</label>
>>          <input type="text" size="50" name="longitude" value=""></p>
>>        <!-- -->
>>
>> Some issues:
>>
>> 1. I wasn't able to edit atom.js to make it take account of the full
>> name for georss:point
>>
>> entry.georss:point = data.point
>>
>> I tried backslash-escaping, quoting, square brackets etc but with no luck.
>>
>> In the end I settled with "point" (without the namespace). It works
>> but it's a bit wrong.
>>
>> 2. I started by saving the data in an array called "loc", since this
>> is the way suggested by Volker
>> (http://vmx.cx/cgi-bin/blog/index.cgi/geocouch-the-future-is-now:2010-05-03:en,CouchDB,Python,Erlang,geo)
>> and more in line with geojson.
>>
>> However, I've been tripped up by my lack of knowledge in couchapp - I
>> don't know how to write from my couchapp into an array, whereas
>> writing into separate latitude, longitude fields was very easy - just
>> a matter of adding the text input tags to templates/edit.html
>>
>> Thanks very much. Couchapp is simply amazing.
>>
>> Michael
>>
>> On 22 July 2010 21:34, J Chris Anderson <jchris@couch.io> wrote:
>>>
>>> On Jul 22, 2010, at 1:27 PM, Michael Lenahan wrote:
>>>
>>>> Hi there - I'm looking to find ways to get CouchDB to serve georss (in this
>>>> case, a point with latitude and longitude).
>>>>
>>>> I'm taking sofa as my starting point, because it has atom feed capability
>>>> built in.
>>>>
>>>> So, sofa can generate this:
>>>> http://mick.couchone.com/blog/_design/sofa/_list/index/recent-posts?descending=true&limit=10&format=atom
>>>>
>>>> In the couchapp files on my local machine I'm looking to amend
>>>> sofa/lists/index.js so that the feed entry includes georss:point as
>>>> specified here:
>>>> http://www.georss.org/simple#Point
>>>>
>>>> Currently the relevant part of sofa/lists/index.js looks like this:
>>>>
>>>>        // generate the entry for this row
>>>>        var feedEntry = Atom.entry({
>>>>          entry_id :
>>>> path.absolute('/'+encodeURIComponent(req.info.db_name)+'/'+encodeURIComponent(
>>>> row.id)),
>>>>          title : row.value.title,
>>>>          content : html,
>>>>          updated : new Date(row.value.created_at),
>>>>          author : row.value.author,
>>>>          alternate : path.absolute(path.show('post', row.id))
>>>>        });
>>>>
>>>
>>> you will need to modify atom.js to add the proper xml to the output.
>>>
>>> http://github.com/jchris/sofa/blob/master/vendor/couchapp/lib/atom.js#L32
>>>
>>> You should just copy this to your app's lib folder (I probably never should have
put it in vendor in the first place, no other app uses it, I think).
>>>
>>> I don't know geo rss well enough but if it indeed RSS not Atom you will probably
need to use atom.js as a starting point to write your own XML generator.
>>>
>>>
>>>
>>>> Has anyone out there done this already? Specifically I wonder how to handle
>>>> the fact of georss:point containing a colon and getting that to work in the
>>>> js file.
>>>>
>>>> Also - apologies if this is a dumb question - is it simply a matter of
>>>> including latitude and longitude in my couchdb database, then concatenating
>>>> these at the correct position in this js file -
>>>>
>>>> georss:point : row.value.latitude + ' ' + row.value.longitude
>>>>
>>>
>>> for this, you can quote the keys, like: "georss:point"
>>>
>>>> - or are there other things I need to consider before referencing these db
>>>> elements?
>>>>
>>>> Thanks!
>>>>
>>>> Michael
>>>
>>>
>
>

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