This isn't so much a question abut AngularJS as it is about the Wikimedia and Wikidata query API's.
Although I am trying to display the content of a Wikipedia article in AngularJS after doing a certain query that isn't the problem. I already know how to display it... the problem is the search for an article or articles.
I'm trying to query Wikipedia by historical event date as well as by geo-location.
Let's pick a random event, any event. Let's say "1986 Mozambican Tupolev Tu-134 crash". Link: http://en.wikipedia.org/wiki/1986_Mozambican_Tupolev_Tu-134_crash
From the article, I can see the exact date: 19 October 1986
as well as the geo-location of the event: -25.911389, 31.957222
I'm trying to build a search in AngularJS that can use either a date-range and/or geolocation coordinates to find an event.
I am aware that mediawiki has a geolocation API now, and I am able to find the above event by either keyword or coordinates. The result also turns up any other articles that exist within a certain radius around it using this:
However, there is no way to do a search with mediawiki by a point in time or the date of the event.
Wikidata on the other hand has two methods of searching data... it has a date range as well as geolocation.
However, when a query is run, I have no idea what is being returned.
For example, when I use this query string:
https://wdq.wmflabs.org/api?q=AROUND[625,-25.911389,31.957222,5]%20AND%20BETWEEN[585,1985,1987]
it returns this:
{"status":{"error":"OK","items":1,"querytime":"544ms","parsed_query":"(AROUND[625,-25.9114,31.9572,5] AND BETWEEN[585,+00000001985-00-00T00:00:00Z,+00000001987-00-00T00:00:00Z])"},"items":[950273]}
Using wikidata's query tool:
I can see that 950273 represents the article in some way. I'm just not sure how to use that to direct me to the actual article in wikipedia.
I don't know what "items": [950273]" represents, or how to use it to get me to the wikipedia article and display the contents of that article in AngularJS.
Is there a way to do both a query by date of the historical event as well as by geolocation. Either by using mediawiki or wikidata or a combination of the two?
EDIT: This is the solution to my question above. It seems like a bit of a hack... but it works. Good enough for now. Here is my controller.
.controller('WikiQueryCtrl', ['$scope', '$http', function($scope, $http) {
$http({
//these geo coordinates and the date ranges will eventually be dynamic.
url: 'https://wdq.wmflabs.org/api?q=AROUND[625,-25.911389,31.957222,5]%20AND%20BETWEEN[585,1985,1987]&callback=JSON_CALLBACK',
method: 'jsonp'
})
.success(function(response) {
var items = response.items;
$scope.jason = items;
var wikiDataString = 'http://www.wikidata.org/w/api.php?action=wbgetentities&format=json&ids=Q' + items + '&props=sitelinks%7Csitelinks%2Furls&callback=JSON_CALLBACK';
$http({
url: wikiDataString,
method: 'jsonp'
})
.success(function(response2) {
$scope.jason2 = response2;
var url = response2.entities["Q" + items].sitelinks.enwiki.url;
var wikipediaTitle = url.substr(24, url.length);
var wikipediaURL = 'http://en.wikipedia.org/w/api.php?action=query&prop=extracts|info&exintro&titles=' + wikipediaTitle + '&format=json&explaintext&redirects&inprop=url&indexpageids&format=json&callback=JSON_CALLBACK';
$http({
url: wikipediaURL,
method: 'jsonp'
}).success(function(response4) {
var query = response4.query;
var pageID = response4.query.pageids;
var title = response4.query.pages[pageID].title;
var fullurl = response4.query.pages[pageID].fullurl;
var content = response4.query.pages[pageID].extract;
$scope.title = title;
$scope.content = content;
$scope.fullurl = fullurl;
$scope.jason = query;
});
});
});
}]);
950273 is the Wikidata entity ID. You find the entity itself at https://www.wikidata.org/wiki/Q950273
By using that you can query Wikidata for the articles connected to it using the API and the action wbgetentities and ask for sitelinks and sitelinks/url like this: http://wikidata.org/w/api.php?action=wbgetentities&format=json&ids=Q950273&props=sitelinks%7Csitelinks%2Furls
Or try going to the language version of your choice directly using Special:GoToLinkedPage. Eg. https://www.wikidata.org/wiki/Special:GoToLinkedPage/enwiki/Q950273
来源：https://stackoverflow.com/questions/29811410/mediawiki-query-and-or-wikidataquery-to-find-wikipedia-article