dojox.data.GoogleBookSearchStore¶
| Project owner: | Shane O’Sullivan |
|---|---|
| since: | 1.2? |
dojox.data.GoogleBookSearchStore is a data store that uses Google APIs to search for books.
Introduction¶
dojox.data.GoogleBookSearchStore is a read only data store that can be used to search Google. It implements the ‘dojo.data.api.Read API <dojo/data/api/Read>’_, which you should refer to for general usage.
Usage¶
- The pattern of using the GoogleBookSearchStore is
- Instantiate the class, passing in whatever variables required, all of which are optional. These include:
- label The argument to use as the label. This is used when the getLabel function is called to retrieve the correct part of the data item. You generally shouldn’t set this.
- key Your Google API key. This is optional, and should only be used if you for some reason want Google to track the number of requests made by your code (for analytical purposes maybe)
- lang The language you want the results returned in. This defaults to the browsers’ language.
- urlPreventCache Specifies whether or not to forcibly prevent caching of results. This defaults to true.
- Call the fetch method, passing it the search query and the function to call when the query is completed. The only supported attribute of the query is text, the text to search for.
- Iterate over the results, calling the getValue function to retrieve values from each result item. The pieces of data in each result item are
- title The page title in HTML format
- titleNoFormatting The page title in plain text. This is the default field used as the label.
- authors An array of Author names
- url The URL for the item.
- unescapedUrl The URL for the item, with URL escaping. This is often more readable.
- bookId An identifier for the book, usually an ISBN
- pageCount The number of pages in the book.
- publishedYear The year of publication.
dojo.require("dojox.data.GoogleSearchStore");
var store = new dojox.data.GoogleBookSearchStore();
var query = {text: "Wheel of Time"};
var callbackFunction = function(/*Array*/ items){
console.log("Successfully retrieved " + items.length + " items for the query '" + query.text + "'");
dojo.forEach(items, function(item){
console.log ("Title is " + store.getValue(item, "title"));
console.log ("Author is " + store.getValue(item, "authors").join(", "));
console.log ("Url is " + store.getValue(item, "unescapedUrl"));
console.log ("Page Count " + store.getValue(item, "pageCount"));
})
};
var onErrorFunction = function(){
console.log("An error occurred getting Google Search data");
}
store.fetch({
query: query,
count: 20,
start: 0,
onComplete: callbackFunction,
onError: onErrorFunction
});
Examples¶
Programmatic example¶
dojo.require("dojox.data.GoogleSearchStore");
function doSearch(){
var store = new dojox.data.GoogleBookSearchStore();
var query = {text: dojo.byId("searchInput").value};
var callbackFunction = function(/*Array*/ items){
var table = dojo.byId("resultTable");
var tableBody = table.tBodies[0];
dojo.empty(tableBody);
// Show the table
dojo.style(table, "display", "");
var emptyArr = [];
dojo.forEach(items, function(item, index){
var row = dojo.create("tr", {}, tableBody);
var numberCell = dojo.create("td", {innerHTML: index}, row);
var authors = store.getValue(item, "authors") || emptyArr;
if(!dojo.isArray(authors)){
authors = [authors];
}
dojo.create("td", {innerHTML: store.getValue(item, "titleNoFormatting")}, row);
dojo.create("td", {innerHTML: authors.join(", ") }, row);
dojo.create("td", {innerHTML: store.getValue(item, "pageCount") }, row);
var urlCell = dojo.create("td", {}, row);
dojo.create("a", {
href: store.getValue(item, "unescapedUrl"),
innerHTML: "Link",
target: "_blank"
}, urlCell);
})
};
var onErrorFunction = function(){
console.log("An error occurred getting Google Search data");
}
store.fetch({
query: query,
count: 20,
start: 0,
onComplete: callbackFunction,
onError: onErrorFunction
});
console.log("called fetch with query", query);
}
<div>
<span>Enter Search Text</span>
<input type="text" value="Wheel of Time" id="searchInput">
<button onclick="doSearch()">Search</button>
</div>
<table id="resultTable" style="border: 1px solid black; display: none;">
<thead>
<th>#</th>
<th>Title</th>
<th>Authors</th>
<th>Page Count</th>
<th>Link</th>
</thead>
<tbody>
</tbody>
</table>