Commit 134f4eda authored by Romain Courteaud's avatar Romain Courteaud Committed by Alain Takoudjou

ParserStorage: extract data from RSS/OPML.

Thanks to Alain Takoudjou <alain.takoudjou@nexedi.com> for his original work on this topic.

Conflicts:
	test/tests.html
parent 28983ea6
......@@ -169,6 +169,7 @@ module.exports = function (grunt) {
'src/jio.storage/uuidstorage.js',
'src/jio.storage/memorystorage.js',
'src/jio.storage/zipstorage.js',
'src/jio.storage/parserstorage.js',
'src/jio.storage/httpstorage.js',
'src/jio.storage/dropboxstorage.js',
'src/jio.storage/davstorage.js',
......
/*jslint nomen: true*/
/*global jIO, DOMParser */
(function (jIO, DOMParser) {
"use strict";
/////////////////////////////////////////////////////////////
// OPML Parser
/////////////////////////////////////////////////////////////
function OPMLParser(txt) {
this._dom_parser = new DOMParser().parseFromString(txt, 'text/xml');
}
OPMLParser.prototype.parseHead = function () {
// fetch all children instead
var channel_element = this._dom_parser.querySelector("opml > head"),
tag_element,
i,
result = {};
for (i = channel_element.childNodes.length - 1; i >= 0; i -= 1) {
tag_element = channel_element.childNodes[i];
result[tag_element.tagName] = tag_element.textContent;
}
return result;
};
OPMLParser.prototype.parseOutline = function (result_list, outline_element,
prefix, include, id) {
var attribute,
i,
child,
result = {};
if ((id === prefix) || (id === undefined)) {
result_list.push({
id: prefix,
value: {}
});
if (include) {
for (i = outline_element.attributes.length - 1; i >= 0; i -= 1) {
attribute = outline_element.attributes[i];
if (attribute.value) {
result[attribute.name] = attribute.value;
}
}
result_list[result_list.length - 1].doc = result;
}
}
for (i = outline_element.childNodes.length - 1; i >= 0; i -= 1) {
child = outline_element.childNodes[i];
if (child.tagName === 'outline') {
this.parseOutline(result_list, child, prefix + '/' + i, include, id);
}
}
};
OPMLParser.prototype.getDocumentList = function (include, id) {
var result_list,
item_list = this._dom_parser.querySelectorAll("body > outline"),
i;
if ((id === '/0') || (id === undefined)) {
result_list = [{
id: '/0',
value: {}
}];
if (include) {
result_list[0].doc = this.parseHead();
}
} else {
result_list = [];
}
for (i = 0; i < item_list.length; i += 1) {
this.parseOutline(result_list, item_list[i], '/1/' + i, include, id);
}
return result_list;
};
/////////////////////////////////////////////////////////////
// RSS Parser
/////////////////////////////////////////////////////////////
function RSSParser(txt) {
this._dom_parser = new DOMParser().parseFromString(txt, 'text/xml');
}
RSSParser.prototype.parseElement = function (element) {
var tag_element,
i,
j,
attribute,
result = {};
for (i = element.childNodes.length - 1; i >= 0; i -= 1) {
tag_element = element.childNodes[i];
if (tag_element.tagName !== 'item') {
result[tag_element.tagName] = tag_element.textContent;
for (j = tag_element.attributes.length - 1; j >= 0; j -= 1) {
attribute = tag_element.attributes[j];
if (attribute.value) {
result[tag_element.tagName + '_' + attribute.name] =
attribute.value;
}
}
}
}
return result;
};
RSSParser.prototype.getDocumentList = function (include, id) {
var result_list,
item_list = this._dom_parser.querySelectorAll("rss > channel > item"),
i;
if ((id === '/0') || (id === undefined)) {
result_list = [{
id: '/0',
value: {}
}];
if (include) {
result_list[0].doc = this.parseElement(
this._dom_parser.querySelector("rss > channel")
);
}
} else {
result_list = [];
}
for (i = 0; i < item_list.length; i += 1) {
if ((id === '/0/' + i) || (id === undefined)) {
result_list.push({
id: '/0/' + i,
value: {}
});
if (include) {
result_list[result_list.length - 1].doc =
this.parseElement(item_list[i]);
}
}
}
return result_list;
};
/////////////////////////////////////////////////////////////
// Helpers
/////////////////////////////////////////////////////////////
var parser_dict = {
'rss': RSSParser,
'opml': OPMLParser
};
function getParser(storage) {
return storage._sub_storage.getAttachment(storage._document_id,
storage._attachment_id,
{format: 'text'})
.push(function (txt) {
return new parser_dict[storage._parser_name](txt);
});
}
/////////////////////////////////////////////////////////////
// Storage
/////////////////////////////////////////////////////////////
function ParserStorage(spec) {
this._attachment_id = spec.attachment_id;
this._document_id = spec.document_id;
this._parser_name = spec.parser;
this._sub_storage = jIO.createJIO(spec.sub_storage);
}
ParserStorage.prototype.hasCapacity = function (capacity) {
return (capacity === "list") || (capacity === 'include');
};
ParserStorage.prototype.buildQuery = function (options) {
if (options === undefined) {
options = {};
}
return getParser(this)
.push(function (parser) {
return parser.getDocumentList((options.include_docs || false));
});
};
ParserStorage.prototype.get = function (id) {
return getParser(this)
.push(function (parser) {
var result_list = parser.getDocumentList(true, id);
if (result_list.length) {
return result_list[0].doc;
}
throw new jIO.util.jIOError(
"Cannot find parsed document: " + id,
404
);
});
};
jIO.addStorage('parser', ParserStorage);
}(jIO, DOMParser));
\ No newline at end of file
This diff is collapsed.
......@@ -41,9 +41,7 @@
<script src="jio.storage/uuidstorage.tests.js"></script>
<script src="jio.storage/replicatestorage.tests.js"></script>
<script src="jio.storage/shastorage.tests.js"></script>
<script src="jio.storage/rssfeedstorage.test.js"></script>
<script src="jio.storage/opmlstorage.tests.js"></script>
<script src="jio.storage/parserstorage.tests.js"></script>
<!--script src="jio.storage/qiniustorage.tests.js"></script-->
<!--script src="jio.storage/indexstorage.tests.js"></script-->
<script src="jio.storage/cryptstorage.tests.js"></script>
......
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