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authorAryadev Chavali <aryadevchavali1@gmail.com>2019-02-04 00:24:32 +0000
committerAryadev Chavali <aryadevchavali1@gmail.com>2019-02-04 00:24:32 +0000
commit216629800e8af7fe2582ea53cf59de82026184bb (patch)
treed081e0f3c4d787c5b1e4a9e4fa3cfde5a25ffec9 /Aggregator/Parser/ParserService.cs
parent5f1278fb32f12cdfa0634dc9d8ed6f8b551f4e49 (diff)
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Changed class name
Diffstat (limited to 'Aggregator/Parser/ParserService.cs')
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diff --git a/Aggregator/Parser/ParserService.cs b/Aggregator/Parser/ParserService.cs
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+using System;
+using System.Linq;
+using System.Xml.Linq;
+using System.Collections.Generic;
+using Aggregator.Classes;
+
+namespace Aggregator.Parser {
+ /// <summary>
+ /// Class to provide Parsing services
+ /// </summary>
+ public static class Parser {
+
+ /// <summary>
+ /// Parse a single xml code, given a config, to Articles
+ /// </summary>
+ /// <param name="xml">XML code from an RSS feed</param>
+ /// <param name="config">Config that tells parser where to get relevant information</param>
+ /// <returns>Parsed articles from XML code</returns>
+ public static IEnumerable<Article> Parse(string xml, Config config) {
+
+ return XDocument.Parse(xml).Descendants("item") //make an XDocument out of the xml
+ .Select(articles => articles.Descendants().ToArray()) //turn each 'item' into it's respective descendants
+ .Select(article => new Article() //make a new article from each 'item' article, using config for pointers
+ {
+ Source = config.Source,
+ Title = article[config.Title].Value,
+ Description = article[config.Description].Value,
+ ArticleLink = article[config.ArticleLink].Value,
+ ImageLink = article[config.ImageLink].Attribute("url").Value,
+ PublishDate = DateTime.Parse(article[config.PublishDate].Value)
+ }).Distinct(); //remove any duplicates
+ }
+
+ /// <summary>
+ /// Parse multiple xml sets, given a similar set of configs, to Articles
+ /// </summary>
+ /// <param name="xmls">Array of XML sets to parse for Articles</param>
+ /// <param name="configs">List of configs to parse for corresponding xml sets</param>
+ /// <returns>Parsed articles from every XML set</returns>
+ public static IEnumerable<Article> ParseMultiple(string[] xmls, List<Config> configs) {
+ if (configs.Count == 0 || xmls.Length == 0 || (xmls.Length != configs.Count)) {
+ return null; //for bad cases
+ }
+ else {
+ return xmls.Select((xml, index) => Parse(xml, configs[index])) //Parse each item
+ .SelectMany(i => i); //remove distinctions between each set of articles
+ }
+ }
+ }
+} \ No newline at end of file