| | | 1 | | namespace ValidateLib.IRINormalization |
| | | 2 | | { |
| | | 3 | | /// <summary> |
| | | 4 | | /// Provides methods for normalizing IRIs. |
| | | 5 | | /// </summary> |
| | | 6 | | public class IRINormalizator |
| | | 7 | | { |
| | | 8 | | /// <summary> |
| | | 9 | | /// Normalizes absolute IRI. |
| | | 10 | | /// </summary> |
| | | 11 | | /// <param name="IRI"> absolute iri</param> |
| | | 12 | | /// <returns> normalized absolute iri</returns> |
| | | 13 | | public static string NormalizeIri(string IRI) |
| | | 14 | | { |
| | 1 | 15 | | var uri = new Uri(IRI, UriKind.Absolute); |
| | 1 | 16 | | return uri.ToString(); |
| | | 17 | | } |
| | | 18 | | |
| | | 19 | | /// <summary> |
| | | 20 | | /// Turns url into absolute using base url. |
| | | 21 | | /// </summary> |
| | | 22 | | /// <param name="url"> Url to be turned into absolute. </param> |
| | | 23 | | /// <param name="baseUrl"> Base url. </param> |
| | | 24 | | /// <returns></returns> |
| | | 25 | | public static string TurnUrlIntoAbsoluteUsingBase(string url, string baseUrl) |
| | | 26 | | { |
| | 1 | 27 | | string normalizedUrl = baseUrl + url; |
| | 1 | 28 | | return NormalizeIri(normalizedUrl); |
| | | 29 | | |
| | | 30 | | } |
| | | 31 | | |
| | | 32 | | /// <summary> |
| | | 33 | | /// Extracts base url from url. |
| | | 34 | | /// </summary> |
| | | 35 | | /// <param name="fileURL"> url from which we want to extract the base part. </param> |
| | | 36 | | /// <returns></returns> |
| | | 37 | | public static string GetBaseUrl(string fileURL) |
| | | 38 | | { |
| | 1 | 39 | | string fileName = Path.GetFileName(fileURL); |
| | 1 | 40 | | return fileURL.Replace(fileName, string.Empty); |
| | | 41 | | } |
| | | 42 | | |
| | | 43 | | /// <summary> |
| | | 44 | | /// Turns url into absolute using another url that references it. |
| | | 45 | | /// </summary> |
| | | 46 | | /// <param name="referencingUrl"> referencing url, typically the url of metadata file</param> |
| | | 47 | | /// <param name="targetUrl"> url to turn into absolute </param> |
| | | 48 | | /// <returns></returns> |
| | | 49 | | public static string TurnUrlIntoAbsoluteWithReferencedUrl(string referencingUrl, string targetUrl) |
| | | 50 | | { |
| | 1 | 51 | | if (IsAbsoluteUrl(targetUrl)) |
| | | 52 | | { |
| | 1 | 53 | | return targetUrl; |
| | | 54 | | } |
| | | 55 | | else |
| | | 56 | | { |
| | 1 | 57 | | return TurnUrlIntoAbsoluteUsingBase(targetUrl, GetBaseUrl(referencingUrl)); |
| | | 58 | | } |
| | | 59 | | } |
| | | 60 | | |
| | | 61 | | /// <summary> |
| | | 62 | | /// Turns url into absolute with base. Also checks whether the url is already absolute. |
| | | 63 | | /// </summary> |
| | | 64 | | /// <param name="baseURL"> base url</param> |
| | | 65 | | /// <param name="targetUrl"> url to be turned into absolute</param> |
| | | 66 | | /// <returns> absolute url created from <paramref name="targetUrl"/></returns> |
| | | 67 | | public static string TurnUrlIntoAbsoluteWithBase(string baseURL, string targetUrl) |
| | | 68 | | { |
| | 1 | 69 | | if (IsAbsoluteUrl(targetUrl)) |
| | | 70 | | { |
| | 0 | 71 | | return targetUrl; |
| | | 72 | | } |
| | | 73 | | else |
| | | 74 | | { |
| | 1 | 75 | | return TurnUrlIntoAbsoluteUsingBase(targetUrl, baseURL); |
| | | 76 | | } |
| | | 77 | | } |
| | | 78 | | /// <summary> |
| | | 79 | | /// normalzies url for link property |
| | | 80 | | /// </summary> |
| | | 81 | | /// <param name="url"> url to be normalized </param> |
| | | 82 | | /// <param name="baseUrl"> base url against which the normalization is done </param> |
| | | 83 | | /// <returns></returns> |
| | | 84 | | public static string NormalizeUrlForLinkProperty(string url, string baseUrl) |
| | | 85 | | { |
| | 1 | 86 | | string normalizedUrl = url; |
| | 1 | 87 | | if (!IsAbsoluteUrl(url)) |
| | | 88 | | { |
| | 1 | 89 | | normalizedUrl = TurnUrlIntoAbsoluteUsingBase(url, baseUrl); |
| | 1 | 90 | | normalizedUrl = NormalizeIri(normalizedUrl); |
| | | 91 | | } |
| | 1 | 92 | | return normalizedUrl; |
| | | 93 | | } |
| | | 94 | | /// <summary> |
| | | 95 | | /// Checks whether an url is absolute |
| | | 96 | | /// </summary> |
| | | 97 | | /// <param name="iri"> iri to be checked</param> |
| | | 98 | | /// <returns> true if <paramref name="iri"/> is absolute IRI . </returns> |
| | | 99 | | public static bool IsAbsoluteUrl(string iri) |
| | | 100 | | { |
| | 1 | 101 | | if (Uri.TryCreate(iri, UriKind.Absolute, out Uri? uri)) |
| | | 102 | | { |
| | 1 | 103 | | if (uri.Scheme == Uri.UriSchemeFile) |
| | | 104 | | { |
| | 1 | 105 | | return !string.IsNullOrEmpty(uri.Scheme); |
| | | 106 | | } |
| | 1 | 107 | | return !string.IsNullOrEmpty(uri.Scheme) && !string.IsNullOrEmpty(uri.Host); |
| | | 108 | | } |
| | 1 | 109 | | return false; |
| | | 110 | | } |
| | | 111 | | } |
| | | 112 | | } |