75 lines
3.1 KiB
C#
75 lines
3.1 KiB
C#
using NTDLS.SqliteDapperWrapper;
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namespace ZelWiki.Repository
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{
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internal static class RepositoryHelper
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{
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/// <summary>
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/// Fills in a custom orderby on a given sql script.
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/// </summary>
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/// <param name="filename"></param>
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/// <param name="orderBy"></param>
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/// <returns></returns>
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public static string TransposeOrderby(string filename, string? orderBy, string? orderByDirection)
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{
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var script = ManagedDataStorageInstance.TranslateSqlScript(filename);
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if (string.IsNullOrEmpty(orderBy))
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{
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return script;
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}
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string beginParentTag = "--CUSTOM_ORDER_BEGIN::";
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string endParentTag = "--::CUSTOM_ORDER_BEGIN";
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string beginConfigTag = "--CONFIG::";
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string endConfigTag = "--::CONFIG";
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while (true)
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{
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int beginParentIndex = script.IndexOf(beginParentTag, StringComparison.OrdinalIgnoreCase);
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int endParentIndex = script.IndexOf(endParentTag, StringComparison.OrdinalIgnoreCase);
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if (beginParentIndex > 0 && endParentIndex > beginParentIndex)
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{
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var sectionText = script.Substring(beginParentIndex + beginParentTag.Length, (endParentIndex - beginParentIndex) - endParentTag.Length).Trim();
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int beginConfigIndex = sectionText.IndexOf(beginConfigTag, StringComparison.OrdinalIgnoreCase);
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int endConfigIndex = sectionText.IndexOf(endConfigTag, StringComparison.OrdinalIgnoreCase);
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if (beginConfigIndex >= 0 && endConfigIndex > beginConfigIndex)
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{
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var configText = sectionText.Substring(beginConfigIndex + beginConfigTag.Length, (endConfigIndex - beginConfigIndex) - endConfigTag.Length).Trim();
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var configs = configText.Split("\n").Select(o => o.Trim())
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.Where(o => o.Contains('='))
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.Select(o => (Name: o.Split("=")[0], Field: o.Split("=")[1]));
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var selectedConfig = configs.SingleOrDefault(o => string.Equals(o.Name, orderBy, StringComparison.OrdinalIgnoreCase));
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if (selectedConfig == default)
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{
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throw new Exception($"No order by mapping was found in '{filename}' for the field '{orderBy}'.");
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}
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script = script.Substring(0, beginParentIndex)
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+ $"ORDER BY\r\n\t{selectedConfig.Field} "
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+ (string.Equals(orderByDirection, "asc", StringComparison.InvariantCultureIgnoreCase) ? "asc" : "desc")
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+ script.Substring(endParentIndex + endParentTag.Length);
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}
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else
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{
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throw new Exception($"No order configuration was found in '{filename}'.");
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}
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}
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else
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{
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break;
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}
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}
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return script;
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}
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}
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}
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