122 lines
4.6 KiB
C#
122 lines
4.6 KiB
C#
using System.Collections.Generic;
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using System;
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using System.Globalization;
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using System.Text;
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using Newtonsoft.Json.Linq;
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using System.Linq;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.Extensions.Logging;
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namespace AyaNova.DataList
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{
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internal class SqlSelectBuilderResult
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{
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internal Dictionary<string, int> map { get; set; }
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internal string Select { get; set; }
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}
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internal static class DataListSqlSelectBuilder
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{
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//Build the SELECT portion of a list query based on the ListView fields
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internal static SqlSelectBuilderResult Build(List<AyaDataListFieldDefinition> objectFieldsList, List<string> listViewFieldList)
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{
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StringBuilder sb = new StringBuilder();
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sb.Append("SELECT ");
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//Default ID column for each row (always is aliased as df)
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AyaDataListFieldDefinition def = objectFieldsList.FirstOrDefault(x => x.FieldKey == "df");
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if (def == null)
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{
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throw new System.ArgumentNullException("DataListSqlSelectBuilder: objectFieldList is missing the df default field");
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}
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if (string.IsNullOrEmpty(def.SqlIdColumnName))
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{
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sb.Append("id");//default when no alternate column is specified
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}
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else
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{
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sb.Append(def.SqlIdColumnName);
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}
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sb.Append(" AS df");
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//keep track of which custom fields columns were added already
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//this ensures that if there is more than one set of custom fields like from two different objects in the list
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//only unique ones will be returned by query
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// Dictionary<string, int> CustomFieldColumnsAddedToQuery = new Dictionary<string, int>();
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//map sql column name to ordinal name
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Dictionary<string, int> map = new Dictionary<string, int>();
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map.Add("df", 0);
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int nOrdinal = 0;
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foreach (string ColumnName in listViewFieldList)
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{
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//skip the df column, it's already been processed above
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if (ColumnName == "df")
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continue;
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AyaDataListFieldDefinition o = objectFieldsList.FirstOrDefault(x => x.FieldKey == ColumnName);
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#if (DEBUG)
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//Developers little helper
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if (o == null)
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{
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throw new System.ArgumentNullException($"DEV ERROR in DataListSqlSelectBuilder.cs: field {ColumnName} specified in template was NOT found in ObjectFields list");
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}
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#endif
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if (o != null)
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{//Ignore missing fields in production
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if (o.IsCustomField)
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{ //if any are custom field then add custom fields column to query
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var CustomFieldSqlColumnName = o.GetSqlValueColumnName();
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//has it been added yet?
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if (!map.ContainsKey(CustomFieldSqlColumnName))
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{ //nope
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sb.Append(", ");
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sb.Append(CustomFieldSqlColumnName);
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map.Add(CustomFieldSqlColumnName, ++nOrdinal);
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}
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//if it was already added then can just ignore it
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// else
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// {
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// map.Add(ColumnName, CustomFieldColumnsAddedToQuery[CustomFieldSqlColumnName]);
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// }
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}
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else
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{
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var valueColumnName = o.GetSqlValueColumnName();
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if (!map.ContainsKey(valueColumnName))
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{
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sb.Append(", ");
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sb.Append(valueColumnName);
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map.Add(valueColumnName, ++nOrdinal);
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}
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//does it also have an ID column?
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var idColumnName = o.SqlIdColumnName;
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if (!string.IsNullOrWhiteSpace(idColumnName))
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{
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if (!map.ContainsKey(idColumnName))
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{
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sb.Append(", ");
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sb.Append(idColumnName);
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map.Add(idColumnName, ++nOrdinal);
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}
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}
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}
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}
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}
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return new SqlSelectBuilderResult() { map = map, Select = sb.ToString() };
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}
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}//eoc
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}//ens
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