public SearchItemsCommand(QueryResultEntitySelector resultEntitySelector, SearchResultViewModel searchResultViewModel) : base()
{
_canExecute = IsValidParameters;
_execute = QuerySearchCriteria;
this.resultEntitySelector = resultEntitySelector;
this.searchResultViewModel = searchResultViewModel;
}
// anything that needs initializing
public MasterDetailItemWindowViewModelBase(QueryResultEntitySelector resultEntitySelector, SearchFilterOptions SearchFilter) : base(resultEntitySelector, SearchFilter)
{
// from this point on, trigger changes based on any changes to our SearchFilter
PropertyChanged += MasterDetailItemWindowViewModelBase_PropertyChanged;
}
public MasterDetailItemWindowViewModelBase(QueryResultEntitySelector resultEntitySelector) : this(resultEntitySelector, null)
{
}
public SearchFilterOptionsViewModel(SearchFilterOptions searchFilterOptions, QueryResultEntitySelector resultEntitySelector, SearchResultViewModel searchResultViewModel) : base()
{
SearchFilterCommand = new SearchItemsCommand(resultEntitySelector, searchResultViewModel);
this.SearchFilter = searchFilterOptions;
}
private ObservableCollection <SearchResult> getChildItems(QueryResultEntitySelector resultEntitySelector, SearchFilterOptions searchFilter, SiteLocation site, EquipmentUnitType equip, SearchResult parent, IList <GenericItemResult> itemResults, ref GenericItemResult selectedItem)
{
try
{
// if called on an item (not module or bin) then just return immediately, assume nothing inside a non-container item
//if ((parentItem != null) && !(parentItem.isModule || parentItem.isBin)) return null;
var parentItem = parent as GenericItemResult; // will be null if not a item, item instance, or item type
var bins = new ObservableCollection <SearchResult>();
var ghBins = new BinGroupHeader()
{
description = "Bins", parent = parent, children = bins
};
var modules = new ObservableCollection <SearchResult>();
var ghModules = new ModuleGroupHeader()
{
description = "Modules", parent = parent, children = modules
};
var items = new ObservableCollection <SearchResult>();
var ghItems = new ItemGroupHeader()
{
description = "Items", parent = parent, children = items
};
foreach (var item in itemResults)
{
// must be child of current parent (null for top level items), and for current site and equipment unit
if ((item != parentItem) && ((item.parentId == parentItem?.id) || ((resultEntitySelector == QueryResultEntitySelector.ItemInstance) && (item?.parentId == parentItem?.parentItemId)) ||
((parentItem == null) && (Guid.Empty == item.parentId))) && ((site == null) || (item.siteLocationId == site.id)) && ((equip == null) || (item.unitTypeName.Equals(equip.name))))
{
// bins
if (item.isBin)
{
bins.Add(item);
item.parent = ghBins;
}
// modules
if (item.isModule)
{
modules.Add(item);
item.parent = ghModules;
}
// items
if (!(item.isModule || item.isBin))
{
items.Add(item);
item.parent = ghItems;
}
// iff a single item searched for, then select it
ItemNumberParser itemNumberParser = new ItemNumberParser(searchFilter.SearchText);
if (itemNumberParser.IsItemNumber())
{
// itemNumber is ItemType.itemTypeId || '-' || Item.itemId for item instances and items
if (string.Equals(item.itemNumber, itemNumberParser.itemTypeId + '-' + itemNumberParser.itemId, StringComparison.InvariantCultureIgnoreCase))
{
item.IsExpanded = true;
item.IsSelected = true;
selectedItem = item;
}
}
// find all children (and so on) for this item
if (item.isBin || item.isModule)
{
item.children = getChildItems(resultEntitySelector, searchFilter, site, equip, item, itemResults, ref selectedItem);
}
}
}
// create our child collection, always contains headers and possible list of bins, modules, and items.
var children = new ObservableCollection <SearchResult>(new List <GroupHeader>(3));
// bins are not contained within any other item, i.e. top level only; and there are bins
if (/*(parentItem == null) &&*/ (bins.Count > 0))
{
children.Add(ghBins);
}
// modules can be in bins or at the top level; and there are modules
if (/*((parentItem == null) || (parentItem.isBin)) &&*/ (modules.Count > 0))
{
children.Add(ghModules);
}
// items can be at any level, but only add if there items
if (items.Count > 0)
{
children.Add(ghItems);
}
return(children);
}
catch (Exception e)
{
logger.Error(e, $"Exception in getChildItems - {e.Message}");
logger.Error(e.StackTrace);
throw;
}
}
/// <summary>
/// returns tree of ItemInstance, Item, or ItemType to display
/// Only includes limited information for display, full entity must be loaded for all details/editing
/// </summary>
/// <param name="searchFilter">criteria to filter search results</param>
/// <param name="selectedItem">If not null, and search results in a single selected Item result, will be set to non null value</param>
/// <returns></returns>
public ObservableCollection <SearchResult> GetItemTree(QueryResultEntitySelector resultEntitySelector, SearchFilterOptions searchFilter, out GenericItemResult selectedItem)
{
// default to no specific singular item found
selectedItem = null;
try
{
// parameters to pass for query
var queryParamsList = new List <string>();
#region includeItemsModulesOrBins limits to just items, modules, bins or some combination
// limit to just items, modules, bins or some combination
string includeItemsModulesOrBins = " AND ";
switch (SearchFilterItemBoolsToEnum(searchFilter))
{
case ItemAndContainerEnum.All:
includeItemsModulesOrBins = ""; // don't add additional condition
break;
case ItemAndContainerEnum.Containers:
includeItemsModulesOrBins += "((isBin = 1) OR (isModule = 1))";
break;
case ItemAndContainerEnum.Items:
includeItemsModulesOrBins += "(((isBin IS NULL) OR (IsBin != 1)) AND ((isModule IS NULL) OR (isModule != 1)))";
break;
case ItemAndContainerEnum.Modules:
includeItemsModulesOrBins += "(isModule = 1)"; // assumes item can not be both a module and bin at same time
break;
case ItemAndContainerEnum.Bins:
includeItemsModulesOrBins += "(isBin = 1)"; // assumes item can not be both a module and bin at same time
break;
case ItemAndContainerEnum.Items | ItemAndContainerEnum.Modules:
includeItemsModulesOrBins += "((isBin IS NULL) OR (IsBin != 1))"; // basically not a bin
break;
case ItemAndContainerEnum.Items | ItemAndContainerEnum.Bins:
includeItemsModulesOrBins += "((isModule IS NULL) OR (isModule != 1))"; // basically not a module
break;
default:
// while silly, a person may request nothing
// throw new ArgumentOutOfRangeException("include", "DB.GetItemList invalid selection of what to return (items|modules|bins)!");
includeItemsModulesOrBins += "0"; // i.e. WHERE ??? AND 0 always returns no rows
break;
}
#endregion includeItemsModulesOrBins limits to just items, modules, bins or some combination
#region which db fields to return and their mapping to GenericItemResult
var Fields = string.Empty;
if (resultEntitySelector == QueryResultEntitySelector.ItemInstance)
{
Fields = "'ItemInstance' AS entityType, ItemInstance.id as id, statusId, Item.id as parentItemId, ";
}
else if (resultEntitySelector == QueryResultEntitySelector.Item)
{
Fields = "'Item' AS entityType, Item.id as id, ";
}
else
{
Fields = "'ItemType' AS entityType, ItemType.id as id, ItemType.itemTypeId as itemNumber, ";
}
if (resultEntitySelector != QueryResultEntitySelector.ItemType)
{
Fields += "ItemType.itemTypeId || '-' || Item.itemId AS itemNumber, count AS quantity, parentId, unitTypeName, ";
}
Fields += "ItemType.name AS description, isModule, isBin";
#endregion which db fields to return and their mapping to GenericItemResult
// define our basic (joined) tables for our result entity
const string TablesItemType = "ItemType";
const string TablesItem = "(Item INNER JOIN " + TablesItemType + " ON Item.ItemTypeId=ItemType.id)";
const string TablesItemInstance = "(ItemInstance INNER JOIN " + TablesItem + " ON ItemInstance.itemId=Item.id)";
// default to minimal tables (to avoid JOIN based filtering), but query filters determines actual resulting join
QueryResultEntitySelector requiredTables = resultEntitySelector;
string JoinedTables = "{0}";
string selectedSite = "(1)"; // so remaining conditions can just use "AND ..."
// only limit by site location if it is a viable option (Note: site location is an ItemInstance field)
if (searchFilter.SiteLocationEnabled)
{
Fields += ", siteLocationId";
JoinedTables = $"(SiteLocation INNER JOIN {JoinedTables} ON SiteLocation.id=ItemInstance.siteLocationId)";
requiredTables = QueryResultEntitySelector.ItemInstance;
selectedSite = "(SiteLocation.id =?)";
queryParamsList.Add(searchFilter.User.siteId.ToString());
}
// optionally do not exclude removedFromService items
string excludeOutOfServiceItems = string.Empty;
if (true /*!searchFilter.AllowItemsRemovedFromService*/)
{
if (resultEntitySelector == QueryResultEntitySelector.ItemInstance)
{
excludeOutOfServiceItems = "AND (ItemInstance.removedServiceDate IS NULL)";
}
}
// limit by equipment unit type e.g. DMSU only, MMRU and SSU, ...
// either empty "" or list of desired unit types with each type surrounded in single quotes and comma separated
// e.g. "'DMSU'" OR "'DMSU', 'SSU'"
string selectedUnits = string.Empty;
if (searchFilter.SelectEquipmentUnitsEnabled)
{
selectedUnits = getConditionFromList(searchFilter, searchFilter.SelectedEquipmentUnits, searchFilter.EquipmentUnits.Count, " AND (unitTypeName IN ({0}))");
// Note: we need INNER JOIN to exclude items when filtering, but if not filtering then any join
// will prevent ItemType not yet associated with an Item from being returned
if ((selectedUnits.Length > 0) && (requiredTables == QueryResultEntitySelector.ItemType))
{
requiredTables = QueryResultEntitySelector.Item;
}
}
#region selectedStatus limits by item instance status
// limit by item status
string selectedStatus = string.Empty;
if (searchFilter.SelectItemStatusValuesEnabled)
{
selectedStatus = getConditionFromList(searchFilter, searchFilter.SelectedItemStatusValues, searchFilter.ItemStatusValues.Count, " AND (ItemStatus.name IN ({0}))");
if (selectedStatus.Length > 0)
{
if (resultEntitySelector != QueryResultEntitySelector.ItemInstance)
{
requiredTables = QueryResultEntitySelector.ItemInstance;
}
//Fields += ", statusId"; // only available for ItemInstance queries to allow activating buttons on overview lists
JoinedTables = $"(ItemStatus INNER JOIN {JoinedTables} ON ItemStatus.id=ItemInstance.statusId)";
}
}
#endregion selectedStatus limits by item instance status
#region selectedCategories limits by item category
// limit by item category
string selectedCategories = "";
if (searchFilter.SelectItemCategoryValuesEnabled)
{
selectedCategories = getConditionFromList(searchFilter, searchFilter.SelectedItemCategoryValues, searchFilter.ItemCategoryValues.Count, " AND (ItemCategory.name IN ({0}))");
if (selectedCategories.Length > 0)
{
JoinedTables = $"(ItemCategory INNER JOIN {JoinedTables} ON ItemCategory.id=ItemType.itemCategoryId)";
}
}
#endregion selectedCategories limits by item category
string itemDesc = "";
if (!string.IsNullOrWhiteSpace(searchFilter.SearchText))
{
ItemNumberParser itemNumberParser = new ItemNumberParser(searchFilter.SearchText);
if (itemNumberParser.IsItemNumber())
{
// WARNING: these values are validated by regex to only contain digits and letters
// however to avoid SQL injection or other issues, passed as parameter
// site location, Note: overrides drop down selection if using OnlyExact
// limits to a specific item instance if used in conjunction with item id
if (searchFilter.SiteLocationEnabled && !string.IsNullOrEmpty(itemNumberParser.siteCode) && (searchFilter.ItemTypeMatching == SearchFilterItemMatching.OnlyExact))
{
itemDesc += "(SiteLocation.locSuffix=?)";
queryParamsList.Add(itemNumberParser.siteCode);
}
// equipment unit, Note: redundant as also part of item id; overrides drop down selection
if (searchFilter.SelectEquipmentUnitsEnabled && !string.IsNullOrEmpty(itemNumberParser.equipCode) && (searchFilter.ItemTypeMatching == SearchFilterItemMatching.OnlyExact))
{
if (itemDesc.Length > 0)
{
itemDesc += " AND ";
}
itemDesc += "(EquipmentUnitType.unitCode=?)";
queryParamsList.Add(itemNumberParser.equipCode);
}
// item type, search by id instead of partial description match
if (!string.IsNullOrEmpty(itemNumberParser.itemTypeId))
{
if (int.TryParse(itemNumberParser.itemTypeId, out int itemType))
{
if (itemDesc.Length > 0)
{
itemDesc += " AND ";
}
itemDesc += "(ItemType.itemTypeId=?)";
queryParamsList.Add(Convert.ToString(itemType));
}
else
{
logger.Error($"DB.GetItemTree - bad itemNumberParser.itemTypeId, Not an integer! [{itemNumberParser.itemTypeId}]");
}
}
// limit to specific item only makes sense for item and itemInstance, not itemType
if (resultEntitySelector != QueryResultEntitySelector.ItemType)
{
// item id, limits search to specific item if "onlyExact" (i.e. not "AnySame")
if (!string.IsNullOrEmpty(itemNumberParser.itemTypeId) && (searchFilter.ItemTypeMatching == SearchFilterItemMatching.OnlyExact))
{
if (int.TryParse(itemNumberParser.itemId, out int itemId))
{
if (itemDesc.Length > 0)
{
itemDesc += " AND ";
}
itemDesc += "(Item.itemId=?)";
queryParamsList.Add(Convert.ToString(itemId));
}
else
{
logger.Error($"DB.GetItemTree - bad itemNumberParser.itemId, Not an integer! [{itemNumberParser.itemId}]");
}
}
}
itemDesc = $" AND ({itemDesc})";
}
else
{
itemDesc = " AND (ItemType.name LIKE ?)";
queryParamsList.Add("%" + searchFilter.SearchText + "%"); // force wildcards so matches anywhere in name
}
}
// update JoinedTables based on what is required
JoinedTables = string.Format(JoinedTables,
(requiredTables == QueryResultEntitySelector.ItemInstance) ? TablesItemInstance :
(requiredTables == QueryResultEntitySelector.Item) ? TablesItem :
TablesItemType);
// Note: SQL aggregates (e.g. SUM()) always return at least 1 row [on NULL row] even if otherwise no rows,
// so to avoid extraneous row being returned, use aggregates in subquery
// Also note that using aggregate will limit rows returned to 1st of given type
// Note: {selectedSite} must be 1st so remaining conditions can use "AND ..." without seeing if prior condition
// get exact items, if they have them, their parents and grandparents
var ItemAndTypeQuery = $"FROM {JoinedTables} WHERE ";
var matchingItemsQuery =
$"{ItemAndTypeQuery} {selectedSite} {excludeOutOfServiceItems} {selectedUnits} {includeItemsModulesOrBins} {selectedStatus} {selectedCategories} ";
var matchingExactItemsQuery =
$"{matchingItemsQuery} {itemDesc} ";
var matchingItems =
$"SELECT DISTINCT {Fields} {matchingExactItemsQuery}";
var parentItemsOf =
$"{ItemAndTypeQuery} ((isBin = 1) OR (isModule = 1)) AND Item.id IN (SELECT parentId ";
var parentItemsQuery =
$"{parentItemsOf} {matchingExactItemsQuery}) ";
var parentItems =
$"SELECT DISTINCT {Fields} {parentItemsQuery}";
var parentOfParentItems =
$"SELECT DISTINCT {Fields} {parentItemsOf} {parentItemsQuery})";
// if item queried is not a bin or module, then need sibling items
var siblingItemsQuery =
$"{ItemAndTypeQuery} ((isBin <> 1) AND (isModule <> 1)) AND Item.parentId IN (SELECT Item.id {parentItemsQuery}) ";
var siblingItems =
$"SELECT DISTINCT {Fields} {siblingItemsQuery}";
// if item queried is a bin or module, then need its children
var childItemsQuery =
$"{ItemAndTypeQuery} Item.parentId IN (SELECT Item.id {matchingExactItemsQuery})";
var childItems =
$"SELECT DISTINCT {Fields} {childItemsQuery}";
// add grandchildren
var grandchildItems =
$"SELECT DISTINCT {Fields} " +
$"{ItemAndTypeQuery} Item.parentId IN (SELECT Item.id {childItemsQuery})";
string SQL;
if (string.IsNullOrEmpty(itemDesc) || (resultEntitySelector == QueryResultEntitySelector.ItemType))
{
// not searching by any particular item so no need for UNION portions to find parents or kids of query'd items
SQL = $"{matchingItems} ORDER BY ItemType.name;";
}
else
{
// each union query takes same parameters, so put into array so can ensure parameter count always matches union count
string[] unionQueries = { $"{matchingItems}", $"{parentItems}", $"{parentOfParentItems}", $"{siblingItems}", $"{childItems}", $"{grandchildItems}" };
StringBuilder sqlBuilder = new StringBuilder();
foreach (var s in unionQueries)
{
if (sqlBuilder.Length > 0)
{
sqlBuilder.Append(" UNION ");
}
sqlBuilder.Append(s);
}
sqlBuilder.Append(" ORDER BY ItemType.name;");
SQL = sqlBuilder.ToString();
// we need to repeat queryParams for each union group
var UnionGroupCount = unionQueries.Length;
var tempList = new List <string>(queryParamsList.Count * UnionGroupCount);
for (int i = 1; i <= UnionGroupCount; i++)
{
foreach (var qParam in queryParamsList)
{
tempList.Add(qParam);
}
}
queryParamsList = tempList;
}
logger.Debug(SQL);
logger.Debug(statePrinter.PrintObject(queryParamsList));
var queryItems = db.QueryAsync <GenericItemResult>(SQL, queryParamsList.ToArray()).Result;
ObservableCollection <SearchResult> results;
if (resultEntitySelector == QueryResultEntitySelector.ItemType)
{
// get a count of distinct Items of type ItemType,
// i.e. if there are items Y and Z of type T in unit A and item X of type T in unit B
// then we would return 3 if units A & B selected, or 2 if only unit A is selected.
// Note: this is not a count of how many (sum of counts) there are, i.e. if item Y
// has a count 5 (e.g. 5 gloves) and only a count of 1 for X and Z then there
// 7 total Items (5 + 1 + 1 = 7 gloves) for units A and B, but only 3 Items (X, Y, & Z)
var query = $"SELECT COUNT(Item.id) FROM Item INNER JOIN ItemType ON Item.ItemTypeId=ItemType.id WHERE ItemType.itemTypeId=? {selectedUnits};";
foreach (var itemResult in queryItems)
{
itemResult.quantity = db.ExecuteScalar <int>(query, itemResult.itemNumber);
}
// if returning item types then do not include any headers, no nesting either
results = new ObservableCollection <SearchResult>(queryItems);
// auto select if only 1 ItemType returned
if (results.Count == 1)
{
selectedItem = results.FirstOrDefault() as GenericItemResult;
}
}
else
{
// if equipment list not shown (or null) then assume returning results for all available units
var equipList = ((searchFilter.SelectEquipmentUnitsEnabled) ? searchFilter.SelectedEquipmentUnits : searchFilter.EquipmentUnits) ?? searchFilter.EquipmentUnits;
if (equipList == null)
{
results = getChildItems(resultEntitySelector, searchFilter, null, null, null, queryItems, ref selectedItem);
}
else
{
var equips = new ObservableCollection <SearchResult>(new List <SearchResult>(equipList.Count));
SearchResult siteResult = null;
SiteLocation site = null;
if (searchFilter.SiteLocationEnabled)
{
site = searchFilter.User.availableSites.Where(x => x.id == searchFilter.User.siteId).FirstOrDefault();
siteResult = new GroupHeader()
{
id = site.id, description = site.name, children = equips
};
results = new ObservableCollection <SearchResult> {
siteResult
};
}
else
{
results = equips;
}
foreach (var equipObj in equipList)
{
if (equipObj is EquipmentUnitType equip)
{
var equipResult = new EquipmentUnitResult()
{
name = equip.name, description = equip.description, parent = siteResult
};
equipResult.children = getChildItems(resultEntitySelector, searchFilter, site, equip, equipResult, queryItems, ref selectedItem);
// add equipment to results, pk is equip.name not a Guid
// don't include if nothing for that equipment ???
if (equipResult.childCount > 0)
{
equips.Add(equipResult);
}
}
}
}
}
return(results);
}
catch (Exception e)
{
logger.Error(e, $"Error retrieving Item Tree! - {e.Message}");
// return an empty list
return(new ObservableCollection <SearchResult>());
}
}