breeze-client
Version:
Breeze data management for JavaScript clients
269 lines • 36.5 kB
JavaScript
//#region Copyright, Version, and Description
/*
* Copyright 2015-2021 IdeaBlade, Inc. All Rights Reserved.
* Use, reproduction, distribution, and modification of this code is subject to the terms and
* conditions of the IdeaBlade Breeze license, available at http://www.breezejs.com/license
*
* Author: Ward Bell
* Version: 0.9.5 - Steve Schmitt - convert to TypeScript, migrate to breeze-client repo, add HasEntityGraph and mixinEntityGraph
* Version: 0.9.4 - Marcel Good - fix UMD module name
* --------------------------------------------------------------------------------
* Adds getEntityGraph method to Breeze EntityManager prototype.
* Call mixinEntityGraph(EntityManager) to apply the mixin in a tree-shaking-resistant way.
* Then (manager as any).getEntityGraph(entity, "child");
*
* Depends on Breeze which it patches
*
* For discussion, see:
* http://www.breezejs.com/documentation/getentitygraph
*
* For example usage, see:
* https://github.com/Breeze/breeze.js.samples/tree/master/net/DocCode/DocCode/tests/getEntityGraphTests.js
*/
//#endregion
import { EntityManager, EntityQuery, EntityState, ExpandClause } from 'breeze-client';
export function mixinEntityGraph(emclass) {
const proto = EntityManager.prototype;
if (!proto.getEntityGraph) {
proto.getEntityGraph = getEntityGraph;
}
}
mixinEntityGraph(EntityManager);
function getEntityGraph(roots, expand) {
if (roots instanceof EntityQuery) {
let newRoots = this.executeQueryLocally(roots);
return getEntityGraphCore(newRoots, expand || roots.expandClause);
}
else {
return getEntityGraphCore(roots, expand);
}
}
function getEntityGraphCore(root, expand) {
let entityGroupMap;
let graph = [];
let rootType;
let roots = Array.isArray(root) ? root : [root];
addToGraph(roots); // removes dups & nulls
roots = graph.slice(); // copy of de-duped roots
if (roots.length) {
getRootInfo();
getExpand();
buildGraph();
}
return graph;
function addToGraph(entities) {
entities.forEach(function (entity) {
if (entity && graph.indexOf(entity) < 0) {
graph.push(entity);
}
});
}
function getRootInfo() {
let compatTypes;
roots.forEach(function (root, ix) {
let aspect;
if (!root || !(aspect = root.entityAspect)) {
throw getRootErr(ix, 'is not an entity');
}
if (aspect.entityState === EntityState.Detached) {
throw getRootErr(ix, 'is a detached entity');
}
let em = aspect.entityManager;
if (entityGroupMap) {
if (entityGroupMap !== em._entityGroupMap) {
throw getRootErr(ix, "has a different 'EntityManager' than other roots");
}
}
else {
entityGroupMap = em._entityGroupMap;
}
getRootType(root, ix);
});
function getRootErr(ix, msg) {
return new Error("'getEntityGraph' root[" + ix + "] " + msg);
}
function getRootType(root, ix) {
let thisType = root.entityType;
if (!rootType) {
rootType = thisType;
return;
}
else if (rootType === thisType) {
return;
}
// Types differs. Look for closest common base type
// does thisType derive from current rootType?
let baseType = rootType;
do {
compatTypes = compatTypes || baseType.getSelfAndSubtypes();
if (compatTypes.indexOf(thisType) > -1) {
rootType = baseType;
return;
}
baseType = baseType.baseEntityType;
compatTypes = null;
} while (baseType);
// does current rootType derives from thisType?
baseType = thisType;
do {
compatTypes = baseType.getSelfAndSubtypes();
if (compatTypes.indexOf(rootType) > -1) {
rootType = baseType;
return;
}
baseType = baseType.baseEntityType;
} while (baseType);
throw getRootErr(ix, "is not EntityType-compatible with other roots");
}
}
function getExpand() {
try {
if (!expand) {
expand = [];
}
else if (typeof expand === 'string') {
// tricky because Breeze expandClause not exposed publically
expand = new EntityQuery().expand(expand).expandClause;
}
if (expand instanceof ExpandClause && expand.propertyPaths) { // expand clause
expand = expand.propertyPaths;
}
else if (Array.isArray(expand)) {
if (!expand.every(function (elem) { return typeof elem === 'string'; })) {
throw '';
}
}
else {
throw '';
}
}
catch (_) {
throw new Error("expand must be an expand string, array of string paths, or a query expand clause");
}
}
function buildGraph() {
if (expand && expand instanceof Array && expand.length) {
let fns = expand.map(makePathFn);
fns.forEach(function (fn) { fn(roots); });
}
}
// Make function to get entities along a single expand path
// such as 'Orders.OrderDetails.Product'
function makePathFn(path) {
let fns = [], segments = path.split('.'), type = rootType;
for (let i = 0, slen = segments.length; i < slen; i++) {
let f = makePathSegmentFn(type, segments[i]);
type = f.navType;
fns.push(f);
}
return function pathFn(entities) {
for (let j = 0, flen = fns.length; j < flen; j++) {
let elen = entities.length;
if (elen === 0) {
return;
} // nothing left to explore
// fn to get related entities for this path segment
let fn = fns[j];
// get entities related by this path segment
let related = [];
for (let k = 0; k < elen; k++) {
related = related.concat(fn(entities[k]));
}
addToGraph(related);
if (j >= flen - 1) {
return;
} // no more path segments
// reset entities to deduped related entities
entities = [];
for (let l = 0, rlen = related.length; l < rlen; l++) {
let r = related[l];
if (entities.indexOf(r) < 0) {
entities.push(r);
}
}
}
};
}
// Make function to get entities along a single expand path segment
// such as the 'OrderDetails' in the 'Orders.OrderDetails.Product' path
function makePathSegmentFn(baseType, segment) {
let baseTypeName, fn = undefined, navType;
try {
baseTypeName = baseType.name;
let nav = baseType.getNavigationProperty(segment);
let fkName = nav.foreignKeyNames[0];
if (!nav) {
throw new Error(segment + " is not a navigation property of " + baseTypeName);
}
navType = nav.entityType;
// add derived types
let navTypes = navType.getSelfAndSubtypes();
let grps = []; // non-empty groups for these types
navTypes.forEach(function (t) {
let grp = entityGroupMap[t.name];
if (grp && grp._entities.length > 0) {
grps.push(grp);
}
});
let grpCount = grps.length;
if (grpCount === 0) {
// no related entities in cache
fn = function () { return []; };
}
else if (fkName) {
fn = function (entity) {
let val = null;
try {
let keyValue = entity.getProperty(fkName);
for (let i = 0; i < grpCount; i += 1) {
val = grps[i]._entities[grps[i]._indexMap[keyValue]];
if (val) {
break;
}
}
}
catch (e) {
rethrow(e);
}
return val;
};
}
else {
fkName = nav.inverse ?
nav.inverse.foreignKeyNames[0] :
nav.invForeignKeyNames[0];
if (!fkName) {
throw new Error("No inverse keys");
}
fn = function (entity) {
let vals = [];
try {
let keyValue = entity.entityAspect.getKey().values[0];
grps.forEach(function (grp) {
vals = vals.concat(grp._entities.filter(function (en) {
return en && en.getProperty(fkName) === keyValue;
}));
});
}
catch (e) {
rethrow(e);
}
return vals;
};
}
fn.navType = navType;
fn.path = segment;
}
catch (err) {
rethrow(err);
}
return fn;
function rethrow(e) {
let typeName = baseTypeName || baseType;
let error = new Error("'getEntityGraph' can't expand '" + segment + "' for " + typeName);
error.innerError = e;
throw error;
}
}
}
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Copyright, Version, and Description\r\n/*\r\n * Copyright 2015-2021 IdeaBlade, Inc.  All Rights Reserved.\r\n * Use, reproduction, distribution, and modification of this code is subject to the terms and\r\n * conditions of the IdeaBlade Breeze license, available at http://www.breezejs.com/license\r\n *\r\n * Author: Ward Bell\r\n * Version: 0.9.5 - Steve Schmitt - convert to TypeScript, migrate to breeze-client repo, add HasEntityGraph and mixinEntityGraph\r\n * Version: 0.9.4 - Marcel Good - fix UMD module name\r\n * --------------------------------------------------------------------------------\r\n * Adds getEntityGraph method to Breeze EntityManager prototype.\r\n * Call   mixinEntityGraph(EntityManager)   to apply the mixin in a tree-shaking-resistant way.\r\n * Then   (manager as any).getEntityGraph(entity, \"child\");\r\n *\r\n * Depends on Breeze which it patches\r\n *\r\n * For discussion, see:\r\n * http://www.breezejs.com/documentation/getentitygraph\r\n *\r\n * For example usage, see:\r\n * https://github.com/Breeze/breeze.js.samples/tree/master/net/DocCode/DocCode/tests/getEntityGraphTests.js\r\n */\r\n//#endregion\r\nimport { Entity, EntityManager, EntityQuery, EntityState, EntityType, ExpandClause } from 'breeze-client';\r\n\r\ninterface EntityGroup {\r\n  _entities: (Entity | null)[];\r\n  _indexMap: { [index: string]: number };\r\n}\r\n\r\n// module augmentation failed to build with ng-packagr, so we have a separate interface\r\nexport interface HasEntityGraph extends EntityManager {\r\n  /**\r\n  Get related entities of root entity (or root entities) as specified by expand.\r\n  @example\r\n      var graph = breeze.EntityManager.getEntityGraph(customer, 'Orders.OrderDetails');\r\n      // graph will be the customer, all of its orders and their details even if deleted.\r\n  @method getEntityGraph\r\n  @param roots {Entity|Array of Entity} The root entity or root entities.\r\n  @param expand {String|Array of String|Object} an expand string, a query expand clause, or array of string paths\r\n  @return {Array of Entity} root entities and their related entities, including deleted entities. Duplicates are removed and entity order is indeterminate.\r\n  **/\r\n  getEntityGraph(roots: Entity | Array<Entity>, expand: string | Array<string> | ExpandClause): Array<Entity>;\r\n\r\n  /**\r\n  Execute query locally and return both the query results and their related entities as specified by the optional expand parameter or the query's expand clause.\r\n  @example\r\n      var query = breeze.EntityQuery.from('Customers')\r\n                  .where('CompanyName', 'startsWith', 'Alfred')\r\n                  .expand('Orders.OrderDetails');\r\n      var graph = manager.getEntityGraph(query);\r\n      // graph will be the 'Alfred' customers, their orders and their details even if deleted.\r\n  @method getEntityGraph\r\n  @param query {EntityQuery} A query to be executed against the manager's local cache.\r\n  @param [expand] {String|Array of String|Object} an expand string, a query expand clause, or array of string paths\r\n  @return {Array of Entity} local queried root entities and their related entities, including deleted entities. Duplicates are removed and entity order is indeterminate.\r\n  **/\r\n  getEntityGraph(query: EntityQuery, expand: string | Array<string> | ExpandClause): Array<Entity>;\r\n\r\n}\r\n\r\nexport function mixinEntityGraph(emclass: { new(): EntityManager }) {\r\n  const proto = EntityManager.prototype;\r\n\r\n  if (!(proto as any).getEntityGraph) {\r\n    (proto as any).getEntityGraph = getEntityGraph;\r\n  }\r\n}\r\n\r\nmixinEntityGraph(EntityManager);\r\n\r\n\r\nfunction getEntityGraph(roots: Entity | Array<Entity> | EntityQuery, expand: string | Array<string> | ExpandClause) {\r\n  if (roots instanceof EntityQuery) {\r\n    let newRoots = this.executeQueryLocally(roots);\r\n    return getEntityGraphCore(newRoots, expand || roots.expandClause);\r\n  } else {\r\n    return getEntityGraphCore(roots, expand);\r\n  }\r\n}\r\n\r\nfunction getEntityGraphCore(root: Entity | Array<Entity>, expand: string | Array<string> | ExpandClause) {\r\n  let entityGroupMap: { [index: string]: EntityGroup };\r\n  let graph = [] as Array<Entity>;\r\n  let rootType: EntityType;\r\n  let roots = Array.isArray(root) ? root : [root];\r\n  addToGraph(roots);     // removes dups & nulls\r\n  roots = graph.slice(); // copy of de-duped roots\r\n  if (roots.length) {\r\n    getRootInfo();\r\n    getExpand();\r\n    buildGraph();\r\n  }\r\n  return graph;\r\n\r\n  function addToGraph(entities: Array<Entity>) {\r\n    entities.forEach(function (entity) {\r\n      if (entity && graph.indexOf(entity) < 0) {\r\n        graph.push(entity);\r\n      }\r\n    });\r\n  }\r\n\r\n  function getRootInfo() {\r\n    let compatTypes: Array<EntityType>;\r\n\r\n    roots.forEach(function (root, ix) {\r\n      let aspect;\r\n      if (!root || !(aspect = root.entityAspect)) {\r\n        throw getRootErr(ix, 'is not an entity');\r\n      }\r\n      if (aspect.entityState === EntityState.Detached) {\r\n        throw getRootErr(ix, 'is a detached entity');\r\n      }\r\n\r\n      let em = aspect.entityManager;\r\n      if (entityGroupMap) {\r\n        if (entityGroupMap !== em._entityGroupMap) {\r\n          throw getRootErr(ix, \"has a different 'EntityManager' than other roots\");\r\n        }\r\n      } else {\r\n        entityGroupMap = em._entityGroupMap;\r\n      }\r\n      getRootType(root, ix);\r\n\r\n    });\r\n\r\n    function getRootErr(ix: number, msg: string) {\r\n      return new Error(\"'getEntityGraph' root[\" + ix + \"] \" + msg);\r\n    }\r\n\r\n    function getRootType(root: Entity, ix: number) {\r\n      let thisType = root.entityType;\r\n      if (!rootType) {\r\n        rootType = thisType;\r\n        return;\r\n      } else if (rootType === thisType) {\r\n        return;\r\n      }\r\n      // Types differs. Look for closest common base type\r\n      // does thisType derive from current rootType?\r\n      let baseType = rootType;\r\n      do {\r\n        compatTypes = compatTypes || baseType.getSelfAndSubtypes();\r\n        if (compatTypes.indexOf(thisType) > -1) {\r\n          rootType = baseType;\r\n          return;\r\n        }\r\n        baseType = baseType.baseEntityType;\r\n        compatTypes = null;\r\n      } while (baseType);\r\n\r\n      // does current rootType derives from thisType?\r\n      baseType = thisType;\r\n      do {\r\n        compatTypes = baseType.getSelfAndSubtypes();\r\n        if (compatTypes.indexOf(rootType) > -1) {\r\n          rootType = baseType;\r\n          return;\r\n        }\r\n        baseType = baseType.baseEntityType;\r\n      } while (baseType);\r\n\r\n      throw getRootErr(ix, \"is not EntityType-compatible with other roots\");\r\n    }\r\n  }\r\n\r\n  function getExpand() {\r\n    try {\r\n      if (!expand) {\r\n        expand = [];\r\n      } else if (typeof expand === 'string') {\r\n        // tricky because Breeze expandClause not exposed publically\r\n        expand = new EntityQuery().expand(expand).expandClause;\r\n      }\r\n      if (expand instanceof ExpandClause && expand.propertyPaths) { // expand clause\r\n        expand = expand.propertyPaths;\r\n      } else if (Array.isArray(expand)) {\r\n        if (!expand.every(function (elem) { return typeof elem === 'string'; })) {\r\n          throw '';\r\n        }\r\n      } else {\r\n        throw '';\r\n      }\r\n    } catch (_) {\r\n      throw new Error(\r\n        \"expand must be an expand string, array of string paths, or a query expand clause\");\r\n    }\r\n  }\r\n\r\n  function buildGraph() {\r\n    if (expand && expand instanceof Array && expand.length) {\r\n      let fns = expand.map(makePathFn);\r\n      fns.forEach(function (fn) { fn(roots); });\r\n    }\r\n  }\r\n\r\n  // Make function to get entities along a single expand path\r\n  // such as 'Orders.OrderDetails.Product'\r\n  function makePathFn(path: string) {\r\n    let fns = [] as Array<Function>,\r\n      segments = path.split('.'),\r\n      type = rootType;\r\n\r\n    for (let i = 0, slen = segments.length; i < slen; i++) {\r\n      let f = makePathSegmentFn(type, segments[i]);\r\n      type = (f as any).navType;\r\n      fns.push(f);\r\n    }\r\n\r\n    return function pathFn(entities: Array<Entity>) {\r\n      for (let j = 0, flen = fns.length; j < flen; j++) {\r\n        let elen = entities.length;\r\n        if (elen === 0) { return; } // nothing left to explore\r\n        // fn to get related entities for this path segment\r\n        let fn = fns[j];\r\n        // get entities related by this path segment\r\n        let related = [] as Array<Entity>;\r\n        for (let k = 0; k < elen; k++) {\r\n          related = related.concat(fn(entities[k]));\r\n        }\r\n        addToGraph(related);\r\n        if (j >= flen - 1) { return; } // no more path segments\r\n\r\n        // reset entities to deduped related entities\r\n        entities = [];\r\n        for (let l = 0, rlen = related.length; l < rlen; l++) {\r\n          let r = related[l];\r\n          if (entities.indexOf(r) < 0) { entities.push(r); }\r\n        }\r\n      }\r\n    };\r\n  }\r\n\r\n  // Make function to get entities along a single expand path segment\r\n  // such as the 'OrderDetails' in the 'Orders.OrderDetails.Product' path\r\n  function makePathSegmentFn(baseType: EntityType, segment: string) {\r\n    let baseTypeName: string, fn = undefined, navType;\r\n    try {\r\n      baseTypeName = baseType.name;\r\n      let nav = baseType.getNavigationProperty(segment);\r\n      let fkName = nav.foreignKeyNames[0];\r\n      if (!nav) {\r\n        throw new Error(segment + \" is not a navigation property of \" + baseTypeName);\r\n      }\r\n      navType = nav.entityType;\r\n      // add derived types\r\n      let navTypes = navType.getSelfAndSubtypes();\r\n      let grps = [] as Array<EntityGroup>; // non-empty groups for these types\r\n      navTypes.forEach(function (t) {\r\n        let grp = entityGroupMap[t.name];\r\n        if (grp && grp._entities.length > 0) {\r\n          grps.push(grp);\r\n        }\r\n      });\r\n      let grpCount = grps.length;\r\n      if (grpCount === 0) {\r\n        // no related entities in cache\r\n        fn = function () { return [] as Array<Entity>; };\r\n      } else if (fkName) {\r\n        fn = function (entity: Entity) {\r\n          let val = null;\r\n          try {\r\n            let keyValue = entity.getProperty(fkName);\r\n            for (let i = 0; i < grpCount; i += 1) {\r\n              val = grps[i]._entities[grps[i]._indexMap[keyValue]];\r\n              if (val) { break; }\r\n            }\r\n          } catch (e) { rethrow(e); }\r\n          return val;\r\n        };\r\n      } else {\r\n        fkName = nav.inverse ?\r\n          nav.inverse.foreignKeyNames[0] :\r\n          nav.invForeignKeyNames[0];\r\n        if (!fkName) { throw new Error(\"No inverse keys\"); }\r\n        fn = function (entity: Entity) {\r\n          let vals = [] as Array<Entity>;\r\n          try {\r\n            let keyValue = entity.entityAspect.getKey().values[0];\r\n            grps.forEach(function (grp) {\r\n              vals = vals.concat(grp._entities.filter(function (en) {\r\n                return en && en.getProperty(fkName) === keyValue;\r\n              }));\r\n            });\r\n          } catch (e) { rethrow(e); }\r\n          return vals;\r\n        };\r\n      }\r\n      (fn as any).navType = navType;\r\n      (fn as any).path = segment;\r\n\r\n    } catch (err) { rethrow(err); }\r\n    return fn;\r\n\r\n    function rethrow(e: Error) {\r\n      let typeName = baseTypeName || baseType;\r\n      let error = new Error(\"'getEntityGraph' can't expand '\" + segment + \"' for \" + typeName);\r\n      (error as any).innerError = e;\r\n      throw error;\r\n    }\r\n  }\r\n}\r\n\r\n\r\n"]}