@orbit/record-cache
Version:
Orbit base classes used to access and maintain a set of records.
109 lines • 15.9 kB
JavaScript
var _a, _b;
import { Orbit } from '@orbit/core';
import { equalRecordIdentities } from '@orbit/records';
import { recordOperationChange } from './record-change';
const { assert } = Orbit;
export class LiveQuery {
constructor(settings) {
assert('Only single expression queries are supported on LiveQuery', !Array.isArray(settings.query.expressions));
this.debounce = settings.debounce;
this._query = settings.query;
}
_subscribe(onNext) {
const execute = this.debounce ? onceTick(onNext) : onNext;
const unsubscribePatch = this.cache.on('patch', (operation) => {
if (this.operationRelevantForQuery(operation)) {
execute();
}
});
const unsubscribeReset = this.cache.on('reset', () => {
execute();
});
function unsubscribe() {
cancelTick(execute);
unsubscribePatch();
unsubscribeReset();
}
return unsubscribe;
}
operationRelevantForQuery(operation) {
const change = recordOperationChange(operation);
const expression = this._query.expressions;
return this.queryExpressionRelevantForChange(expression, change);
}
queryExpressionRelevantForChange(expression, change) {
switch (expression.op) {
case 'findRecord':
return this.findRecordQueryExpressionRelevantForChange(expression, change);
case 'findRecords':
return this.findRecordsQueryExpressionRelevantForChange(expression, change);
case 'findRelatedRecord':
return this.findRelatedRecordQueryExpressionRelevantForChange(expression, change);
case 'findRelatedRecords':
return this.findRelatedRecordsQueryExpressionRelevantForChange(expression, change);
default:
return true;
}
}
findRecordQueryExpressionRelevantForChange(expression, change) {
return equalRecordIdentities(expression.record, change);
}
findRecordsQueryExpressionRelevantForChange(expression, change) {
if (expression.type) {
return expression.type === change.type;
}
else if (expression.records) {
for (let record of expression.records) {
if (record.type === change.type) {
return true;
}
}
return false;
}
return true;
}
findRelatedRecordQueryExpressionRelevantForChange(expression, change) {
return (equalRecordIdentities(expression.record, change) &&
(change.relationships.includes(expression.relationship) || change.remove));
}
findRelatedRecordsQueryExpressionRelevantForChange(expression, change) {
const relationshipDef = this.schema.getRelationship(expression.record.type, expression.relationship);
const type = relationshipDef === null || relationshipDef === void 0 ? void 0 : relationshipDef.type;
if (Array.isArray(type) && type.find((type) => type === change.type)) {
return true;
}
else if (type === change.type) {
return true;
}
return (equalRecordIdentities(expression.record, change) &&
(change.relationships.includes(expression.relationship) || change.remove));
}
}
const isNode = typeof ((_a = Orbit.globals.process) === null || _a === void 0 ? void 0 : _a.nextTick) === 'function';
let resolvedPromise;
const nextTick = isNode
? function (fn) {
if (!resolvedPromise) {
resolvedPromise = Promise.resolve();
}
resolvedPromise.then(() => {
Orbit.globals.process.nextTick(fn);
});
}
: (_b = Orbit.globals.setImmediate) !== null && _b !== void 0 ? _b : setTimeout;
function onceTick(fn) {
return function tick() {
if (!ticks.has(tick)) {
ticks.add(tick);
nextTick(() => {
fn();
cancelTick(tick);
});
}
};
}
function cancelTick(tick) {
ticks.delete(tick);
}
const ticks = new WeakSet();
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onceTick(onNext) : onNext;\n\n    const unsubscribePatch = this.cache.on(\n      'patch',\n      (operation: RecordOperation) => {\n        if (this.operationRelevantForQuery(operation)) {\n          execute();\n        }\n      }\n    );\n\n    const unsubscribeReset = this.cache.on('reset', () => {\n      execute();\n    });\n\n    function unsubscribe() {\n      cancelTick(execute);\n      unsubscribePatch();\n      unsubscribeReset();\n    }\n\n    return unsubscribe;\n  }\n\n  constructor(settings: LiveQuerySettings) {\n    assert(\n      'Only single expression queries are supported on LiveQuery',\n      !Array.isArray(settings.query.expressions)\n    );\n    this.debounce = settings.debounce;\n    this._query = settings.query;\n  }\n\n  operationRelevantForQuery(operation: RecordOperation): boolean {\n    const change = recordOperationChange(operation);\n    const expression = this._query.expressions as RecordQueryExpression;\n    return this.queryExpressionRelevantForChange(expression, change);\n  }\n\n  protected queryExpressionRelevantForChange(\n    expression: RecordQueryExpression,\n    change: RecordChange\n  ): boolean {\n    switch (expression.op) {\n      case 'findRecord':\n        return this.findRecordQueryExpressionRelevantForChange(\n          expression as FindRecord,\n          change\n        );\n      case 'findRecords':\n        return this.findRecordsQueryExpressionRelevantForChange(\n          expression as FindRecords,\n          change\n        );\n      case 'findRelatedRecord':\n        return this.findRelatedRecordQueryExpressionRelevantForChange(\n          expression as FindRelatedRecord,\n          change\n        );\n      case 'findRelatedRecords':\n        return this.findRelatedRecordsQueryExpressionRelevantForChange(\n          expression as FindRelatedRecords,\n          change\n        );\n      default:\n        return true;\n    }\n  }\n\n  protected findRecordQueryExpressionRelevantForChange(\n    expression: FindRecord,\n    change: RecordChange\n  ): boolean {\n    return equalRecordIdentities(expression.record, change);\n  }\n\n  protected findRecordsQueryExpressionRelevantForChange(\n    expression: FindRecords,\n    change: RecordChange\n  ): boolean {\n    if (expression.type) {\n      return expression.type === change.type;\n    } else if (expression.records) {\n      for (let record of expression.records) {\n        if (record.type === change.type) {\n          return true;\n        }\n      }\n      return false;\n    }\n    return true;\n  }\n\n  protected findRelatedRecordQueryExpressionRelevantForChange(\n    expression: FindRelatedRecord,\n    change: RecordChange\n  ): boolean {\n    return (\n      equalRecordIdentities(expression.record, change) &&\n      (change.relationships.includes(expression.relationship) || change.remove)\n    );\n  }\n\n  protected findRelatedRecordsQueryExpressionRelevantForChange(\n    expression: FindRelatedRecords,\n    change: RecordChange\n  ): boolean {\n    const relationshipDef = this.schema.getRelationship(\n      expression.record.type,\n      expression.relationship\n    );\n    const type = relationshipDef?.type;\n\n    if (Array.isArray(type) && type.find((type) => type === change.type)) {\n      return true;\n    } else if (type === change.type) {\n      return true;\n    }\n\n    return (\n      equalRecordIdentities(expression.record, change) &&\n      (change.relationships.includes(expression.relationship) || change.remove)\n    );\n  }\n}\n\nconst isNode = typeof Orbit.globals.process?.nextTick === 'function';\nlet resolvedPromise: Promise<void>;\nconst nextTick = isNode\n  ? function (fn: () => void) {\n      if (!resolvedPromise) {\n        resolvedPromise = Promise.resolve();\n      }\n      resolvedPromise.then(() => {\n        Orbit.globals.process.nextTick(fn);\n      });\n    }\n  : Orbit.globals.setImmediate ?? setTimeout;\n\nfunction onceTick(fn: () => void) {\n  return function tick() {\n    if (!ticks.has(tick)) {\n      ticks.add(tick);\n      nextTick(() => {\n        fn();\n        cancelTick(tick);\n      });\n    }\n  };\n}\n\nfunction cancelTick(tick: () => void) {\n  ticks.delete(tick);\n}\n\nconst ticks = new WeakSet();\n"]}