@forestadmin/datasource-toolkit
Version:
92 lines • 9.54 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const branch_1 = __importDefault(require("./nodes/branch"));
const leaf_1 = __importDefault(require("./nodes/leaf"));
const record_1 = __importDefault(require("../../../utils/record"));
const schema_1 = __importDefault(require("../../../utils/schema"));
class ConditionTreeFactory {
static matchRecords(schema, records) {
const ids = records.map(r => record_1.default.getPrimaryKey(schema, r));
return ConditionTreeFactory.matchIds(schema, ids);
}
static matchIds(schema, ids) {
const primaryKeyNames = schema_1.default.getPrimaryKeys(schema);
if (primaryKeyNames.length === 0) {
throw new Error('Collection must have at least one primary key');
}
for (const name of primaryKeyNames) {
const operators = schema_1.default.getColumn(schema, name).filterOperators;
if (!operators?.has('Equal') || !operators?.has('In')) {
throw new Error(`Field '${name}' must support operators: ['Equal', 'In']`);
}
}
return ConditionTreeFactory.matchFields(primaryKeyNames, ids);
}
static union(...trees) {
if (trees.length === 1)
return trees[0];
return ConditionTreeFactory.group('Or', trees);
}
static intersect(...trees) {
const result = ConditionTreeFactory.group('And', trees);
const isEmptyAnd = result instanceof branch_1.default &&
result.aggregator === 'And' &&
result.conditions.length === 0;
return isEmptyAnd ? null : result;
}
static fromPlainObject(json) {
if (json === null)
return null;
if (ConditionTreeFactory.isLeaf(json)) {
return new leaf_1.default(json.field, json.operator, json.value);
}
if (ConditionTreeFactory.isBranch(json)) {
const branch = new branch_1.default(json.aggregator, json.conditions.map(subTree => ConditionTreeFactory.fromPlainObject(subTree)));
return branch.conditions.length !== 1 ? branch : branch.conditions[0];
}
throw new Error('Failed to instantiate condition tree from json');
}
static matchFields(fields, values) {
if (values.length === 0)
return ConditionTreeFactory.MatchNone;
if (fields.length === 1) {
const fieldValues = values.map(tuple => tuple[0]);
return fieldValues.length > 1
? new leaf_1.default(fields[0], 'In', fieldValues)
: new leaf_1.default(fields[0], 'Equal', fieldValues[0]);
}
const [firstField, ...otherFields] = fields;
const groups = new Map();
for (const [firstValue, ...otherValues] of values) {
if (groups.has(firstValue))
groups.get(firstValue).push(otherValues);
else
groups.set(firstValue, [otherValues]);
}
return ConditionTreeFactory.union(...[...groups.entries()].map(([firstValue, subValues]) => ConditionTreeFactory.intersect(ConditionTreeFactory.matchFields([firstField], [[firstValue]]), ConditionTreeFactory.matchFields(otherFields, subValues))));
}
static group(aggregator, trees) {
const conditions = trees
.filter(Boolean)
.reduce((currentConditions, tree) => tree instanceof branch_1.default && tree.aggregator === aggregator
? [...currentConditions, ...tree.conditions]
: [...currentConditions, tree], []);
if (conditions.length === 1) {
return conditions[0];
}
return new branch_1.default(aggregator, conditions);
}
static isLeaf(raw) {
return typeof raw === 'object' && 'field' in raw && 'operator' in raw;
}
static isBranch(raw) {
return typeof raw === 'object' && 'aggregator' in raw && 'conditions' in raw;
}
}
exports.default = ConditionTreeFactory;
ConditionTreeFactory.MatchNone = new branch_1.default('Or', []);
ConditionTreeFactory.MatchAll = null;
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FHLENBQUM7SUFDeEUsQ0FBQztJQUVPLE1BQU0sQ0FBQyxRQUFRLENBQ3JCLEdBQVk7UUFFWixPQUFPLE9BQU8sR0FBRyxLQUFLLFFBQVEsSUFBSSxZQUFZLElBQUksR0FBRyxJQUFJLFlBQVksSUFBSSxHQUFHLENBQUM7SUFDL0UsQ0FBQzs7QUF4SEgsdUNBeUhDO0FBeEhRLDhCQUFTLEdBQWtCLElBQUksZ0JBQW1CLENBQUMsSUFBSSxFQUFFLEVBQUUsQ0FBQyxDQUFDO0FBQzdELDZCQUFRLEdBQWtCLElBQUksQ0FBQyJ9