@meterio/flex-framework
Version:
A library implements Meter Flex interface
66 lines • 4.9 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.newEventVisitor = void 0;
const filter_1 = require("./filter");
const rules_1 = require("./rules");
function newEventVisitor(ctx, addr, coder) {
const encode = (indexed) => {
const topics = coder.encode(indexed);
return {
address: addr,
topic0: topics[0] || undefined,
topic1: topics[1] || undefined,
topic2: topics[2] || undefined,
topic3: topics[3] || undefined,
topic4: topics[4] || undefined
};
};
return {
asCriteria: indexed => {
try {
return encode(indexed);
}
catch (err) {
throw new rules_1.BadParameter(`arg0: can not be encoded (${err.message})`);
}
},
filter: (indexed) => {
rules_1.test(indexed, [{}], 'arg0');
if (indexed.length === 0) {
indexed = [{}];
}
const criteriaSet = indexed.map((o, i) => {
try {
return encode(o);
}
catch (err) {
throw new rules_1.BadParameter(`arg0.#${i}: can not be encoded (${err.message})`);
}
});
const filter = filter_1.newFilter(ctx, 'event').criteria(criteriaSet);
return {
criteria(set) {
filter.criteria(set);
return this;
},
range(range) {
filter.range(range);
return this;
},
order(order) {
filter.order(order);
return this;
},
apply(offset, limit) {
return filter.apply(offset, limit)
.then(events => events.map(event => {
const decoded = coder.decode(event.data, event.topics);
return Object.assign(Object.assign({}, event), { decoded });
}));
}
};
}
};
}
exports.newEventVisitor = newEventVisitor;
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