fixes breaking serialization of terms that serialize to strings longer than 127 chars by explicitly setting valueEncoding in level options (closes #152)

Author: jacoscaz

src/quadstore.ts

@@ -47,6 +47,8 @@ import {
   emptyObject,
   defaultIndexes,
   separator,
+  levelPutOpts,
+  levelDelOpts,
 } from './utils/constants';
 import { consumeOneByOne } from './utils/consumeonebyone';
 import { consumeInBatches } from './utils/consumeinbatches';
@@ -187,7 +189,7 @@ export class Quadstore implements Store {
       valueOffset = baseValueOffset + i * 16;
       index = indexes[i];
       const key = quadWriter.write(index.prefix, value, valueOffset, quad, index.terms, this.prefixes);
-      batch = batch.put(key, viewUint16ArrayAsUint8Array(value, valueOffset, 16));
+      batch = batch.put(key, viewUint16ArrayAsUint8Array(value, valueOffset, 16), levelPutOpts);
     }
     return batch;
   }
@@ -228,7 +230,7 @@ export class Quadstore implements Store {
     for (let i = 0, il = indexes.length, index; i < il; i += 1) {
       index = indexes[i];
       const key = quadWriter.write(index.prefix, undefined, 0, quad, index.terms, this.prefixes);
-      batch = batch.del(key);
+      batch = batch.del(key, levelDelOpts);
     }
     return batch;
   }

src/utils/constants.ts

@@ -1,5 +1,6 @@
 
-import { TermName } from '../types';
+import type { TermName } from '../types';
+import type { AbstractChainedBatchPutOptions, AbstractChainedBatchDelOptions } from 'abstract-level';
 
 export const emptyObject: { [key: string]: any } = {};
 
@@ -21,3 +22,12 @@ export const defaultIndexes: TermName[][] = [
   ['predicate', 'object', 'graph', 'subject'],
   ['graph', 'predicate', 'object', 'subject'],
 ];
+
+export const levelPutOpts: AbstractChainedBatchPutOptions<any, any, any> = {
+  keyEncoding: 'utf8',
+  valueEncoding: 'view',
+};
+
+export const levelDelOpts: AbstractChainedBatchDelOptions<any, any> = {
+  keyEncoding: 'utf8',
+};