Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 | 193x 193x 193x 193x 193x 193x 193x 193x 7951x 7951x 7951x 7951x 7951x 7951x 7951x 7951x 3x 7951x 7951x 7951x 7951x 7951x 33970x 59384x 59384x 59384x 59384x 32094x 27290x 27290x 12013x 12013x 5998x 5998x 3312x 2686x 2686x 5998x 5998x 5998x 33970x 33970x 33970x 2708x 2708x 2708x 4x 4x 2704x 2704x 2708x 755x 755x 4044x 4044x 2x 2x 3298x 3298x 794x 794x 2472x 2472x 1504x 1504x 1504x 1504x 1504x 4645x 4645x 4645x 4645x 4462x 183x 183x 4645x 4645x 11504x 11504x 11504x 4645x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 5841x 5841x 5841x 5841x 5841x 5841x 5841x 5841x 5841x 157x 157x 5841x 2298x 2298x 2298x 2298x 702x 1596x 1596x 2298x 2298x 2298x 2298x 1746x 1746x 1746x 1746x 1552x 194x 194x 1746x 1746x 4868x 1746x 10x 10x 10x 10x 10x 10x 3226x 3226x 3226x 3226x 2804x 422x 422x 3226x 12013x 3226x 626x 626x 626x 234x 392x 392x 626x | import * as operations from '../../operations'; import {JsonCrdtPatchOpcodeOverlay} from '../../constants'; import {CrdtWriter} from '../../util/binary/CrdtWriter'; import {type ITimespanStruct, type ITimestampStruct, Timestamp} from '../../clock'; import {CborEncoder} from '@jsonjoy.com/json-pack/lib/cbor/CborEncoder'; import type {JsonCrdtPatchOperation, Patch} from '../../Patch'; /** * JSON CRDT Patch "binary" codec encoder. */ export class Encoder extends CborEncoder<CrdtWriter> { private patchSid: number = 0; /** * Creates a new encoder instance. * * @param writer An optional custom implementation of CRDT writer. */ constructor(public readonly writer: CrdtWriter = new CrdtWriter()) { super(writer); } /** * Encodes a JSON CRDT Patch into a {@link Uint8Array} blob. * * @param patch A JSON CRDT Patch to encode. * @returns A {@link Uint8Array} blob containing the encoded JSON CRDT Patch. */ public encode(patch: Patch): Uint8Array { this.writer.reset(); const id = patch.getId()!; const sid = (this.patchSid = id.sid); const writer = this.writer; writer.vu57(sid); writer.vu57(id.time); const meta = patch.meta; if (meta === undefined) this.writeUndef(); else this.writeArr([meta]); this.encodeOperations(patch); return writer.flush(); } protected encodeOperations(patch: Patch): void { const ops = patch.ops; const length = ops.length; this.writer.vu57(length); for (let i = 0; i < length; i++) this.encodeOperation(ops[i]); } protected encodeId(id: ITimestampStruct) { const sessionId = id.sid; const time = id.time; const writer = this.writer; if (sessionId === this.patchSid) { writer.b1vu56(0, time); } else { writer.b1vu56(1, time); writer.vu57(sessionId); } } protected encodeTss(span: ITimespanStruct): void { this.encodeId(span); this.writer.vu57(span.span); } private writeInsStr(length: number, obj: ITimestampStruct, ref: ITimestampStruct, str: string): number { const writer = this.writer; if (length <= 0b111) { writer.u8(JsonCrdtPatchOpcodeOverlay.ins_str + length); } else { writer.u8(JsonCrdtPatchOpcodeOverlay.ins_str); writer.vu57(length); } this.encodeId(obj); this.encodeId(ref); return writer.utf8(str); } protected encodeOperation(op: JsonCrdtPatchOperation): void { const writer = this.writer; const constr = op.constructor; switch (constr) { case operations.NewConOp: { const operation = <operations.NewConOp>op; const val = operation.val; if (val instanceof Timestamp) { writer.u8(JsonCrdtPatchOpcodeOverlay.new_con + 1); this.encodeId(val); } else { writer.u8(JsonCrdtPatchOpcodeOverlay.new_con); this.writeAny(val); } break; } case operations.NewValOp: { writer.u8(JsonCrdtPatchOpcodeOverlay.new_val); break; } case operations.NewObjOp: { writer.u8(JsonCrdtPatchOpcodeOverlay.new_obj); break; } case operations.NewVecOp: { writer.u8(JsonCrdtPatchOpcodeOverlay.new_vec); break; } case operations.NewStrOp: { writer.u8(JsonCrdtPatchOpcodeOverlay.new_str); break; } case operations.NewBinOp: { writer.u8(JsonCrdtPatchOpcodeOverlay.new_bin); break; } case operations.NewArrOp: { writer.u8(JsonCrdtPatchOpcodeOverlay.new_arr); break; } case operations.InsValOp: { const operation = <operations.InsValOp>op; writer.u8(JsonCrdtPatchOpcodeOverlay.ins_val); this.encodeId(operation.obj); this.encodeId(operation.val); break; } case operations.InsObjOp: { const operation = <operations.InsObjOp>op; const data = operation.data; const length = data.length; if (length <= 0b111) { writer.u8(JsonCrdtPatchOpcodeOverlay.ins_obj + length); } else { writer.u8(JsonCrdtPatchOpcodeOverlay.ins_obj); writer.vu57(length); } this.encodeId(operation.obj); for (let i = 0; i < length; i++) { const tuple = data[i]; this.writeStr(tuple[0]); this.encodeId(tuple[1]); } break; } case operations.InsVecOp: { const operation = <operations.InsVecOp>op; const data = operation.data; const length = data.length; if (length <= 0b111) { writer.u8(JsonCrdtPatchOpcodeOverlay.ins_vec + length); } else E{ writer.u8(JsonCrdtPatchOpcodeOverlay.ins_vec); writer.vu57(length); } this.encodeId(operation.obj); for (let i = 0; i < length; i++) { const tuple = data[i]; writer.u8(tuple[0]); this.encodeId(tuple[1]); } break; } case operations.InsStrOp: { const operation = <operations.InsStrOp>op; const obj = operation.obj; const ref = operation.ref; const str = operation.data; const len1 = str.length; writer.ensureCapacity(24 + len1 * 4); const x = writer.x; const len2 = this.writeInsStr(len1, obj, ref, str); if (len1 !== len2) { writer.x = x; this.writeInsStr(len2, obj, ref, str); } break; } case operations.InsBinOp: { const operation = <operations.InsBinOp>op; const buf = operation.data; const length = buf.length; if (length <= 0b111) { writer.u8(JsonCrdtPatchOpcodeOverlay.ins_bin + length); } else { writer.u8(JsonCrdtPatchOpcodeOverlay.ins_bin); writer.vu57(length); } this.encodeId(operation.obj); this.encodeId(operation.ref); writer.buf(buf, length); break; } case operations.InsArrOp: { const operation = <operations.InsArrOp>op; const elements = operation.data; const length = elements.length; if (length <= 0b111) { writer.u8(JsonCrdtPatchOpcodeOverlay.ins_arr + length); } else { writer.u8(JsonCrdtPatchOpcodeOverlay.ins_arr); writer.vu57(length); } this.encodeId(operation.obj); this.encodeId(operation.ref); for (let i = 0; i < length; i++) this.encodeId(elements[i]); break; } case operations.UpdArrOp: { const operation = <operations.UpdArrOp>op; writer.u8(JsonCrdtPatchOpcodeOverlay.upd_arr); this.encodeId(operation.obj); this.encodeId(operation.ref); this.encodeId(operation.val); break; } case operations.DelOp: { const operation = <operations.DelOp>op; const what = operation.what; const length = what.length; if (length <= 0b111) { writer.u8(JsonCrdtPatchOpcodeOverlay.del + length); } else { writer.u8(JsonCrdtPatchOpcodeOverlay.del); writer.vu57(length); } this.encodeId(operation.obj); for (let i = 0; i < length; i++) this.encodeTss(what[i]); break; } case operations.NopOp: { const operation = <operations.NopOp>op; const length = operation.len; if (length <= 0b111) { writer.u8(JsonCrdtPatchOpcodeOverlay.nop + length); } else { writer.u8(JsonCrdtPatchOpcodeOverlay.nop); writer.vu57(length); } break; } default: { throw new Error('UNKNOWN_OP'); } } } } |