1 | import {ByteStream} from './coders/byte-stream';
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2 |
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3 | import {ByteTakeIterator} from './squeak/byte-take-iterator';
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4 | import {FieldIterator} from './squeak/field-iterator';
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5 | import {TypeIterator} from './squeak/type-iterator';
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6 | import {ReferenceFixer} from './squeak/reference-fixer';
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7 | import {ImageMediaData, SoundMediaData} from './squeak/types';
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8 |
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9 | import {toSb2FakeZipApi} from './to-sb2/fake-zip';
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10 | import {toSb2Json} from './to-sb2/json-generator';
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11 |
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12 | import {SB1Header, SB1Signature} from './sb1-file-packets';
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13 |
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14 | class SB1File {
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15 | constructor (buffer) {
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16 | this.buffer = buffer;
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17 | this.stream = new ByteStream(buffer);
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18 |
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19 | this.signature = this.stream.readStruct(SB1Signature);
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20 | this.signature.validate();
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21 |
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22 | this.infoHeader = this.stream.readStruct(SB1Header);
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23 | this.infoHeader.validate();
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24 |
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25 | this.stream.position += this.signature.infoByteLength - SB1Header.size;
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26 |
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27 | this.dataHeader = this.stream.readStruct(SB1Header);
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28 | this.dataHeader.validate();
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29 | }
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30 |
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31 | get json () {
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32 | return toSb2Json({
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33 | info: this.info(),
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34 | stageData: this.data(),
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35 | images: this.images(),
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36 | sounds: this.sounds()
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37 | });
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38 | }
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39 |
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40 | get zip () {
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41 | return toSb2FakeZipApi({
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42 |
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43 |
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44 | images: this.images(),
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45 | sounds: this.sounds()
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46 | });
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47 | }
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48 |
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49 | view () {
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50 | return {
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51 | signature: this.signature,
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52 | infoHeader: this.infoHeader,
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53 | dataHeader: this.dataHeader,
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54 | toString () {
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55 | return 'SB1File';
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56 | }
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57 | };
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58 | }
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59 |
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60 | infoRaw () {
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61 | return new ByteTakeIterator(
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62 | new FieldIterator(this.buffer, this.infoHeader.offset + SB1Header.size),
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63 | this.signature.infoByteLength + SB1Signature.size
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64 | );
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65 | }
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66 |
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67 | infoTable () {
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68 | return new TypeIterator(this.infoRaw());
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69 | }
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70 |
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71 | info () {
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72 | if (!this._info) {
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73 | this._info = new ReferenceFixer(this.infoTable()).table[0];
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74 | }
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75 | return this._info;
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76 | }
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77 |
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78 | dataRaw () {
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79 | return new ByteTakeIterator(
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80 | new FieldIterator(this.buffer, this.dataHeader.offset + SB1Header.size),
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81 | this.stream.uint8a.length
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82 | );
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83 | }
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84 |
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85 | dataTable () {
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86 | return new TypeIterator(this.dataRaw());
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87 | }
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88 |
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89 | dataFixed () {
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90 | if (!this._data) {
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91 | this._data = new ReferenceFixer(this.dataTable()).table;
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92 | }
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93 | return this._data;
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94 | }
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95 |
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96 | data () {
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97 | return this.dataFixed()[0];
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98 | }
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99 |
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100 | images () {
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101 | const unique = new Set();
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102 | return this.dataFixed().filter(obj => {
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103 | if (obj instanceof ImageMediaData) {
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104 | if (unique.has(obj.crc)) return false;
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105 | unique.add(obj.crc);
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106 | return true;
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107 | }
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108 | return false;
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109 | });
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110 | }
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111 |
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112 | sounds () {
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113 | const unique = new Set();
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114 | return this.dataFixed().filter(obj => {
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115 | if (obj instanceof SoundMediaData) {
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116 | if (unique.has(obj.crc)) return false;
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117 | unique.add(obj.crc);
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118 | return true;
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119 | }
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120 | return false;
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121 | });
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122 | }
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123 | }
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124 |
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125 | export {SB1File};
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