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annotate src/tabulate.ts @ 100:ad08e5e25fc9

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revert jsonld a few years to avoid a vite/commonjs build issue the newer jsonld has this dep graph: jsonld 5.2.0 └─┬ rdf-canonize 3.0.0 └── setimmediate 1.0.5 and that setimmediate uses strict in a way that breaks the build, etc.
author drewp@bigasterisk.com
date Fri, 11 Feb 2022 22:57:23 -0800
parents 26c55d5d5202
children
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1 // Organize graph data into tables (column orders, etc) for the view layer.
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2
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3 import Immutable from "immutable"; // mostly using this for the builtin equals() testing, since NamedNode(x)!=NamedNode(x)
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4 import {
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5 DataFactory,
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6 NamedNode,
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7 Quad,
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8 Quad_Object,
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9 Store,
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10 Term,
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11 Util,
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12 } from "n3";
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13 import { TableDesc } from "./view_loader";
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14
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15 const { namedNode } = DataFactory;
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16
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17 // // import ns from 'n3/src/IRIs';
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18 // // const { rdf } = ns;
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19 export const rdf = {
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20 type: namedNode("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"),
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21 };
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22
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23 type UriSet = Immutable.Set<NamedNode>;
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24 export type TypeToSubjs = Immutable.Map<NamedNode, UriSet>;
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25
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26 // https://github.com/rdfjs/N3.js/issues/265
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27 if ((NamedNode.prototype as any).hashCode === undefined) {
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28 (NamedNode.prototype as any).hashCode = () => 0;
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29 }
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30
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31 function getType(graph: Store, subj: NamedNode): NamedNode | null {
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32 let subjType: NamedNode | null = null;
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33
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34 graph.forObjects(
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35 (o: Quad_Object) => {
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36 subjType = o as NamedNode;
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37 },
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38 subj,
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39 rdf.type,
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40 null
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41 );
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42 return subjType;
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43 }
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44
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45 // When there are multiple types, an arbitrary one is used.
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46 export function groupByRdfType(
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47 graph: Store
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48 ): { byType: TypeToSubjs; typesPresent: NamedNode[]; untypedSubjs: NamedNode[] } {
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49 let byType: TypeToSubjs = Immutable.Map();
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50 let untyped: UriSet = Immutable.Set(); // subjs
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51 const internSubjs = new Map<string, NamedNode>();
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52 graph.forEach(
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53 (q) => {
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54 if (!Util.isNamedNode(q.subject)) {
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55 throw new Error("unsupported " + q.subject.value);
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56 }
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57 const subj = q.subject as NamedNode;
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58
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59 const subjType = getType(graph, subj);
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60
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61 if (subjType !== null) {
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62 // (subj, rdf:type, subjType) in graph
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63 const oldKeys = Array.from(byType.keys());
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64 const oldVal = byType.get(subjType, Immutable.Set<NamedNode>());
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65 const newVal = oldVal.add(subj);
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66 byType = byType.set(subjType, newVal);
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67 } else {
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68 untyped = untyped.add(subj);
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69 }
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70 },
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71 null,
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72 null,
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73 null,
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74 null
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75 );
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76
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77 const typesPresent = Array.from(byType.keys());
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78 typesPresent.sort();
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79
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80 const untypedSubjs = Array.from(untyped.values());
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81 untypedSubjs.sort();
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82 return { byType: byType, typesPresent: typesPresent, untypedSubjs: untypedSubjs };
88
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83 }
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84
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85 export function predsForSubj(graph: Store, typeUri: NamedNode): NamedNode[] {
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86 const predsSet: Set<NamedNode> = new Set();
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87 graph.forEach(
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88 (q: Quad) => {
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89 predsSet.add(q.predicate as NamedNode);
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90 },
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91 typeUri,
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92 null,
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93 null,
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94 null
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95 );
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96 const preds = Array.from(predsSet.values());
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97 preds.sort();
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98 return preds;
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99 }
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100
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101 interface ISP {
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102 subj: NamedNode;
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103 pred: NamedNode;
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104 }
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105 const SP = Immutable.Record<ISP>({
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106 subj: new NamedNode(""),
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107 pred: new NamedNode(""),
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108 });
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109
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110 export class MultiSubjsTypeBlockLayout {
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111 subjs: NamedNode[];
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112 preds: NamedNode[];
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113 graphCells: Immutable.Map<ISP, Immutable.Set<Term>>;
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114 constructor(graph: Store, byType: TypeToSubjs, table: TableDesc) {
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115 const subjSet = byType.get(table.primary);
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116 this.subjs = subjSet ? Array.from(subjSet) : [];
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117 this.subjs.sort();
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118
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119 let preds = Immutable.Set<NamedNode>();
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120
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121 this.graphCells = Immutable.Map<ISP, Immutable.Set<Term>>().withMutations(
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122 (mutGraphCells) => {
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123 this.subjs.forEach((subj: NamedNode) => {
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124 graph.forEach(
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125 (q: Quad) => {
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126 if (!Util.isNamedNode(q.predicate)) {
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127 throw new Error();
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128 }
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129
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130 const pred = q.predicate as NamedNode;
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131 if (pred.equals(rdf.type)) {
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132 // the whole block is labeled with the type
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133 return;
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134 }
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135 preds = preds.add(pred);
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136 const cellKey = this.makeCellKey(subj, pred);
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137 mutGraphCells.set(
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138 cellKey,
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139 mutGraphCells.get(cellKey, Immutable.Set<Term>()).add(q.object)
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140 );
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141 },
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142 subj,
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143 null,
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144 null,
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145 null
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146 );
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147 });
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148 }
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149 );
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150 this.preds = Array.from(preds);
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151 this.preds.splice(this.preds.indexOf(rdf.type), 1);
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152 // also pull out label, which should be used on 1st column
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153 this.preds.sort();
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154 }
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155
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156 makeCellKey(subj: NamedNode, pred: NamedNode): ISP {
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157 return SP({
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drewp@bigasterisk.com
parents:
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158 subj: subj,
ac7ad087d474 graph view rewrites and fixes for the multi-subject table
drewp@bigasterisk.com
parents:
diff changeset
159 pred: pred,
ac7ad087d474 graph view rewrites and fixes for the multi-subject table
drewp@bigasterisk.com
parents:
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160 });
ac7ad087d474 graph view rewrites and fixes for the multi-subject table
drewp@bigasterisk.com
parents:
diff changeset
161 }
ac7ad087d474 graph view rewrites and fixes for the multi-subject table
drewp@bigasterisk.com
parents:
diff changeset
162 }