47 lines
1.4 KiB
TypeScript
47 lines
1.4 KiB
TypeScript
import type { JavaScriptJsonModuleObservation } from "./JavaScriptArtifactAnalysisTypes.js";
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import type { JavaScriptArtifactFile } from "./JavaScriptArtifactFiles.js";
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/** Parse one approved JSON module without evaluating JavaScript or resolving imports. */
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export const analyzeJavaScriptJsonModule = (
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file: JavaScriptArtifactFile,
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): JavaScriptJsonModuleObservation => {
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if (!file.text.included)
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return {
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path: file.path,
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sha256: file.sha256,
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status: "unavailable",
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top_level_keys: [],
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omitted_top_level_keys: null,
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limitation: `JSON module text was unavailable: ${file.text.reason}.`,
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};
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let value: unknown;
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try {
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value = JSON.parse(file.text.value);
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} catch {
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return {
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path: file.path,
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sha256: file.sha256,
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status: "invalid",
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top_level_keys: [],
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omitted_top_level_keys: 0,
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limitation: "JSON module is not valid JSON.",
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};
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}
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const keys =
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typeof value === "object" && value !== null && !Array.isArray(value)
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? Object.keys(value).sort(compareCodePoints)
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: [];
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const retained = keys.slice(0, 128);
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return {
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path: file.path,
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sha256: file.sha256,
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status: "included",
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top_level_keys: retained,
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omitted_top_level_keys: keys.length - retained.length,
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limitation: null,
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};
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};
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const compareCodePoints = (left: string, right: string): number =>
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left < right ? -1 : left > right ? 1 : 0;
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