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HealthLog/src/lib/targets/source-link.ts
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TypeScript

/**
* Resolves the guideline-source citation URL for a target, keyed off
* the target `type` and (for pulse) substrings of the `source` label.
* Pure function with no React coupling so every surface that shows a
* target citation resolves the identical URL — the link can never drift.
*/
export interface TargetSourceLinkInput {
type: string;
source: string;
}
export function getTargetSourceLink(
target: TargetSourceLinkInput,
): string | null {
if (target.type === "WEIGHT" || target.type === "BMI") {
return "https://www.who.int/news-room/fact-sheets/detail/obesity-and-overweight";
}
if (
target.type === "BLOOD_PRESSURE" ||
target.type === "BLOOD_PRESSURE_IN_TARGET"
) {
return "https://academic.oup.com/eurheartj/article/39/33/3021/5079119";
}
if (target.type === "PULSE") {
if (target.source.includes("CDC/NCHS")) {
return "https://www.cdc.gov/nchs/data/nhsr/nhsr041.pdf";
}
if (target.source.includes("AHA")) {
return "https://www.heart.org/en/health-topics/high-blood-pressure/the-facts-about-high-blood-pressure/all-about-heart-rate-pulse";
}
}
if (target.type === "SLEEP_DURATION") {
return "https://aasm.org/seven-or-more-hours-of-sleep-per-night-a-health-necessity-for-adults/";
}
if (target.type === "BODY_FAT") {
return "https://www.acefitness.org/resources/everyone/blog/6596/what-are-the-guidelines-for-percentage-of-body-fat-loss/";
}
if (target.type === "ACTIVITY_STEPS") {
return "https://www.who.int/publications/i/item/9789240015128";
}
return null;
}