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import { createFeaturevisor } from "@featurevisor/sdk";
import { applyContextToConditions } from "./applyContextToConditions";
import { applyContextToSegments } from "./applyContextToSegments";
function parseIfStringified<T>(value: T): T {
if (typeof value !== "string" || value === "*") {
return value;
}
const firstChar = value[0];
if (firstChar !== "{" && firstChar !== "[") {
return value;
}
try {
return JSON.parse(value) as T;
} catch {
return value;
}
}
export function applyContextToDatafile(
originalDatafileContent: DatafileContent,
context: Context,
): DatafileContent {
const originalFeaturevisor = createFeaturevisor({
datafile: originalDatafileContent,
logLevel: "fatal",
});
const contextualDatafileContent: DatafileContent = JSON.parse(
JSON.stringify(originalDatafileContent),
);
const removeSegments: string[] = [];
// segments
for (const segmentKey in contextualDatafileContent.segments) {
const segment = contextualDatafileContent.segments[segmentKey];
const originalConditions = segment.conditions;
const contextualConditions = applyContextToConditions(
originalFeaturevisor,
originalConditions,
context,
);
contextualDatafileContent.segments[segmentKey].conditions = contextualConditions;
if (contextualConditions === "*") {
removeSegments.push(segmentKey);
}
}
// features
for (const featureKey in contextualDatafileContent.features) {
const feature = contextualDatafileContent.features[featureKey];
// force
if (feature.force) {
for (let forceI = 0; forceI < feature.force.length; forceI++) {
const force = feature.force[forceI];
// segments
if (force.segments) {
feature.force[forceI].segments = applyContextToSegments(
originalFeaturevisor,
force.segments,
context,
removeSegments,
);
}
// conditions
if (force.conditions) {
feature.force[forceI].conditions = applyContextToConditions(
originalFeaturevisor,
force.conditions,
context,
);
}
}
}
// traffic
const originalTrafficSegments: (string | string[] | object | undefined)[] = [];
Eif (feature.traffic) {
for (let trafficI = 0; trafficI < feature.traffic.length; trafficI++) {
const traffic = feature.traffic[trafficI];
// Store original segments before applying context
originalTrafficSegments[trafficI] = traffic.segments;
// segments
Eif (traffic.segments) {
const segments = parseIfStringified(traffic.segments);
feature.traffic[trafficI].segments = applyContextToSegments(
originalFeaturevisor,
segments,
context,
removeSegments,
);
}
// variable overrides
if (traffic.variableOverrides) {
for (const variableKey in traffic.variableOverrides) {
const variableOverrides = traffic.variableOverrides[variableKey];
for (
let variableOverrideI = 0;
variableOverrideI < variableOverrides.length;
variableOverrideI++
) {
const variableOverride = variableOverrides[variableOverrideI];
// segments
if (variableOverride.segments) {
const segments = parseIfStringified(variableOverride.segments);
variableOverride.segments = applyContextToSegments(
originalFeaturevisor,
segments,
context,
removeSegments,
);
}
// conditions
if (variableOverride.conditions) {
const conditions = parseIfStringified(variableOverride.conditions);
variableOverride.conditions = applyContextToConditions(
originalFeaturevisor,
conditions,
context,
);
}
variableOverrides[variableOverrideI] = variableOverride;
}
}
}
}
}
// variation
if (feature.variations) {
const variations = feature.variations;
for (let variationI = 0; variationI < variations.length; variationI++) {
const variation = variations[variationI];
// variable overrides
if (variation.variableOverrides) {
for (const variableKey in variation.variableOverrides) {
const variableOverrides = variation.variableOverrides[variableKey];
for (
let variableOverrideI = 0;
variableOverrideI < variableOverrides.length;
variableOverrideI++
) {
const variableOverride = variableOverrides[variableOverrideI];
// segments
if (variableOverride.segments) {
variableOverride.segments = applyContextToSegments(
originalFeaturevisor,
variableOverride.segments,
context,
removeSegments,
);
}
// conditions
if (variableOverride.conditions) {
variableOverride.conditions = applyContextToConditions(
originalFeaturevisor,
variableOverride.conditions,
context,
);
}
variableOverrides[variableOverrideI] = variableOverride;
}
}
}
feature.variations[variationI] = variation;
}
}
// feature traffic consecutive segments with `*` removal
Eif (feature.traffic) {
const newTrafficArray: Traffic[] = [];
let lastAddedTraffic: Traffic | undefined;
for (let i = 0; i < feature.traffic.length; i++) {
let shouldAdd = true;
const currentTraffic = feature.traffic[i];
if (
lastAddedTraffic &&
lastAddedTraffic.segments === "*" &&
currentTraffic.segments === "*"
) {
shouldAdd = false;
}
if (shouldAdd) {
newTrafficArray.push(currentTraffic);
lastAddedTraffic = currentTraffic;
}
}
feature.traffic = newTrafficArray;
}
contextualDatafileContent.features[featureKey] = feature;
}
// remove segments
for (const removeSegment of removeSegments) {
delete contextualDatafileContent.segments[removeSegment];
}
return contextualDatafileContent;
}
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