All files / packages/design-system/scripts/scs file-parser.js

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import * as autoVersion from './version-utils.js';
import _ from 'lodash';
 
// Separate from `templates` — pearl has its own independent version and release cadence,
// and would otherwise be picked up by updateSlds2SemverEntries (which matches on 'slds-plus').
const pearlTemplate = {
  filePath: 'slds/slds-plus-pearl-subtheme-.css',
  contentType: 'text/css',
  name: 'slds-plus-pearl-subtheme.css',
  properties: { version: '' },
};
 
const templates = [
  {
    filePath: 'slds/slds-.css',
    contentType: 'text/css',
    name: 'slds.css',
    properties: {
      version: '',
    },
  },
  {
    filePath: 'slds/slds-offline-.css',
    contentType: 'text/css',
    name: 'slds-offline.css',
    properties: {
      version: '',
    },
  },
  {
    filePath: 'slds/slds-legacy-.css',
    contentType: 'text/css',
    name: 'slds-legacy.css',
    properties: {
      version: '',
    },
  },
  {
    filePath: 'slds/slds-touch-.css',
    contentType: 'text/css',
    name: 'slds-touch.css',
    properties: {
      version: '',
    },
  },
  {
    filePath: 'slds/slds-plus-.css',
    contentType: 'text/css',
    name: 'slds-plus.css',
    properties: {
      version: '',
    },
  },
  {
    filePath: 'slds/scoped-slds-plus-.css',
    contentType: 'text/css',
    name: 'scoped-slds-plus.css',
    properties: {
      version: '',
    },
  },
  {
    filePath: 'slds/slds-plus-theme-layer-.css',
    contentType: 'text/css',
    name: 'slds-plus-theme-layer.css',
    properties: {
      version: '',
    },
  },
];
 
/**
 * Parametric file parser — processes whichever version args are supplied,
 * leaves other families untouched.
 *
 * @param {Object} opts
 * @param {string|null} opts.sldsVersionSemver - SLDS1 version (null to skip)
 * @param {number|null} opts.lwrMappedVersion - LWR mapped version (null to skip)
 * @param {Object} opts.originalData - Current files.json data
 * @param {Object[]} [opts.rejectFiles=[]] - Accumulator for rejected files
 * @param {number[]} [opts.versionRetentionLimit=[3,3,3]] - Version retention limits
 * @param {string|null} [opts.slds2VersionSemver=null] - SLDS2/+ version (null to skip)
 * @param {string|null} [opts.pearlVersionSemver=null] - pearl subtheme version (null to skip)
 * @returns {[Object, Object[]]} - [updatedData, rejectedFiles]
 */
export function FileParser({
  sldsVersionSemver = null,
  lwrMappedVersion = null,
  originalData,
  rejectFiles = [],
  versionRetentionLimit = [3, 3, 3],
  slds2VersionSemver = null,
  pearlVersionSemver = null,
}) {
  const jsonData = _.cloneDeep(originalData);
  let files = jsonData.files;
 
  // pearl-only mode: just add pearl entry, no retention for other families
  Iif (pearlVersionSemver && hasValidSemver(pearlVersionSemver) && !sldsVersionSemver && !slds2VersionSemver) {
    const pearlEntry = createSldsSemverFile(pearlVersionSemver)(_.cloneDeep(pearlTemplate));
    const exists = files.some((f) => f.filePath === pearlEntry.filePath);
    if (!exists) {
      jsonData.files.push(pearlEntry);
    }
    return [jsonData, []];
  }
 
  // Full mode requires valid SLDS version
  if (!sldsVersionSemver || !hasValidSemver(sldsVersionSemver)) return [originalData, []];
 
  let [lwr, semver] = _.partition(files, isLWRFileEntry);
 
  // add any missing semver entries for legacy LWR entries
  const semverEntriesFromLWR = generateSemverEntriesFromLWR(lwr);
 
  // Combine semver entries with those generated from LWR
  semver = semver.concat(semverEntriesFromLWR);
 
  // generate complete set of LWR entries
  // eslint-disable-next-line no-useless-assignment
  lwr = updateLWREntries(lwr, sldsVersionSemver, lwrMappedVersion);
 
  // Separate SLDS and SLDS+ files for independent version retention
  let [sldsPlusFiles, sldsFiles] = _.partition(semver, isSldsPlusFile);
 
  // generate complete set of semver entries for SLDS files
  sldsFiles = updateSemverEntries(sldsFiles, sldsVersionSemver);
 
  // generate semver entries for SLDS+ files if version provided
  if (slds2VersionSemver && hasValidSemver(slds2VersionSemver)) {
    sldsPlusFiles = updateSlds2SemverEntries(sldsPlusFiles, slds2VersionSemver);
  }
 
  // Apply version retention separately for SLDS files
  sldsFiles = _.uniqBy(
    sldsFiles,
    (entry) => `${entry.properties.version}---${entry.name}`,
  ).reverse();
 
  let sldsGrpVer = filesToGroups('major')(sldsFiles);
  sldsGrpVer = _.mapValues(sldsGrpVer, filesToGroups('minor'));
  sldsGrpVer = _.mapValues(sldsGrpVer, (g) =>
    _.mapValues(g, filesToGroups('patch')),
  );
  sldsGrpVer = filterGroups(versionRetentionLimit, sldsGrpVer);
  const filteredSldsFiles = groupsToFiles(sldsGrpVer);
 
  // Separate theme-layer files -- they are exempt from version retention
  let [themeLayerFiles, retainedPlusFiles] = _.partition(
    sldsPlusFiles,
    isThemeLayerFile,
  );
 
  // Deduplicate theme-layer files (no pruning)
  themeLayerFiles = _.uniqBy(
    themeLayerFiles,
    (entry) => `${entry.properties.version}---${entry.name}`,
  );
 
  // Separate pearl-subtheme files — exempt from version retention
  let [pearlFiles, remainingPlusFiles] = _.partition(
    retainedPlusFiles,
    isPearlSubthemeFile,
  );
  pearlFiles = _.uniqBy(
    pearlFiles,
    (entry) => `${entry.properties.version}---${entry.name}`,
  );
 
  // Add new pearl entry if version supplied alongside full release
  Iif (pearlVersionSemver && hasValidSemver(pearlVersionSemver)) {
    const newPearlEntry = createSldsSemverFile(pearlVersionSemver)(_.cloneDeep(pearlTemplate));
    const exists = pearlFiles.some((f) => f.filePath === newPearlEntry.filePath);
    if (!exists) {
      pearlFiles.push(newPearlEntry);
    }
  }
 
  // Apply version retention separately for SLDS+ files (excluding theme-layer and pearl)
  remainingPlusFiles = _.uniqBy(
    remainingPlusFiles,
    (entry) => `${entry.properties.version}---${entry.name}`,
  ).reverse();
 
  let sldsPlusGrpVer = filesToGroups('major')(remainingPlusFiles);
  sldsPlusGrpVer = _.mapValues(sldsPlusGrpVer, filesToGroups('minor'));
  sldsPlusGrpVer = _.mapValues(sldsPlusGrpVer, (g) =>
    _.mapValues(g, filesToGroups('patch')),
  );
  sldsPlusGrpVer = filterGroups(versionRetentionLimit, sldsPlusGrpVer);
  const filteredSldsPlusFiles = groupsToFiles(sldsPlusGrpVer);
 
  // Combine all files (theme-layer and pearl entries bypass retention)
  jsonData.files = [...filteredSldsFiles, ...filteredSldsPlusFiles, ...themeLayerFiles, ...pearlFiles];
 
  const keepPaths = jsonData.files.reduce((acc, file) => {
    acc[file.filePath] = true;
    return acc;
  }, {});
 
  rejectFiles = _.uniqBy(
    rejectFiles.concat(
      originalData.files.filter((file) => !keepPaths[file.filePath]),
    ),
    'filePath',
  );
 
  return [jsonData, rejectFiles];
}
 
const generateSemverEntriesFromLWR = (files) =>
  files
    .map((file) =>
      templates
        .filter((t) => t.name === file.name)
        .map(createSldsSemverFile(getVersionStringFromFilename(file))),
    )
    .flat();
 
const updateLWREntries = (files, sldsVersionSemver, lwrMappedVersion) =>
  files
    .sort((a, b) => a.properties.version - b.properties.version)
    .concat(
      templates
        .map(_.cloneDeep)
        .map(createLWRFile(sldsVersionSemver, lwrMappedVersion)),
    )
    .reverse(); // ensure that uniqBy selects the newest entries
 
const updateSemverEntries = (files, sldsVersionSemver) =>
  files
    .sort((a, b) => semverDistanceFromString(a.filePath, b.filePath))
    .concat(
      templates
        .filter((t) => !t.name.includes('slds-plus'))
        .map(_.cloneDeep)
        .map(createSldsSemverFile(sldsVersionSemver)),
    )
    .reverse();
 
const updateSlds2SemverEntries = (files, slds2VersionSemver) =>
  files
    .sort((a, b) => semverDistanceFromString(a.filePath, b.filePath))
    .concat(
      templates
        .filter((t) => t.name.includes('slds-plus'))
        .map(_.cloneDeep)
        .map(createSldsSemverFile(slds2VersionSemver)),
    )
    .reverse();
 
const createSldsSemverFile = (sldsVersionString) => (file) => {
  const fileName = file.filePath.split('-').slice(0, -1).join('-');
  const filePath = `${fileName}-${sldsVersionString}.css`;
  return Object.assign({}, file, {
    filePath,
    properties: { version: sldsVersionString },
  });
};
 
const createLWRFile = (sldsVersionSemver, lwrVersion) => (file) => {
  const fileName = file.filePath.split('-').slice(0, -1).join('-');
  const filePath = `${fileName}-${sldsVersionSemver}.css`;
  return Object.assign({}, file, {
    filePath,
    properties: { version: lwrVersion.toString() },
  });
};
 
function isLWRFileVersion(version) {
  return String(parseInt(version)) == version && !isNaN(version);
}
 
function isLWRFileEntry(file) {
  const version = file.properties.version;
  return isLWRFileVersion(version);
}
 
function isSldsPlusFile(file) {
  return (
    file.filePath &&
    (file.filePath.includes('slds-plus') ||
      file.filePath.includes('scoped-slds-plus'))
  );
}
 
function isThemeLayerFile(file) {
  return file.filePath && file.filePath.includes('slds-plus-theme-layer');
}
 
function isPearlSubthemeFile(file) {
  return file.filePath && file.filePath.includes('slds-plus-pearl-subtheme');
}
 
// Sorted in descending order
const semverDistance = (b, a) => {
  const majorDif = a.major - b.major;
  const minorDif = a.minor - b.minor;
  const patchDif = a.patch - b.patch;
  return majorDif ? majorDif : minorDif ? minorDif : patchDif;
};
 
export const semverDistanceFromString = (a, b) =>
  semverDistance(autoVersion.parse(a), autoVersion.parse(b));
 
const getSemverFromFilename = (file) =>
  autoVersion.parse(getVersionStringFromFilename(file));
 
const semverRegex = /\d+\.\d+\.\d+/;
 
const getVersionStringFromFilename = (file) => {
  const versionMatch = file.filePath.match(semverRegex);
  return versionMatch ? versionMatch[0] : '0.0.0';
};
 
const hasValidSemver = (string) => semverRegex.test(string);
 
/**
 * @callback Files
 * @param {Object[]}
 */
 
/**
 * @callback GroupedFiles
 * @param {{[number]: {[number]: {[number]: Object[]}}}}
 */
 
/**
 * Group files by semver key
 * @param {'major'|'minor'|'patch'} key
 * @returns {function(Files): GroupedFiles}
 */
const filesToGroups = (key) => (files) =>
  _.groupBy(files, (f) => getSemverFromFilename(f)[key]);
 
/**
 * Filter a nested tree of file entries to the latest N versions at each level
 * @param {number[]} ns Array of number of versions to keep at each level
 * @param {GroupedFiles} groups Object of file entries nested by semver
 * @returns {GroupedFiles}
 */
const filterGroups = (ns, groups) =>
  Object.keys(groups)
    .sort(semverDistanceFromString)
    .slice(0, ns[0])
    .reduce((acc, key) => {
      const val =
        ns.length > 1 ? filterGroups(ns.slice(1), groups[key]) : groups[key];
      return Object.assign(acc, { [key]: val });
    }, {});
 
/**
 * Flatten the nested files object to an array of file entries
 * @param {GroupedFiles} groups Object of file entries nested by semver
 * @returns {Object[]}
 */
const groupsToFiles = (groups) =>
  groups.length === undefined
    ? Object.values(groups).map(groupsToFiles).flat()
    : groups;