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Diffstat (limited to 'src/util/strings.js')
| -rw-r--r-- | src/util/strings.js | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/src/util/strings.js b/src/util/strings.js deleted file mode 100644 index e749b94..0000000 --- a/src/util/strings.js +++ /dev/null @@ -1,287 +0,0 @@ -import { logError, logWarn } from './cli.js'; -import { bindOpts } from './sugar.js'; - -// Localiz8tion time! Or l10n as the neeeeeeeerds call it. Which is a terri8le -// name and not one I intend on using, thank you very much. (Don't even get me -// started on """"a11y"""".) -// -// All the default strings are in strings-default.json, if you're curious what -// those actually look like. Pretty much it's "I like {ANIMAL}" for example. -// For each language, the o8ject gets turned into a single function of form -// f(key, {args}). It searches for a key in the o8ject and uses the string it -// finds (or the one in strings-default.json) as a templ8 evaluated with the -// arguments passed. (This function gets treated as an o8ject too; it gets -// the language code attached.) -// -// The function's also responsi8le for getting rid of dangerous characters -// (quotes and angle tags), though only within the templ8te (not the args), -// and it converts the keys of the arguments o8ject from camelCase to -// CONSTANT_CASE too. -// -// This function also takes an optional "bindUtilities" argument; it should -// look like a dictionary each value of which is itself a util dictionary, -// each value of which is a function in the format (value, opts) => (...). -// Each of those util dictionaries will 8e attached to the final returned -// strings() function, containing functions which automatically have that -// same strings() function provided as part of its opts argument (alongside -// any additional arguments passed). -// -// Basically, it's so that instead of doing: -// -// count.tracks(album.tracks.length, {strings}) -// -// ...you can just do: -// -// strings.count.tracks(album.tracks.length) -// -// Definitely note bindUtilities expects an OBJECT, not an array, otherwise -// it won't 8e a8le to know what keys to attach the utilities 8y! -// -// Oh also it'll need access to the he.encode() function, and callers have to -// provide that themselves, 'cuz otherwise we can't reference this file from -// client-side code. -export function genStrings(stringsJSON, { - he, - defaultJSON = null, - bindUtilities = [] -}) { - // genStrings will only 8e called once for each language, and it happens - // right at the start of the program (or at least 8efore 8uilding pages). - // So, now's a good time to valid8te the strings and let any warnings be - // known. - - // May8e contrary to the argument name, the arguments should 8e o8jects, - // not actual JSON-formatted strings! - if (typeof stringsJSON !== 'object' || stringsJSON.constructor !== Object) { - return {error: `Expected an object (parsed JSON) for stringsJSON.`}; - } - if (typeof defaultJSON !== 'object') { // typeof null === object. I h8 JS. - return {error: `Expected an object (parsed JSON) or null for defaultJSON.`}; - } - - // All languages require a language code. - const code = stringsJSON['meta.languageCode']; - if (!code) { - return {error: `Missing language code.`}; - } - if (typeof code !== 'string') { - return {error: `Expected language code to be a string.`}; - } - - // Every value on the provided o8ject should be a string. - // (This is lazy, but we only 8other checking this on stringsJSON, on the - // assumption that defaultJSON was passed through this function too, and so - // has already been valid8ted.) - { - let err = false; - for (const [ key, value ] of Object.entries(stringsJSON)) { - if (typeof value !== 'string') { - logError`(${code}) The value for ${key} should be a string.`; - err = true; - } - } - if (err) { - return {error: `Expected all values to be a string.`}; - } - } - - // Checking is generally done against the default JSON, so we'll skip out - // if that isn't provided (which should only 8e the case when it itself is - // 8eing processed as the first loaded language). - if (defaultJSON) { - // Warn for keys that are missing or unexpected. - const expectedKeys = Object.keys(defaultJSON); - const presentKeys = Object.keys(stringsJSON); - for (const key of presentKeys) { - if (!expectedKeys.includes(key)) { - logWarn`(${code}) Unexpected translation key: ${key} - this won't be used!`; - } - } - for (const key of expectedKeys) { - if (!presentKeys.includes(key)) { - logWarn`(${code}) Missing translation key: ${key} - this won't be localized!`; - } - } - } - - // Valid8tion is complete, 8ut We can still do a little caching to make - // repeated actions faster. - - // We're gonna 8e mut8ting the strings dictionary o8ject from here on out. - // We make a copy so we don't mess with the one which was given to us. - stringsJSON = Object.assign({}, stringsJSON); - - // Preemptively pass everything through HTML encoding. This will prevent - // strings from embedding HTML tags or accidentally including characters - // that throw HTML parsers off. - for (const key of Object.keys(stringsJSON)) { - stringsJSON[key] = he.encode(stringsJSON[key], {useNamedReferences: true}); - } - - // It's time to cre8te the actual langauge function! - - // In the function, we don't actually distinguish 8etween the primary and - // default (fall8ack) strings - any relevant warnings have already 8een - // presented a8ove, at the time the language JSON is processed. Now we'll - // only 8e using them for indexing strings to use as templ8tes, and we can - // com8ine them for that. - const stringIndex = Object.assign({}, defaultJSON, stringsJSON); - - // We do still need the list of valid keys though. That's 8ased upon the - // default strings. (Or stringsJSON, 8ut only if the defaults aren't - // provided - which indic8tes that the single o8ject provided *is* the - // default.) - const validKeys = Object.keys(defaultJSON || stringsJSON); - - const invalidKeysFound = []; - - const strings = (key, args = {}) => { - // Ok, with the warning out of the way, it's time to get to work. - // First make sure we're even accessing a valid key. (If not, return - // an error string as su8stitute.) - if (!validKeys.includes(key)) { - // We only want to warn a8out a given key once. More than that is - // just redundant! - if (!invalidKeysFound.includes(key)) { - invalidKeysFound.push(key); - logError`(${code}) Accessing invalid key ${key}. Fix a typo or provide this in strings-default.json!`; - } - return `MISSING: ${key}`; - } - - const template = stringIndex[key]; - - // Convert the keys on the args dict from camelCase to CONSTANT_CASE. - // (This isn't an OUTRAGEOUSLY versatile algorithm for doing that, 8ut - // like, who cares, dude?) Also, this is an array, 8ecause it's handy - // for the iterating we're a8out to do. - const processedArgs = Object.entries(args) - .map(([ k, v ]) => [k.replace(/[A-Z]/g, '_$&').toUpperCase(), v]); - - // Replacement time! Woot. Reduce comes in handy here! - const output = processedArgs.reduce( - (x, [ k, v ]) => x.replaceAll(`{${k}}`, v), - template); - - // Post-processing: if any expected arguments *weren't* replaced, that - // is almost definitely an error. - if (output.match(/\{[A-Z_]+\}/)) { - logError`(${code}) Args in ${key} were missing - output: ${output}`; - } - - return output; - }; - - // And lastly, we add some utility stuff to the strings function. - - // Store the language code, for convenience of access. - strings.code = code; - - // Store the strings dictionary itself, also for convenience. - strings.json = stringsJSON; - - // Store Intl o8jects that can 8e reused for value formatting. - strings.intl = { - date: new Intl.DateTimeFormat(code, {full: true}), - number: new Intl.NumberFormat(code), - list: { - conjunction: new Intl.ListFormat(code, {type: 'conjunction'}), - disjunction: new Intl.ListFormat(code, {type: 'disjunction'}), - unit: new Intl.ListFormat(code, {type: 'unit'}) - }, - plural: { - cardinal: new Intl.PluralRules(code, {type: 'cardinal'}), - ordinal: new Intl.PluralRules(code, {type: 'ordinal'}) - } - }; - - // And the provided utility dictionaries themselves, of course! - for (const [key, utilDict] of Object.entries(bindUtilities)) { - const boundUtilDict = {}; - for (const [key, fn] of Object.entries(utilDict)) { - boundUtilDict[key] = bindOpts(fn, {strings}); - } - strings[key] = boundUtilDict; - } - - return strings; -} - -const countHelper = (stringKey, argName = stringKey) => (value, {strings, unit = false}) => strings( - (unit - ? `count.${stringKey}.withUnit.` + strings.intl.plural.cardinal.select(value) - : `count.${stringKey}`), - {[argName]: strings.intl.number.format(value)}); - -export const count = { - date: (date, {strings}) => { - return strings.intl.date.format(date); - }, - - dateRange: ([startDate, endDate], {strings}) => { - return strings.intl.date.formatRange(startDate, endDate); - }, - - duration: (secTotal, {strings, approximate = false, unit = false}) => { - if (secTotal === 0) { - return strings('count.duration.missing'); - } - - const hour = Math.floor(secTotal / 3600); - const min = Math.floor((secTotal - hour * 3600) / 60); - const sec = Math.floor(secTotal - hour * 3600 - min * 60); - - const pad = val => val.toString().padStart(2, '0'); - - const stringSubkey = unit ? '.withUnit' : ''; - - const duration = (hour > 0 - ? strings('count.duration.hours' + stringSubkey, { - hours: hour, - minutes: pad(min), - seconds: pad(sec) - }) - : strings('count.duration.minutes' + stringSubkey, { - minutes: min, - seconds: pad(sec) - })); - - return (approximate - ? strings('count.duration.approximate', {duration}) - : duration); - }, - - index: (value, {strings}) => { - return strings('count.index.' + strings.intl.plural.ordinal.select(value), {index: value}); - }, - - number: value => strings.intl.number.format(value), - - words: (value, {strings, unit = false}) => { - const num = strings.intl.number.format(value > 1000 - ? Math.floor(value / 100) / 10 - : value); - - const words = (value > 1000 - ? strings('count.words.thousand', {words: num}) - : strings('count.words', {words: num})); - - return strings('count.words.withUnit.' + strings.intl.plural.cardinal.select(value), {words}); - }, - - albums: countHelper('albums'), - commentaryEntries: countHelper('commentaryEntries', 'entries'), - contributions: countHelper('contributions'), - coverArts: countHelper('coverArts'), - timesReferenced: countHelper('timesReferenced'), - timesUsed: countHelper('timesUsed'), - tracks: countHelper('tracks') -}; - -const listHelper = type => (list, {strings}) => strings.intl.list[type].format(list); - -export const list = { - unit: listHelper('unit'), - or: listHelper('disjunction'), - and: listHelper('conjunction') -}; |