diff options
| -rw-r--r-- | src/url-spec.js | 2 | ||||
| -rw-r--r-- | src/urls.js | 160 |
2 files changed, 127 insertions, 35 deletions
diff --git a/src/url-spec.js b/src/url-spec.js index 4c5964fc..75cd8006 100644 --- a/src/url-spec.js +++ b/src/url-spec.js @@ -85,6 +85,8 @@ export function processGroupSpec(groupKey, groupSpec) { const processToken = makeProcessToken(aggregate); + groupSpec.key = groupKey; + processToken(groupSpec, 'prefix', processStringToken); processToken(groupSpec, 'paths', processObjectToken); diff --git a/src/urls.js b/src/urls.js index 71173f7f..faa58237 100644 --- a/src/urls.js +++ b/src/urls.js @@ -48,8 +48,20 @@ export function generateURLs(urlSpec) { const generateTo = (fromPath, fromGroup) => { const A = trimLeadingSlash(fromPath); - const rebasePrefix = '../' - .repeat((fromGroup.prefix || '').split('/').filter(Boolean).length); + const fromPrefix = fromGroup.prefix || ''; + + const rebasePrefix = + '../'.repeat(fromPrefix.split('/').filter(Boolean).length); + + const originOfPrefix = prefix => { + try { + return new URL(prefix).origin; + } catch { + return null; + } + }; + + const fromOrigin = originOfPrefix(fromPrefix); const pathHelper = (toPath, toGroup) => { let B = trimLeadingSlash(toPath); @@ -57,40 +69,106 @@ export function generateURLs(urlSpec) { let argIndex = 0; B = B.replaceAll('<>', () => `<${argIndex++}>`); - if (toGroup.prefix !== fromGroup.prefix) { - // TODO: Handle differing domains in prefixes. - B = rebasePrefix + (toGroup.prefix || '') + B; - } - const suffix = toPath.endsWith('/') ? '/' : ''; - return { - posix: path.posix.relative(A, B) + suffix, - device: path.relative(A, B) + suffix, - }; - }; + const toPrefix = toGroup.prefix; + + if (toPrefix !== fromPrefix) { + // Compare origins. Note that originOfPrefix() can + // be null for both prefixes. + const toOrigin = originOfPrefix(toPrefix); + if (fromOrigin === toOrigin) { + // Go to the root, add the to-group's prefix, then + // continue with normal path.relative() behavior. + B = rebasePrefix + (toGroup.prefix || '') + B; + } else { + // Crossing origins never conceptually represents + // something you can interpret on-`.device()`. + return { + posix: toGroup.prefix + B + suffix, + device: null, + }; + } + } - const groupSymbol = Symbol(); + // If we're coming from a qualified origin (domain), + // then at this point, A and B represent paths on the + // same origin. We can use normal path.relative() behavior. + if (fromOrigin) { + // If we're working on an origin, there's no meaning to + // a `.device()`-local relative path. + return { + posix: path.posix.relative(A, B) + suffix, + device: null, + }; + } else { + return { + posix: path.posix.relative(A, B) + suffix, + device: path.relative(A, B) + suffix, + }; + } + }; - const groupHelper = (urlGroup) => ({ - [groupSymbol]: urlGroup, - ...withEntries(urlGroup.paths, (entries) => - entries.map(([key, path]) => [key, pathHelper(path, urlGroup)]) - ), - }); + const groupHelper = urlGroup => + withEntries(urlGroup.paths, entries => + entries.map(([key, path]) => [ + key, + pathHelper(path, urlGroup), + ])); - const relative = withEntries(urlSpec, (entries) => - entries.map(([key, urlGroup]) => [key, groupHelper(urlGroup)]) - ); + const relative = + withEntries(urlSpec, entries => + entries.map(([key, urlGroup]) => [ + key, + groupHelper(urlGroup), + ])); const toHelper = ({device}) => (key, ...args) => { - const { - value: { - [device ? 'device' : 'posix']: template, - }, - } = getValueForFullKey(relative, key); + const templateKey = (device ? 'device' : 'posix'); + + const {value: {[templateKey]: template}} = + getValueForFullKey(relative, key); + + // If we got past getValueForFullKey(), we've already ruled out + // the common errors, i.e. incorrectly formatted key or invalid + // group key or subkey. + if (template === null) { + // Self-diagnose, brutally. + + const otherTemplateKey = (device ? 'posix' : 'device'); + + const {value: {[templateKey]: otherTemplate}} = + getValueForFullKey(relative, key); + + const effectiveMode = + (otherTemplate + ? `${templateKey} mode` + : `either mode`); + + const toGroupKey = key.split('.')[0]; + + const anyOthers = + Object.values(relative[toGroupKey]) + .find(templates => + (otherTemplate + ? templates[templateKey] + : templates.posix || templates.device)); + + const effectiveTo = + (anyOthers + ? key + : `${toGroupKey}.*`); + + if (anyOthers) { + console.log(relative[toGroupKey]); + } + + throw new Error( + `from(${fromGroup.key}.*).to(${effectiveTo}) ` + + `not available in ${effectiveMode} with this url spec`); + } let missing = 0; let result = template.replaceAll(/<([0-9]+)>/g, (match, n) => { @@ -110,19 +188,31 @@ export function generateURLs(urlSpec) { if (missing) { throw new Error( - `Expected ${missing + args.length} arguments, got ${ - args.length - } (key ${key}, args [${args}])` - ); + `Expected ${missing + args.length} arguments, ` + + `got ${args.length} (key ${key}, args [${args}])`); } return result; }; - return { - to: toHelper({device: false}), - toDevice: toHelper({device: true}), - }; + const toAvailableHelper = + ({device}) => + (key) => { + const templateKey = (device ? 'device' : 'posix'); + + const {value: {[templateKey]: template}} = + getValueForFullKey(relative, key); + + return !!template; + }; + + const to = toHelper({device: false}); + const toDevice = toHelper({device: true}); + + to.available = toAvailableHelper({device: false}); + toDevice.available = toAvailableHelper({device: true}); + + return {to, toDevice}; }; const generateFrom = () => { |