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backend/node_modules/@fastify/swagger/lib/mode/static.js

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+'use strict'
+
+const path = require('node:path')
+const fs = require('node:fs')
+const yaml = require('yaml')
+
+module.exports = function (fastify, opts, done) {
+  if (!opts.specification) return done(new Error('specification is missing in the module options'))
+  if (typeof opts.specification !== 'object') return done(new Error('specification is not an object'))
+
+  let swaggerObject = {}
+
+  if (!opts.specification.path && !opts.specification.document) {
+    return done(new Error('both specification.path and specification.document are missing, should be path to the file or swagger document spec'))
+  } else if (opts.specification.path) {
+    if (typeof opts.specification.path !== 'string') return done(new Error('specification.path is not a string'))
+
+    if (!fs.existsSync(path.resolve(opts.specification.path))) return done(new Error(`${opts.specification.path} does not exist`))
+
+    const extName = path.extname(opts.specification.path).toLowerCase()
+    if (['.yaml', '.json'].indexOf(extName) === -1) return done(new Error("specification.path extension name is not supported, should be one from ['.yaml', '.json']"))
+
+    if (opts.specification.postProcessor && typeof opts.specification.postProcessor !== 'function') return done(new Error('specification.postProcessor should be a function'))
+
+    if (opts.specification.baseDir && typeof opts.specification.baseDir !== 'string') return done(new Error('specification.baseDir should be string'))
+
+    if (!opts.specification.baseDir) {
+      opts.specification.baseDir = path.resolve(path.dirname(opts.specification.path))
+    } else {
+      while (opts.specification.baseDir.endsWith('/')) {
+        opts.specification.baseDir = opts.specification.baseDir.slice(0, -1)
+      }
+    }
+
+    // read
+    const source = fs.readFileSync(
+      path.resolve(opts.specification.path),
+      'utf8'
+    )
+    switch (extName) {
+      case '.yaml':
+        swaggerObject = yaml.parse(source)
+        break
+      case '.json':
+        swaggerObject = JSON.parse(source)
+        break
+    }
+
+    // apply postProcessor, if one was passed as an argument
+    if (opts.specification.postProcessor) {
+      swaggerObject = opts.specification.postProcessor(swaggerObject)
+    }
+  } else {
+    if (typeof opts.specification.document !== 'object') return done(new Error('specification.document is not an object'))
+
+    swaggerObject = opts.specification.document
+  }
+
+  fastify.decorate(opts.decorator || 'swagger', swagger)
+
+  const cache = {
+    swaggerObject: null,
+    swaggerString: null
+  }
+
+  function swagger (opts) {
+    if (opts?.yaml) {
+      if (cache.swaggerString) return cache.swaggerString
+    } else {
+      if (cache.swaggerObject) return cache.swaggerObject
+    }
+
+    if (opts?.yaml) {
+      const swaggerString = yaml.stringify(swaggerObject, { strict: false })
+      cache.swaggerString = swaggerString
+      return swaggerString
+    }
+
+    cache.swaggerObject = swaggerObject
+    return swaggerObject
+  }
+
+  done()
+}