1 files changed, 141 insertions, 0 deletions
diff --git a/backend/node_modules/semver/classes/comparator.js b/backend/node_modules/semver/classes/comparator.js
new file mode 100644
index 0000000..3d39c0e
--- /dev/null
+++ b/backend/node_modules/semver/classes/comparator.js
@@ -0,0 +1,141 @@
+const ANY = Symbol('SemVer ANY')
+// hoisted class for cyclic dependency
+class Comparator {
+  static get ANY () {
+    return ANY
+  }
+
+  constructor (comp, options) {
+    options = parseOptions(options)
+
+    if (comp instanceof Comparator) {
+      if (comp.loose === !!options.loose) {
+        return comp
+      } else {
+        comp = comp.value
+      }
+    }
+
+    comp = comp.trim().split(/\s+/).join(' ')
+    debug('comparator', comp, options)
+    this.options = options
+    this.loose = !!options.loose
+    this.parse(comp)
+
+    if (this.semver === ANY) {
+      this.value = ''
+    } else {
+      this.value = this.operator + this.semver.version
+    }
+
+    debug('comp', this)
+  }
+
+  parse (comp) {
+    const r = this.options.loose ? re[t.COMPARATORLOOSE] : re[t.COMPARATOR]
+    const m = comp.match(r)
+
+    if (!m) {
+      throw new TypeError(`Invalid comparator: ${comp}`)
+    }
+
+    this.operator = m[1] !== undefined ? m[1] : ''
+    if (this.operator === '=') {
+      this.operator = ''
+    }
+
+    // if it literally is just '>' or '' then allow anything.
+    if (!m[2]) {
+      this.semver = ANY
+    } else {
+      this.semver = new SemVer(m[2], this.options.loose)
+    }
+  }
+
+  toString () {
+    return this.value
+  }
+
+  test (version) {
+    debug('Comparator.test', version, this.options.loose)
+
+    if (this.semver === ANY || version === ANY) {
+      return true
+    }
+
+    if (typeof version === 'string') {
+      try {
+        version = new SemVer(version, this.options)
+      } catch (er) {
+        return false
+      }
+    }
+
+    return cmp(version, this.operator, this.semver, this.options)
+  }
+
+  intersects (comp, options) {
+    if (!(comp instanceof Comparator)) {
+      throw new TypeError('a Comparator is required')
+    }
+
+    if (this.operator === '') {
+      if (this.value === '') {
+        return true
+      }
+      return new Range(comp.value, options).test(this.value)
+    } else if (comp.operator === '') {
+      if (comp.value === '') {
+        return true
+      }
+      return new Range(this.value, options).test(comp.semver)
+    }
+
+    options = parseOptions(options)
+
+    // Special cases where nothing can possibly be lower
+    if (options.includePrerelease &&
+      (this.value === '<0.0.0-0' || comp.value === '<0.0.0-0')) {
+      return false
+    }
+    if (!options.includePrerelease &&
+      (this.value.startsWith('<0.0.0') || comp.value.startsWith('<0.0.0'))) {
+      return false
+    }
+
+    // Same direction increasing (> or >=)
+    if (this.operator.startsWith('>') && comp.operator.startsWith('>')) {
+      return true
+    }
+    // Same direction decreasing (< or <=)
+    if (this.operator.startsWith('<') && comp.operator.startsWith('<')) {
+      return true
+    }
+    // same SemVer and both sides are inclusive (<= or >=)
+    if (
+      (this.semver.version === comp.semver.version) &&
+      this.operator.includes('=') && comp.operator.includes('=')) {
+      return true
+    }
+    // opposite directions less than
+    if (cmp(this.semver, '<', comp.semver, options) &&
+      this.operator.startsWith('>') && comp.operator.startsWith('<')) {
+      return true
+    }
+    // opposite directions greater than
+    if (cmp(this.semver, '>', comp.semver, options) &&
+      this.operator.startsWith('<') && comp.operator.startsWith('>')) {
+      return true
+    }
+    return false
+  }
+}
+
+module.exports = Comparator
+
+const parseOptions = require('../internal/parse-options')
+const { safeRe: re, t } = require('../internal/re')
+const cmp = require('../functions/cmp')
+const debug = require('../internal/debug')
+const SemVer = require('./semver')
+const Range = require('./range')