init

node_modules/fast-safe-stringify/index.js

@@ -0,0 +1,176 @@
+module.exports = stringify
+stringify.default = stringify
+stringify.stable = deterministicStringify
+stringify.stableStringify = deterministicStringify
+
+var arr = []
+var replacerStack = []
+
+// Regular stringify
+function stringify (obj, replacer, spacer) {
+  decirc(obj, '', [], undefined)
+  var res
+  try {
+    if (replacerStack.length === 0) {
+      res = JSON.stringify(obj, replacer, spacer)
+    } else {
+      res = JSON.stringify(obj, replaceGetterValues(replacer), spacer)
+    }
+  } catch (_) {
+    return JSON.stringify('[unable to serialize, circular reference is too complex to analyze]')
+  } finally {
+    while (arr.length !== 0) {
+      var part = arr.pop()
+      if (part.length === 4) {
+        Object.defineProperty(part[0], part[1], part[3])
+      } else {
+        part[0][part[1]] = part[2]
+      }
+    }
+  }
+  return res
+}
+function decirc (val, k, stack, parent) {
+  var i
+  if (typeof val === 'object' && val !== null) {
+    for (i = 0; i < stack.length; i++) {
+      if (stack[i] === val) {
+        var propertyDescriptor = Object.getOwnPropertyDescriptor(parent, k)
+        if (propertyDescriptor.get !== undefined) {
+          if (propertyDescriptor.configurable) {
+            Object.defineProperty(parent, k, { value: '[Circular]' })
+            arr.push([parent, k, val, propertyDescriptor])
+          } else {
+            replacerStack.push([val, k])
+          }
+        } else {
+          parent[k] = '[Circular]'
+          arr.push([parent, k, val])
+        }
+        return
+      }
+    }
+    stack.push(val)
+    // Optimize for Arrays. Big arrays could kill the performance otherwise!
+    if (Array.isArray(val)) {
+      for (i = 0; i < val.length; i++) {
+        decirc(val[i], i, stack, val)
+      }
+    } else {
+      var keys = Object.keys(val)
+      for (i = 0; i < keys.length; i++) {
+        var key = keys[i]
+        decirc(val[key], key, stack, val)
+      }
+    }
+    stack.pop()
+  }
+}
+
+// Stable-stringify
+function compareFunction (a, b) {
+  if (a < b) {
+    return -1
+  }
+  if (a > b) {
+    return 1
+  }
+  return 0
+}
+
+function deterministicStringify (obj, replacer, spacer) {
+  var tmp = deterministicDecirc(obj, '', [], undefined) || obj
+  var res
+  try {
+    if (replacerStack.length === 0) {
+      res = JSON.stringify(tmp, replacer, spacer)
+    } else {
+      res = JSON.stringify(tmp, replaceGetterValues(replacer), spacer)
+    }
+  } catch (_) {
+    return JSON.stringify('[unable to serialize, circular reference is too complex to analyze]')
+  } finally {
+    // Ensure that we restore the object as it was.
+    while (arr.length !== 0) {
+      var part = arr.pop()
+      if (part.length === 4) {
+        Object.defineProperty(part[0], part[1], part[3])
+      } else {
+        part[0][part[1]] = part[2]
+      }
+    }
+  }
+  return res
+}
+
+function deterministicDecirc (val, k, stack, parent) {
+  var i
+  if (typeof val === 'object' && val !== null) {
+    for (i = 0; i < stack.length; i++) {
+      if (stack[i] === val) {
+        var propertyDescriptor = Object.getOwnPropertyDescriptor(parent, k)
+        if (propertyDescriptor.get !== undefined) {
+          if (propertyDescriptor.configurable) {
+            Object.defineProperty(parent, k, { value: '[Circular]' })
+            arr.push([parent, k, val, propertyDescriptor])
+          } else {
+            replacerStack.push([val, k])
+          }
+        } else {
+          parent[k] = '[Circular]'
+          arr.push([parent, k, val])
+        }
+        return
+      }
+    }
+    try {
+      if (typeof val.toJSON === 'function') {
+        return
+      }
+    } catch (_) {
+      return
+    }
+    stack.push(val)
+    // Optimize for Arrays. Big arrays could kill the performance otherwise!
+    if (Array.isArray(val)) {
+      for (i = 0; i < val.length; i++) {
+        deterministicDecirc(val[i], i, stack, val)
+      }
+    } else {
+      // Create a temporary object in the required way
+      var tmp = {}
+      var keys = Object.keys(val).sort(compareFunction)
+      for (i = 0; i < keys.length; i++) {
+        var key = keys[i]
+        deterministicDecirc(val[key], key, stack, val)
+        tmp[key] = val[key]
+      }
+      if (parent !== undefined) {
+        arr.push([parent, k, val])
+        parent[k] = tmp
+      } else {
+        return tmp
+      }
+    }
+    stack.pop()
+  }
+}
+
+// wraps replacer function to handle values we couldn't replace
+// and mark them as [Circular]
+function replaceGetterValues (replacer) {
+  replacer = replacer !== undefined ? replacer : function (k, v) { return v }
+  return function (key, val) {
+    if (replacerStack.length > 0) {
+      for (var i = 0; i < replacerStack.length; i++) {
+        var part = replacerStack[i]
+        if (part[1] === key && part[0] === val) {
+          val = '[Circular]'
+          replacerStack.splice(i, 1)
+          break
+        }
+      }
+    }
+    return replacer.call(this, key, val)
+  }
+}