1 files changed, 143 insertions, 0 deletions
diff --git a/node_modules/@jet/environment/json/reader/key-path.js b/node_modules/@jet/environment/json/reader/key-path.js
new file mode 100644
index 0000000..1bb25ff
--- /dev/null
+++ b/node_modules/@jet/environment/json/reader/key-path.js
@@ -0,0 +1,143 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.keyPathContains = exports.keyPathEndsWith = exports.keyPathStartsWith = exports.keyPathsEqual = exports.isKeyPathThis = exports.thisKeyPath = exports.keysOf = void 0;
+const optional_1 = require("../../types/optional");
+/**
+ * A global cache containing parsed string key paths
+ * with components separated by a dot.
+ */
+const parsedKeyPaths = {};
+/**
+ * Extract the individual keys from a key path in order
+ * to traverse into an object to access a specific value.
+ *
+ * @param keyPath - A key path to extract the keys from.
+ * @returns An array containing the keys making up `keyPath`.
+ */
+function keysOf(keyPath) {
+    // TODO: Normalizing into an array is potentially a bottleneck.
+    //       Do we want to do this differently for slower environments?
+    if (Array.isArray(keyPath)) {
+        return keyPath;
+    }
+    else {
+        switch (typeof keyPath) {
+            case "string": {
+                const existingKeyPath = parsedKeyPaths[keyPath];
+                if ((0, optional_1.isSome)(existingKeyPath)) {
+                    return existingKeyPath;
+                }
+                else {
+                    const newKeyPath = Object.freeze(keyPath.split("."));
+                    parsedKeyPaths[keyPath] = newKeyPath;
+                    return newKeyPath;
+                }
+            }
+            case "number": {
+                return [keyPath];
+            }
+            case "symbol": {
+                return [keyPath];
+            }
+            default: {
+                throw new TypeError(`${keyPath.toString()} is not a KeyPath`);
+            }
+        }
+    }
+}
+exports.keysOf = keysOf;
+/**
+ * A key path representing an object itself.
+ */
+exports.thisKeyPath = Object.freeze([]);
+/**
+ * Determine whether a given key path is the `this` (identity) key path.
+ * @param keyPath - A key path to test.
+ */
+function isKeyPathThis(keyPath) {
+    return Array.isArray(keyPath) && keyPath.length === 0;
+}
+exports.isKeyPathThis = isKeyPathThis;
+/**
+ * Determines whether two key paths are equivalent taking into account
+ * that the key paths may have different representations.
+ *
+ * @param lhs - A key path to compare.
+ * @param rhs - Another key path to compare.
+ */
+function keyPathsEqual(lhs, rhs) {
+    // 1. Are the key paths equal through value semantics?
+    if (lhs === rhs) {
+        return true;
+    }
+    const lhsKeys = keysOf(lhs);
+    const rhsKeys = keysOf(rhs);
+    // 2. Do we have the same number of keys in each path?
+    if (lhsKeys.length !== rhsKeys.length) {
+        return false;
+    }
+    // 3. Do any of the keys in our paths differ?
+    for (let index = 0, length = lhsKeys.length; index < length; index += 1) {
+        if (lhsKeys[index] !== rhsKeys[index]) {
+            return false;
+        }
+    }
+    // 4. We have passed all checks and are considered equal.
+    return true;
+}
+exports.keyPathsEqual = keyPathsEqual;
+/**
+ * Determine whether a given key path starts with a specified key.
+ *
+ * @param haystack - A key path to perform a prefix check on.
+ * @param needle - The key to check for.
+ */
+function keyPathStartsWith(haystack, needle) {
+    if (haystack === needle) {
+        return true;
+    }
+    else {
+        const keys = keysOf(haystack);
+        if (keys.length === 0) {
+            return false;
+        }
+        return keys[0] === needle;
+    }
+}
+exports.keyPathStartsWith = keyPathStartsWith;
+/**
+ * Determine whether a given key path ends with a specified key.
+ *
+ * @param haystack - A key path to perform a suffix check on.
+ * @param needle - The key to check for.
+ */
+function keyPathEndsWith(haystack, needle) {
+    if (haystack === needle) {
+        return true;
+    }
+    else {
+        const keys = keysOf(haystack);
+        if (keys.length === 0) {
+            return false;
+        }
+        return keys[keys.length - 1] === needle;
+    }
+}
+exports.keyPathEndsWith = keyPathEndsWith;
+/**
+ * Determine whether a given key path contains a specified key.
+ *
+ * @param haystack - A key path to search.
+ * @param needle - The key to search for.
+ */
+function keyPathContains(haystack, needle) {
+    if (haystack === needle) {
+        return true;
+    }
+    else {
+        const keys = keysOf(haystack);
+        return keys.includes(needle);
+    }
+}
+exports.keyPathContains = keyPathContains;
+//# sourceMappingURL=key-path.js.map
+\ No newline at end of file