Merge front end repo

3 files changed, 56 insertions, 0 deletions

diff --git a/Timeline/ClientApp/src/app/utilities/rxjs.ts b/Timeline/ClientApp/src/app/utilities/rxjs.ts
new file mode 100644
index 00000000..1be49164
--- /dev/null
+++ b/Timeline/ClientApp/src/app/utilities/rxjs.ts
@@ -0,0 +1,14 @@
+import { OperatorFunction } from 'rxjs';

+import { catchError } from 'rxjs/operators';

+

+export function convertError<T, NewError>(

+  oldErrorType: { new (...args: never[]): unknown },

+  newErrorType: { new (): NewError }

+): OperatorFunction<T, T> {

+  return catchError((error) => {

+    if (error instanceof oldErrorType) {

+      throw new newErrorType();

+    }

+    throw error;

+  });

+}

diff --git a/Timeline/ClientApp/src/app/utilities/type.ts b/Timeline/ClientApp/src/app/utilities/type.ts
new file mode 100644
index 00000000..307e5825
--- /dev/null
+++ b/Timeline/ClientApp/src/app/utilities/type.ts
@@ -0,0 +1 @@
+export type ExcludeKey<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;

diff --git a/Timeline/ClientApp/src/app/utilities/url.ts b/Timeline/ClientApp/src/app/utilities/url.ts
new file mode 100644
index 00000000..0b8623a2
--- /dev/null
+++ b/Timeline/ClientApp/src/app/utilities/url.ts
@@ -0,0 +1,41 @@
+//copied from https://stackoverflow.com/questions/5999118/how-can-i-add-or-update-a-query-string-parameter

+export function updateQueryString(

+  key: string,

+  value: undefined | string | null,

+  url: string

+): string {

+  const re = new RegExp('([?&])' + key + '=.*?(&|#|$)(.*)', 'gi');

+  let hash;

+

+  if (re.test(url)) {

+    if (typeof value !== 'undefined' && value !== null) {

+      return url.replace(re, '$1' + key + '=' + value + '$2$3');

+    } else {

+      hash = url.split('#');

+      url = hash[0].replace(re, '$1$3').replace(/(&|\?)$/, '');

+      if (typeof hash[1] !== 'undefined' && hash[1] !== null) {

+        url += '#' + hash[1];

+      }

+      return url;

+    }

+  } else {

+    if (typeof value !== 'undefined' && value !== null) {

+      const separator = url.includes('?') ? '&' : '?';

+      hash = url.split('#');

+      url = hash[0] + separator + key + '=' + value;

+      if (typeof hash[1] !== 'undefined' && hash[1] !== null) {

+        url += '#' + hash[1];

+      }

+      return url;

+    } else {

+      return url;

+    }

+  }

+}

+

+export function applyQueryParameters<T>(url: string, query: T): string {

+  for (const [key, value] of Object.entries(query)) {

+    url = updateQueryString(key, String(value), url);

+  }

+  return url;

+}