From c4d4dbafc5ff35ef1a9925acfd51e020309712a2 Mon Sep 17 00:00:00 2001
From: Alex Reed <alexreed1192@gmail.com>
Date: Wed, 19 Feb 2020 19:33:39 -0800
Subject: [PATCH] Add JavaScript Custom Functions

---
 .../office-api-excel/Custom Functions.ts      | 188 ++++++++++++++++++
 1 file changed, 188 insertions(+)
 create mode 100644 javascript/office-api-excel/Custom Functions.ts

diff --git a/javascript/office-api-excel/Custom Functions.ts b/javascript/office-api-excel/Custom Functions.ts
new file mode 100644
index 0000000..61405bb
--- /dev/null
+++ b/javascript/office-api-excel/Custom Functions.ts	
@@ -0,0 +1,188 @@
+/**
+ * Calculates the sum of the specified numbers
+ * @customfunction
+ * @param first First number.
+ * @param second Second number.
+ * @returns The sum of the numbers.
+*/
+
+function addTwo(first: number, second: number): number {
+    return first + second;
+}
+
+/**
+ * Gets the star count for a given Github repository.
+ * @customfunction
+ * @param {string} userName string name of Github user or organization.
+ * @param {string} repoName string name of the Github repository.
+ * @return {number} number of stars given to a Github repository.
+*/
+
+async function getStarCount(userName: string, repoName:string) {
+    try {
+        //You can change this URL to any web request you want to work with.
+        const url = "https://api.github.com/repos/" + userName + "/" + repoName;
+        const response = await fetch(url);
+
+        //Expect that status code is in 200-299 range
+        if (!response.ok) {
+            throw new Error(response.statusText);
+        }
+
+        const jsonResponse = await response.json();
+        return jsonResponse.watchers_count;
+    } catch (error) {
+        return error;
+    }
+}
+
+/**
+ * Returns the current time
+ * @returns {string} String with the current time formatted for the current locale.
+*/
+
+function currentTime() {
+    return new Date().toLocaleTimeString();
+}
+
+/**
+ * Displays the current time once a second
+ * @customfunction
+ * @param {CustomFunctions.StreamingInvocation<string>} invocation Custom function invocation
+*/
+
+function clock(invocation) {
+    const timer = setInterval(() => {
+        const time = currentTime();
+        invocation.setResult(time);
+    }, 1000);
+
+    invocation.onCanceled = () => {
+        clearInterval(timer);
+    };
+}
+
+/**
+ * Calculates the sum of the specified numbers
+ * @customfunction
+ * @param first First number.
+ * @param second Second number.
+ * @param [third] Third number to add. If omitted, third = 0.
+ * @returns The sum of the numbers.
+*/
+
+function addOpt(first: number, second: number, third?: number): number {
+    if (third === null) {
+        third = 0;
+    }
+    return first + second + third;
+}
+
+/**
+ * Returns the second highest value in a matrixed range of values.
+ * @customfunction
+ * @param {number[][]} values Multiple ranges of values.
+ * @param {number[][]} values2 Multiple ranges of values.
+*/
+
+function secondHighest(values, values2) {
+    let highest = values[0][0],
+        secondHighest = values[0][0];
+    for (var i = 0; i < values.length; i++) {
+        for (var j = 0; j < values[i].length; j++) {
+            if (values[i][j] >= highest) {
+                secondHighest = highest;
+                highest = values[i][j];
+            } else if (values[i][j] >= secondHighest) {
+                secondHighest = values[i][j];
+            }
+        }
+    }
+    return secondHighest;
+}
+
+/**
+ * The sum of all of the numbers.
+ * @customfunction
+ * @param operands A number (such as 1 or 3.1415), a cell address (such as A1 or $E$11), or a range of cell addresses (such as B3:F12)
+*/
+
+function AddRepeating(operands: number[][][]): number {
+    let total: number = 0;
+
+    operands.forEach((range) => {
+        range.forEach((row) => {
+            row.forEach((num) => {
+                total += num;
+            });
+        });
+    });
+
+    return total;
+}
+
+/**
+ * Function that gets the address of a cell.
+ * @customfunction
+ * @param {CustomFunctions.Invocation} invocation Uses the invocation parameter present in each cell.
+ * @requiresFont
+ * @returns {string} Returns address of cell.
+*/
+
+function getAddress(invocation) {
+    return invocation.address;
+}
+
+/**
+ * Get text values that spill down.
+ * @customfunction
+ * @returns {string[][]} A dynamic array with multiple results.
+*/
+
+function spillDown() {
+    return [["first"], ["second"], ["third"]];
+}
+
+/**
+ * Get text values that spill to the right.
+ * @customfunction
+ * @returns {string[][]} A dynamic array with multiple results.
+*/
+
+function spillRight() {
+    return [["first", "second", "third"]];
+}
+
+/**
+ * Get text values that spill both right and down.
+ * @customfunction
+ * @returns {string[][]} A dynamic array with multiple results.
+*/
+
+function spillRectangle() {
+    return [["apples", 1, "pounds"], ["oranges", 3, "pounds"], ["pears", 5, "crates"]];
+}
+
+/** @CustomFunction
+   * @retreives a stock prive for a given symbol
+   * @param {string} stock_symbol - The ticker symbol of the stock.
+   * @returns A stock price.
+*/
+
+async function getStockPrice(stock_symbol: string) {
+    try {
+        //You can change this URL to any web request you want to work with.
+        const url = "https://api.iextrading.com/1.0/tops/last?symbols=" + stock_symbol;
+        const response = await fetch(url);
+
+        //Expect that status code is in 200-299 range
+        if (!response.ok) {
+            throw new Error(response.statusText);
+        }
+
+        const jsonResponse = await response.json();
+        return jsonResponse[0].price;
+    } catch (error) {
+        return error;
+    }
+}