Add limit option to the app

src/cli.ts

@@ -14,11 +14,12 @@ program
     .option('-j, --json', 'Output as JSON')
     .option('-q, --query-metadata', 'Include query metadata in result')
     .option('-o <file>', 'Output to file')
-    .addOption(new Option('--sort <sort>', 'Sort by').default('hot').choices(['hot', 'new', 'top']));
+    .addOption(new Option('--sort <sort>', 'Sort by').default('hot').choices(['hot', 'new', 'top']))
+    .addOption(new Option('--limit <limit>', 'The amount of posts to fetch from the reddit api').default(100));
 
 program.parse();
 
 const options: ICliOptions = program.opts();
 
-randomBunny(options.subreddit, options.sort)
+randomBunny(options.subreddit, options.sort, options.limit)
     .then((response) => exit(CliHelper.Endpoint(response, options)));

src/constants/ErrorCode.ts

@@ -3,4 +3,5 @@ export enum ErrorCode {
     FailedToFetchReddit,
     UnableToParseJSON,
     NoImageResultsFound,
+    LimitOutOfRange,
 }

src/constants/ErrorMessages.ts

@@ -2,4 +2,5 @@ export default class ErrorMessages {
     public static readonly FailedToFetchReddit = "Failed to fetch result from Reddit";
     public static readonly UnableToParseJSON = "Unable to parse the JSON result";
     public static readonly NoImageResultsFound = "No image results found in response from Reddit";
+    public static readonly LimitOutOfRange = "Limit must be a number between 1 and 100";
 }

src/contracts/ICliOptions.ts

@@ -3,5 +3,6 @@ export default interface ICliOptions {
     json?: boolean,
     sort: "new" | "hot" | "top",
     o?: string,
+    limit: number,
     queryMetadata?: boolean,
 }

src/contracts/QueryResult.ts

@@ -1,4 +1,5 @@
 export default interface QueryResult {
     subreddit: string,
     sortBy: string,
+    limit: number,
 }

src/helpers/outputHelper.ts

@@ -24,6 +24,7 @@ export default class OutputHelper {
         if (options.queryMetadata != null) {
             outputLines.push(`Query.Subreddit = ${response.Query.subreddit}`);
             outputLines.push(`Query.Sort By = ${response.Query.sortBy}`);
+            outputLines.push(`Query.Limit = ${response.Query.limit}`);
         }
 
         return outputLines.join("\n");

src/index.ts

@@ -7,8 +7,23 @@ import { ErrorCode } from "./constants/ErrorCode";
 import ErrorMessages from "./constants/ErrorMessages";
 import ImageHelper from "./helpers/imageHelper";
 
-export default async function randomBunny(subreddit: string, sortBy: "new" | "hot" | "top" = 'hot'): Promise<IReturnResult> {
-    const result = await fetch(`https://reddit.com/r/${subreddit}/${sortBy}.json?limit=100`)
+export default async function randomBunny(subreddit: string, sortBy: "new" | "hot" | "top" = 'hot', limit: number = 100): Promise<IReturnResult> {
+    if (limit < 1 || limit > 100) {
+        return {
+            IsSuccess: false,
+            Query: {
+                subreddit: subreddit,
+                sortBy: sortBy,
+                limit: limit,
+            },
+            Error: {
+                Code: ErrorCode.LimitOutOfRange,
+                Message: ErrorMessages.LimitOutOfRange,
+            }
+        };
+    }
+
+    const result = await fetch(`https://reddit.com/r/${subreddit}/${sortBy}.json?limit=${limit}`)
         .then((res) => {
             return res;
         })
@@ -22,6 +37,7 @@ export default async function randomBunny(subreddit: string, sortBy: "new" | "ho
             Query: {
                 subreddit: subreddit,
                 sortBy: sortBy,
+                limit: limit,
             },
             Error: {
                 Code: ErrorCode.FailedToFetchReddit,
@@ -38,6 +54,7 @@ export default async function randomBunny(subreddit: string, sortBy: "new" | "ho
             Query: {
                 subreddit: subreddit,
                 sortBy: sortBy,
+                limit: limit,
             },
             Error: {
                 Code: ErrorCode.UnableToParseJSON,
@@ -60,6 +77,7 @@ export default async function randomBunny(subreddit: string, sortBy: "new" | "ho
             Query: {
                 subreddit: subreddit,
                 sortBy: sortBy,
+                limit: limit,
             },
             Error: {
                 Code: ErrorCode.NoImageResultsFound,
@@ -85,6 +103,7 @@ export default async function randomBunny(subreddit: string, sortBy: "new" | "ho
                 Query: {
                     subreddit: subreddit,
                     sortBy: sortBy,
+                    limit: limit,
                 },
                 Error: {
                     Code: ErrorCode.NoImageResultsFound,
@@ -115,6 +134,7 @@ export default async function randomBunny(subreddit: string, sortBy: "new" | "ho
         Query: {
             subreddit: subreddit,
             sortBy: sortBy,
+            limit: limit,
         },
         Result: redditResult
     };