Get-BloggerPost supports -Format Markdown (#20)

* Get-BloggerPost supports -Format JSON

* updated tests and readme

* fixed indentation for tests

Author: bryanbcook

README.md

@@ -64,9 +64,12 @@ A PowerShell library for publishing markdown files authored in markdown to Blogg
 
    When using `Markdown` format, files are saved as `<title>.md`
 
+   When using `JSON` format, files are saved as `<postid>.json`
+
    ```
    Get-BloggerPost -PostId <postid> -Format HTML
    Get-BloggerPost -PostId <postid> -Format Markdown
+   Get-BloggerPost -PostId <postid> -Format JSON
    ```
 
    You can specify an output directory where the file will be saved.

src/public/Get-BloggerPost.ps1

@@ -9,7 +9,7 @@
   The ID of the post to retrieve. This parameter is required.
 
 .PARAMETER Format
-  The format of the post content to retrieve. Use either Markdown or HTML.
+  The format of the post content to retrieve. Use either Markdown, JSON or HTML.
 
 .PARAMETER FolderDateFormat
   The folder name as expressed in a DateTime format string. For example, "YYYY/MM" which will save files
@@ -39,7 +39,7 @@ Function Get-BloggerPost {
     [string]$PostId,
 
     [Parameter(Mandatory, ParameterSetName = "Persist")]
-    [ValidateSet("HTML", "Markdown")]
+    [ValidateSet("HTML", "Markdown", "JSON")]
     [string]$Format,
 
     [Parameter(ParameterSetName ="Persist")]
@@ -122,6 +122,13 @@ Function Get-BloggerPost {
           Set-MarkdownFrontMatter -File $filePath -Replace $frontMatter
           Write-Verbose "Post content saved to: $filePath"
         }
+
+        "JSON" {
+          $fileName = "$PostId.json"
+          $filePath = Join-Path -Path $OutDirectory -ChildPath $fileName
+          $result | ConvertTo-Json | Out-File -FilePath $filePath -Encoding UTF8
+          Write-Verbose "Post content saved to: $filePath"
+        }
       }  
 
       # Return the post object for further processing if needed

src/tests/Get-BloggerPost.Tests.ps1

@@ -182,7 +182,7 @@ Describe "Get-BloggerPost" {
           return @{ 
             id = $postId
             title = "Test Post"
-            published = "10/01/2023 12:00:00"
+            published = [datetime]"2023-10-01T17:30:00-04:00"
             content = "<h1>Hello World</h1><p>This is a post.</p>" 
           }
         }
@@ -211,6 +211,51 @@ Describe "Get-BloggerPost" {
     }
   }
 
+  Context "As Json" {
+    BeforeEach {
+      InModuleScope PSBlogger {
+        # Mock the session to return a test blog ID
+        $BloggerSession.BlogId = "test-blog-id"
+
+        $postId = "123"
+
+        # mock post retrieval
+        Mock Invoke-GApi {
+          return @{ 
+            id = $postId
+            title = "Test Post"
+            published = [datetime]"2023-10-01T17:30:00-04:00"
+            content = "<h1>Hello World</h1><p>This is a post.</p>" 
+          }
+        }
+      }
+
+      $postId = "123"
+      $title = "Test Post"
+      $outFile = "TestDrive:\$postId.json"
+      
+    }
+
+    AfterEach {
+      if (Test-Path $outFile) {
+        Remove-Item $outFile -Force
+      }
+    }
+
+    It "Should write json response to file" {
+      
+      # act
+      Get-BloggerPost -PostId $postId -Format JSON -OutDirectory "TestDrive:\"
+
+      # assert
+      $jsonContent = Get-Content -Path $outFile -Raw | ConvertFrom-Json
+      $jsonContent.id | Should -Be "123"
+      $jsonContent.title | Should -Be "Test Post"
+      $jsonContent.content | Should -Not -BeNullOrEmpty
+      $jsonContent.published | Should -Not -BeNullOrEmpty
+    }
+  }
+
   Context "Using FolderDateFormat" {
 
     BeforeEach {
@@ -225,7 +270,7 @@ Describe "Get-BloggerPost" {
           return @{ 
             id = $postId
             title = "Test Post"
-            published = [datetime]"10/01/2023 12:00:00"
+            published = [datetime]"2023-10-01T17:30:00-04:00"
             content = "<h1>Hello World</h1><p>This is a post.</p>" 
           }
         }