Summarize the Last 15 File Dates and Counts

#---  FolderDayQty.ps1 ---
#  Summarize the Last 15 File Dates and Counts
#
#  This PowerShell searches the files in the passed folder and
#  groups the top 15 file dates sorted by date (decending),
#  the number of days ago it was from today, and
#  a count of the number of files on each date.
#
#  Example output:
#      Days    Media Date      Files
#      2       10/05/2024 Sat  97
#      3       10/04/2024 Fri  23
#      12      09/25/2024 Wed  20
#      13      09/24/2024 Tue  5
#      15      09/22/2024 Sun  40
#      16      09/21/2024 Sat  5
#      17      09/20/2024 Fri  39
#      18      09/19/2024 Thu  10
#      20      09/17/2024 Tue  1
#      22      09/15/2024 Sun  10
#      25      09/12/2024 Thu  6
#      27      09/10/2024 Tue  3
#      29      09/08/2024 Sun  4
#      31      09/06/2024 Fri  1
#      32      09/05/2024 Thu  5
#
#  This output is followed by a prompt in the calling batch file
#  asking the user how may days ago to include in the archive
#  process.  The Maxto M3 helmet camera is like a DVR so it
#  continuously records and deletes old files as space is needed.
#  The batch file copies recordings from the camera card to a hard
#  drive.  This output helps the user decide how far back the
#  archive should go.  If the user picks more days than necessary,
#  those days are still attempted to xcopy if they don't already
#  exist.  (It doesn't hurt anything but it wastes time.)  The
#  calling batch file will create an archive folder for each media
#  date so files are grouped by recording date.
#
#  Shared online:   https://pastebin.com/KwZQk3uh
#                   https://www.facebook.com/groups/maxtom3/posts/7992261460846946/
#  This is used by Archive_M3_MOVIE_EF.bat, https://pastebin.com/LT5XESs0
#  File generated with Phind.com AI
#  Configured by Ben Sacherich - 11/19/2023 - https://www.facebook.com/groups/maxtom3
#  BS 1/28/2024     Updated to sort dates as dates and not as strings.
#  BS 10/7/2024     Added day of week "ddd" to the output and updated comments.
#

param(
    [string]$SourceFolder = ""
)
# $SourceFolder = "F:\CARDV\PHOTO"

if (-not (Test-Path $SourceFolder -PathType Container)) {
    Write-Host "Source folder not found: $SourceFolder"
    exit 1
}

# Get all files in the source folder
$files = Get-ChildItem -Path $SourceFolder

# Create a hashtable to store counts based on date
$dateCounts = @{}

# Loop through each file
foreach ($file in $files) {
    # Get the date without the time
    $date = $file.LastWriteTime.Date
    # Write-Host $date

    # Check if the date is already in the hashtable
    if ($dateCounts.ContainsKey($date)) {
        # Increment the count for the date
        $dateCounts[$date]++
    } else {
        # Add the date to the hashtable with a count of 1
        $dateCounts[$date] = 1
    }
}

# Sort the hashtable by keys in descending order
$sortedDates = $dateCounts.GetEnumerator() | Sort-Object -Property Name -Descending

# Select the top 15 dates
$top5Dates = $sortedDates | Select-Object -First 15

# Display the counts for these dates and the number of days back they are from today
Write-Host "Days`tMedia Date`tFiles"
foreach ($date in $top5Dates) {
    $count = $dateCounts[$date.Name]
    $daysBack = (Get-Date).Subtract($date.Name).Days
    Write-Host "$daysBack`t$($date.Name.ToString('MM/dd/yyyy ddd'))`t$count"
}

exit