cesnimda
108 lines
4.3 KiB
C#
108 lines
4.3 KiB
C#
using System.Text;
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using System.Text.RegularExpressions;
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using JobTrackerApi.Models;
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using Microsoft.AspNetCore.Authorization;
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using Microsoft.AspNetCore.Identity;
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using Microsoft.AspNetCore.Mvc;
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namespace JobTrackerApi.Controllers;
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[ApiController]
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[Route("api/profile-cv")]
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[Authorize(AuthenticationSchemes = "local")]
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public sealed class ProfileCvController : ControllerBase
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{
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private static readonly HashSet<string> AllowedExtensions = new(StringComparer.OrdinalIgnoreCase)
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{
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".txt",
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".md",
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".pdf",
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".docx",
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};
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private const long MaxFileSizeBytes = 5 * 1024 * 1024;
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private readonly UserManager<ApplicationUser> _users;
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public ProfileCvController(UserManager<ApplicationUser> users)
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{
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_users = users;
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}
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[HttpPost("upload")]
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[RequestSizeLimit(MaxFileSizeBytes)]
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public async Task<IActionResult> Upload([FromForm] IFormFile file)
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{
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var user = await _users.GetUserAsync(User);
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if (user is null) return Unauthorized();
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if (file is null || file.Length == 0) return BadRequest("Select a CV file to upload.");
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if (file.Length > MaxFileSizeBytes) return BadRequest("CV import file is too large. Keep it under 5 MB.");
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var extension = Path.GetExtension(file.FileName ?? string.Empty);
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if (!AllowedExtensions.Contains(extension))
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{
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return BadRequest("Only .txt, .md, .pdf, and .docx CV imports are supported right now.");
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}
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var text = (await ExtractTextAsync(file, extension)).Trim();
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if (string.IsNullOrWhiteSpace(text))
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{
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return BadRequest("The uploaded CV file could not be read or was empty.");
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}
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user.ProfileCvText = text;
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var result = await _users.UpdateAsync(user);
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if (!result.Succeeded)
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{
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return BadRequest(string.Join("; ", result.Errors.Select(e => e.Description)));
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}
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return Ok(new { imported = true, characters = text.Length });
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}
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private static async Task<string> ExtractTextAsync(IFormFile file, string extension)
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{
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if (string.Equals(extension, ".txt", StringComparison.OrdinalIgnoreCase) || string.Equals(extension, ".md", StringComparison.OrdinalIgnoreCase))
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{
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using var stream = file.OpenReadStream();
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using var reader = new StreamReader(stream, Encoding.UTF8, detectEncodingFromByteOrderMarks: true);
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return (await reader.ReadToEndAsync()).Trim();
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}
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await using var memory = new MemoryStream();
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await file.CopyToAsync(memory);
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var bytes = memory.ToArray();
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if (string.Equals(extension, ".pdf", StringComparison.OrdinalIgnoreCase))
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{
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var raw = Encoding.UTF8.GetString(bytes);
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var textMatches = Regex.Matches(raw, @"\((.*?)\)Tj", RegexOptions.Singleline)
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.Select(match => match.Groups[1].Value)
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.Concat(Regex.Matches(raw, @"\[(.*?)\]TJ", RegexOptions.Singleline)
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.SelectMany(match => Regex.Matches(match.Groups[1].Value, @"\((.*?)\)", RegexOptions.Singleline).Select(x => x.Groups[1].Value)))
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.Where(value => !string.IsNullOrWhiteSpace(value))
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.Select(value => Regex.Unescape(value))
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.ToList();
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var joined = textMatches.Count > 0 ? string.Join(" ", textMatches) : raw;
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var scrubbed = Regex.Replace(joined, @"[\x00-\x08\x0B\x0C\x0E-\x1F]", " ");
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return Regex.Replace(scrubbed, @"\s+", " ").Trim();
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}
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if (string.Equals(extension, ".docx", StringComparison.OrdinalIgnoreCase))
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{
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using var archive = new System.IO.Compression.ZipArchive(new MemoryStream(bytes), System.IO.Compression.ZipArchiveMode.Read, leaveOpen: false);
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var entry = archive.GetEntry("word/document.xml");
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if (entry is null) return string.Empty;
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using var entryStream = entry.Open();
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using var reader = new StreamReader(entryStream, Encoding.UTF8);
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var xml = await reader.ReadToEndAsync();
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var withoutTags = Regex.Replace(xml, "<[^>]+>", " ");
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var decoded = System.Net.WebUtility.HtmlDecode(withoutTags) ?? string.Empty;
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return Regex.Replace(decoded, @"\s+", " ").Trim();
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}
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return string.Empty;
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}
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}
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