veridian_kernel/services/
print.rs

1//! Print Spooler Service
2//!
3//! Manages print queues, jobs, and printer configurations. Supports virtual
4//! printers and IPP/1.1 protocol stubs for future network printing.
5
6#![allow(dead_code)]
7
8use alloc::{collections::BTreeMap, string::String, vec::Vec};
9
10// ---------------------------------------------------------------------------
11// Print job
12// ---------------------------------------------------------------------------
13
14/// Unique job identifier.
15pub type PrintJobId = u64;
16
17/// Status of a print job.
18#[derive(Debug, Clone, Copy, PartialEq, Eq)]
19pub enum PrintJobStatus {
20    /// Waiting in the queue.
21    Queued,
22    /// Currently being printed.
23    Printing,
24    /// Successfully completed.
25    Completed,
26    /// Failed with an error.
27    Failed,
28    /// Cancelled by the user.
29    Cancelled,
30}
31
32/// Paper size for printing.
33#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
34pub enum PaperSize {
35    /// US Letter (8.5 x 11 in).
36    #[default]
37    Letter,
38    /// ISO A4 (210 x 297 mm).
39    A4,
40    /// US Legal (8.5 x 14 in).
41    Legal,
42}
43
44impl PaperSize {
45    /// Width in points (1/72 inch).
46    pub fn width_pts(&self) -> u32 {
47        match self {
48            Self::Letter => 612,
49            Self::A4 => 595,
50            Self::Legal => 612,
51        }
52    }
53
54    /// Height in points (1/72 inch).
55    pub fn height_pts(&self) -> u32 {
56        match self {
57            Self::Letter => 792,
58            Self::A4 => 842,
59            Self::Legal => 1008,
60        }
61    }
62}
63
64/// A print job.
65#[derive(Debug, Clone)]
66pub struct PrintJob {
67    /// Unique identifier.
68    pub id: PrintJobId,
69    /// Name of the document being printed.
70    pub document_name: String,
71    /// Raw document data.
72    pub data: Vec<u8>,
73    /// Current status.
74    pub status: PrintJobStatus,
75    /// Number of copies requested.
76    pub copies: u32,
77    /// Total number of pages (0 = unknown).
78    pub pages: u32,
79    /// Page range start (1-based, 0 = all).
80    pub page_start: u32,
81    /// Page range end (0 = all).
82    pub page_end: u32,
83}
84
85impl PrintJob {
86    /// Create a new queued print job.
87    pub fn new(id: PrintJobId, document_name: &str, data: Vec<u8>) -> Self {
88        Self {
89            id,
90            document_name: String::from(document_name),
91            data,
92            status: PrintJobStatus::Queued,
93            copies: 1,
94            pages: 0,
95            page_start: 0,
96            page_end: 0,
97        }
98    }
99
100    /// Data size in bytes.
101    pub fn data_size(&self) -> usize {
102        self.data.len()
103    }
104}
105
106// ---------------------------------------------------------------------------
107// Print queue
108// ---------------------------------------------------------------------------
109
110/// A queue of print jobs for a single printer.
111#[derive(Debug)]
112pub struct PrintQueue {
113    /// Queued jobs (front = next to print).
114    jobs: Vec<PrintJob>,
115    /// Maximum number of jobs allowed in the queue.
116    max_jobs: usize,
117    /// Total number of jobs ever submitted.
118    total_submitted: u64,
119    /// Total number of jobs completed.
120    total_completed: u64,
121}
122
123impl PrintQueue {
124    /// Create a new queue with the given capacity.
125    pub fn new(max_jobs: usize) -> Self {
126        Self {
127            jobs: Vec::new(),
128            max_jobs,
129            total_submitted: 0,
130            total_completed: 0,
131        }
132    }
133
134    /// Enqueue a job. Returns false if the queue is full.
135    pub fn enqueue(&mut self, job: PrintJob) -> bool {
136        if self.jobs.len() >= self.max_jobs {
137            return false;
138        }
139        self.jobs.push(job);
140        self.total_submitted += 1;
141        true
142    }
143
144    /// Dequeue the next job (FIFO).
145    pub fn dequeue(&mut self) -> Option<PrintJob> {
146        if self.jobs.is_empty() {
147            None
148        } else {
149            let mut job = self.jobs.remove(0);
150            job.status = PrintJobStatus::Printing;
151            Some(job)
152        }
153    }
154
155    /// Cancel a job by ID. Returns true if found and cancelled.
156    pub fn cancel(&mut self, job_id: PrintJobId) -> bool {
157        for job in &mut self.jobs {
158            if job.id == job_id && job.status == PrintJobStatus::Queued {
159                job.status = PrintJobStatus::Cancelled;
160                return true;
161            }
162        }
163        false
164    }
165
166    /// Get the status of a specific job.
167    pub fn get_status(&self, job_id: PrintJobId) -> Option<PrintJobStatus> {
168        self.jobs.iter().find(|j| j.id == job_id).map(|j| j.status)
169    }
170
171    /// Number of jobs currently in the queue.
172    pub fn pending_count(&self) -> usize {
173        self.jobs
174            .iter()
175            .filter(|j| j.status == PrintJobStatus::Queued)
176            .count()
177    }
178
179    /// Total number of jobs in the queue (all statuses).
180    pub fn total_count(&self) -> usize {
181        self.jobs.len()
182    }
183
184    /// Mark a job as completed and update stats.
185    pub fn complete_job(&mut self, job_id: PrintJobId) -> bool {
186        for job in &mut self.jobs {
187            if job.id == job_id {
188                job.status = PrintJobStatus::Completed;
189                self.total_completed += 1;
190                return true;
191            }
192        }
193        false
194    }
195
196    /// Remove completed and cancelled jobs from the queue.
197    pub fn purge_finished(&mut self) {
198        self.jobs.retain(|j| {
199            j.status != PrintJobStatus::Completed && j.status != PrintJobStatus::Cancelled
200        });
201    }
202}
203
204// ---------------------------------------------------------------------------
205// Printer configuration
206// ---------------------------------------------------------------------------
207
208/// Printer driver type.
209#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
210pub enum PrinterDriver {
211    /// Virtual printer (writes to file or memory).
212    #[default]
213    Virtual,
214    /// IPP network printer.
215    Ipp,
216    /// Raw passthrough (direct data to device).
217    Raw,
218}
219
220/// Configuration for a single printer.
221#[derive(Debug, Clone)]
222pub struct PrinterConfig {
223    /// Printer name (unique identifier).
224    pub name: String,
225    /// Driver type.
226    pub driver_type: PrinterDriver,
227    /// Output resolution in DPI.
228    pub resolution_dpi: u32,
229    /// Default paper size.
230    pub paper_size: PaperSize,
231    /// Whether this printer is enabled.
232    pub enabled: bool,
233    /// Whether this is the default printer.
234    pub is_default: bool,
235}
236
237impl PrinterConfig {
238    /// Create a new printer configuration.
239    pub fn new(name: &str, driver_type: PrinterDriver) -> Self {
240        Self {
241            name: String::from(name),
242            driver_type,
243            resolution_dpi: 300,
244            paper_size: PaperSize::Letter,
245            enabled: true,
246            is_default: false,
247        }
248    }
249}
250
251// ---------------------------------------------------------------------------
252// Print spooler
253// ---------------------------------------------------------------------------
254
255/// Central print spooler managing multiple printer queues.
256#[derive(Debug)]
257pub struct PrintSpooler {
258    /// Queues indexed by printer name.
259    queues: BTreeMap<String, PrintQueue>,
260    /// Printer configurations indexed by name.
261    printers: BTreeMap<String, PrinterConfig>,
262    /// Next job ID to assign.
263    next_job_id: PrintJobId,
264    /// Default printer name.
265    default_printer: Option<String>,
266}
267
268impl Default for PrintSpooler {
269    fn default() -> Self {
270        Self::new()
271    }
272}
273
274impl PrintSpooler {
275    /// Create a new empty spooler.
276    pub fn new() -> Self {
277        Self {
278            queues: BTreeMap::new(),
279            printers: BTreeMap::new(),
280            next_job_id: 1,
281            default_printer: None,
282        }
283    }
284
285    /// Add a printer to the spooler.
286    pub fn add_printer(&mut self, config: PrinterConfig) {
287        let name = config.name.clone();
288        let is_default = config.is_default;
289        self.printers.insert(name.clone(), config);
290        self.queues.insert(name.clone(), PrintQueue::new(100));
291        if is_default || self.default_printer.is_none() {
292            self.default_printer = Some(name);
293        }
294    }
295
296    /// Remove a printer by name.
297    pub fn remove_printer(&mut self, name: &str) -> bool {
298        let removed = self.printers.remove(name).is_some();
299        self.queues.remove(name);
300        if self.default_printer.as_deref() == Some(name) {
301            self.default_printer = self.printers.keys().next().cloned();
302        }
303        removed
304    }
305
306    /// Submit a job to a specific printer (or the default).
307    pub fn submit_job(
308        &mut self,
309        printer: Option<&str>,
310        document_name: &str,
311        data: Vec<u8>,
312    ) -> Option<PrintJobId> {
313        let printer_name = printer
314            .map(String::from)
315            .or_else(|| self.default_printer.clone())?;
316
317        let queue = self.queues.get_mut(&printer_name)?;
318
319        let id = self.next_job_id;
320        self.next_job_id += 1;
321        let job = PrintJob::new(id, document_name, data);
322
323        if queue.enqueue(job) {
324            Some(id)
325        } else {
326            None
327        }
328    }
329
330    /// List all jobs for a printer.
331    pub fn list_jobs(&self, printer: &str) -> Vec<&PrintJob> {
332        self.queues
333            .get(printer)
334            .map(|q| q.jobs.iter().collect())
335            .unwrap_or_default()
336    }
337
338    /// Cancel a job.
339    pub fn cancel_job(&mut self, printer: &str, job_id: PrintJobId) -> bool {
340        self.queues
341            .get_mut(printer)
342            .map(|q| q.cancel(job_id))
343            .unwrap_or(false)
344    }
345
346    /// Get the number of printers.
347    pub fn printer_count(&self) -> usize {
348        self.printers.len()
349    }
350
351    /// Get the default printer name.
352    pub fn default_printer(&self) -> Option<&str> {
353        self.default_printer.as_deref()
354    }
355
356    /// Get a printer configuration by name.
357    pub fn get_printer(&self, name: &str) -> Option<&PrinterConfig> {
358        self.printers.get(name)
359    }
360}
361
362// ---------------------------------------------------------------------------
363// IPP/1.1 protocol stubs
364// ---------------------------------------------------------------------------
365
366/// IPP operation codes (subset).
367#[derive(Debug, Clone, Copy, PartialEq, Eq)]
368#[repr(u16)]
369pub enum IppOperation {
370    /// Print a new job.
371    PrintJob = 0x0002,
372    /// Validate a job before submission.
373    ValidateJob = 0x0004,
374    /// Create a job (without data).
375    CreateJob = 0x0005,
376    /// Get job attributes.
377    GetJobAttributes = 0x0009,
378    /// Get printer attributes.
379    GetPrinterAttributes = 0x000B,
380    /// Cancel a job.
381    CancelJob = 0x0008,
382}
383
384/// IPP status codes (subset).
385#[derive(Debug, Clone, Copy, PartialEq, Eq)]
386#[repr(u16)]
387pub enum IppStatus {
388    /// Successful.
389    Ok = 0x0000,
390    /// Client error: bad request.
391    ClientBadRequest = 0x0400,
392    /// Client error: not found.
393    ClientNotFound = 0x0406,
394    /// Server error: internal.
395    ServerInternal = 0x0500,
396}
397
398/// An IPP request.
399#[derive(Debug, Clone)]
400pub struct IppRequest {
401    /// IPP version (major, minor).
402    pub version: (u8, u8),
403    /// Operation code.
404    pub operation: IppOperation,
405    /// Request ID.
406    pub request_id: u32,
407    /// Operation attributes (key-value pairs).
408    pub attributes: BTreeMap<String, String>,
409}
410
411impl IppRequest {
412    /// Create a new request.
413    pub fn new(operation: IppOperation, request_id: u32) -> Self {
414        Self {
415            version: (1, 1),
416            operation,
417            request_id,
418            attributes: BTreeMap::new(),
419        }
420    }
421}
422
423/// An IPP response.
424#[derive(Debug, Clone)]
425pub struct IppResponse {
426    /// IPP version (major, minor).
427    pub version: (u8, u8),
428    /// Status code.
429    pub status: IppStatus,
430    /// Request ID (matches the request).
431    pub request_id: u32,
432    /// Response attributes.
433    pub attributes: BTreeMap<String, String>,
434}
435
436impl IppResponse {
437    /// Create a success response.
438    pub fn ok(request_id: u32) -> Self {
439        Self {
440            version: (1, 1),
441            status: IppStatus::Ok,
442            request_id,
443            attributes: BTreeMap::new(),
444        }
445    }
446
447    /// Create an error response.
448    pub fn error(request_id: u32, status: IppStatus) -> Self {
449        Self {
450            version: (1, 1),
451            status,
452            request_id,
453            attributes: BTreeMap::new(),
454        }
455    }
456}
457
458// ---------------------------------------------------------------------------
459// Tests
460// ---------------------------------------------------------------------------
461
462#[cfg(test)]
463mod tests {
464    #[allow(unused_imports)]
465    use alloc::vec;
466
467    use super::*;
468
469    #[test]
470    fn test_print_job_new() {
471        let job = PrintJob::new(1, "test.pdf", vec![0u8; 100]);
472        assert_eq!(job.id, 1);
473        assert_eq!(job.status, PrintJobStatus::Queued);
474        assert_eq!(job.data_size(), 100);
475    }
476
477    #[test]
478    fn test_print_queue_enqueue_dequeue() {
479        let mut queue = PrintQueue::new(10);
480        let job = PrintJob::new(1, "test.pdf", vec![]);
481        assert!(queue.enqueue(job));
482        assert_eq!(queue.pending_count(), 1);
483        let dequeued = queue.dequeue().unwrap();
484        assert_eq!(dequeued.id, 1);
485        assert_eq!(dequeued.status, PrintJobStatus::Printing);
486    }
487
488    #[test]
489    fn test_print_queue_full() {
490        let mut queue = PrintQueue::new(1);
491        assert!(queue.enqueue(PrintJob::new(1, "a", vec![])));
492        assert!(!queue.enqueue(PrintJob::new(2, "b", vec![])));
493    }
494
495    #[test]
496    fn test_print_queue_cancel() {
497        let mut queue = PrintQueue::new(10);
498        queue.enqueue(PrintJob::new(1, "test", vec![]));
499        assert!(queue.cancel(1));
500        assert_eq!(queue.get_status(1), Some(PrintJobStatus::Cancelled));
501    }
502
503    #[test]
504    fn test_spooler_add_printer() {
505        let mut spooler = PrintSpooler::new();
506        let config = PrinterConfig::new("pdf-printer", PrinterDriver::Virtual);
507        spooler.add_printer(config);
508        assert_eq!(spooler.printer_count(), 1);
509        assert_eq!(spooler.default_printer(), Some("pdf-printer"));
510    }
511
512    #[test]
513    fn test_spooler_submit_job() {
514        let mut spooler = PrintSpooler::new();
515        spooler.add_printer(PrinterConfig::new("lp0", PrinterDriver::Virtual));
516        let id = spooler.submit_job(Some("lp0"), "doc.pdf", vec![1, 2, 3]);
517        assert!(id.is_some());
518        let jobs = spooler.list_jobs("lp0");
519        assert_eq!(jobs.len(), 1);
520    }
521
522    #[test]
523    fn test_spooler_default_printer() {
524        let mut spooler = PrintSpooler::new();
525        let id = spooler.submit_job(None, "doc", vec![]);
526        assert!(id.is_none()); // No default printer
527        spooler.add_printer(PrinterConfig::new("lp0", PrinterDriver::Virtual));
528        let id = spooler.submit_job(None, "doc", vec![]);
529        assert!(id.is_some());
530    }
531
532    #[test]
533    fn test_paper_size() {
534        assert_eq!(PaperSize::Letter.width_pts(), 612);
535        assert_eq!(PaperSize::A4.height_pts(), 842);
536    }
537}
veridian_kernel/services/print.rs

veridian_kernel/services/
print.rs
