Update queuing and display results of file parsing

* Make the 'worker' functions free from needing the application
  context by passing all the details they need as arguments.
* Enable the display of parsing results.

1 files changed, 53 insertions, 41 deletions

diff --git a/qc_app/parse.py b/qc_app/parse.py
index ffdd123..3398918 100644
--- a/qc_app/parse.py
+++ b/qc_app/parse.py
@@ -1,6 +1,8 @@
 """File parsing module"""
 import os
+from functools import reduce
 
+from redis import Redis
 from rq import get_current_job
 from flask import (
     request,
@@ -21,32 +23,32 @@ from quality_control.parsing import (
 
 parsebp = Blueprint("parse", __name__)
 
-def queued_parse(filepath, filetype):
-    from qc_app import create_app, instance_path
-    app = create_app(instance_path())
-    app.app_context().push()
-
+def queued_parse(filepath, filetype, strainsfile, redis_url):
     job = get_current_job()
-    jobs.update_meta(job, status = "in-progress", progress = 0)
-    job.save_meta()
-    try:
-        parsed = parse_file(
-            filepath, filetype, strain_names(parse_strains("strains.csv")))
-        for line, curr_size in parsed:
+    with Redis.from_url(redis_url) as rconn:
+        jobs.update_meta(rconn, job, status = "in-progress", progress = 0)
+        job.save_meta()
+        try:
+            parsed = parse_file(
+                filepath, filetype, strain_names(parse_strains(strainsfile)))
+            for line, curr_size in parsed:
+                jobs.update_meta(
+                    rconn, job, progress = (curr_size/job.meta["filesize"]) * 100,
+                    message = f"Parsed {curr_size} bytes")
+                print(f"Progress: {curr_size} bytes: {(curr_size/job.meta['filesize']) * 100}%")
+
+            os.remove(filepath)
             jobs.update_meta(
-                job, progress = (curr_size/job.meta["filesize"]) * 100,
-                message = f"Parsed {curr_size} bytes")
-
-        os.remove(filepath)
-        jobs.update_meta(
-            job, progress = 10, status = "success", message = "no errors found")
-    except ParseError as pe:
-        pe_dict = pe.args[0]
-        jobs.update_meta(
-            job, status = "parse-error", results = {
-                "filename": os.path.basename(filepath), "filetype": filetype,
-                "position": pe_dict["position"]
-            })
+                rconn, job, progress = 10, status = "success",
+                message = "no errors found")
+        except ParseError as pe:
+            pe_dict = pe.args[0]
+            jobs.update_meta(
+                rconn, job, status = "parse-error", results = {
+                    "filename": os.path.basename(filepath), "filetype": filetype,
+                    "position": pe_dict["position"],
+                    "line_number": pe_dict["line_number"]
+                })
 
 @parsebp.route("/parse", methods=["GET"])
 def parse():
@@ -75,6 +77,7 @@ def parse():
         FileType.AVERAGE if filetype == "average" else FileType.STANDARD_ERROR)
     job = jobs.enqueue_job(
         "qc_app.parse.queued_parse", filepath, filetype,
+        os.path.join(os.getcwd(), "etc/strains.csv"), app.config["REDIS_URL"],
         additional_jobs_meta = {
             "filename": filename, "filesize": os.stat(filepath).st_size})
     return redirect(url_for("parse.parse_status", job_id=job.get_id()))
@@ -105,28 +108,35 @@ def parse_status(job_id):
 
 @parsebp.route("/results/<job_id>", methods=["GET"])
 def results(job_id):
-    """Indicates success if parsing the file is successful"""
-    return "STUB: Parse success!!!"
+    """Show results of parsing..."""
+    job = jobs.job(job_id)
+    if job:
+        filename = job.meta["filename"]
+        errors = job.meta.get("errors", [])
+        return render_template(
+            "parse_results.html",
+            errors=errors,
+            job_name = f"Parsing '{filename}'",
+            starting_line_number=job.meta.get("starting_line_number", 0))
 
-def queued_collect_errors(filepath, filetype, seek_pos=0):
-    from qc_app import create_app, instance_path
-    app = create_app(instance_path())
-    app.app_context().push()
+    return render_template("no_such_job.html", job_id=job_id)
 
+def queued_collect_errors(filepath, filetype, strainsfile, redis_url, seek_pos=0):
     job = get_current_job()
     errors = []
     count = 0
+    with Redis.from_url(redis_url) as rconn:
+        for error in parse_errors(
+                filepath, filetype, strain_names(parse_strains(strainsfile)),
+                seek_pos):
+            count = count + 1
+            jobs.update_meta(
+                rconn, job, message = f"Collected {count} errors", progress = (
+                    (error["position"] / job.meta["filesize"]) * 100))
+            errors.append(error)
 
-    for error in parse_errors(
-            filepath, filetype, strain_names(parse_strains("strains.csv")),
-            seek_pos):
-        count = count + 1
         jobs.update_meta(
-            job, message = f"Collected {count} errors", progress = (
-                (error["position"] / job.meta["filesize"]) * 100))
-        errors.append(error)
-
-    jobs.update_meta(job, errors = errors, progress = 100, status = "success")
+            rconn, job, errors = errors, progress = 100, status = "success")
 
 @parsebp.route("/fail/<job_id>", methods=["GET"])
 def fail(job_id):
@@ -144,11 +154,13 @@ def fail(job_id):
             "qc_app.parse.queued_collect_errors",
             os.path.join(
                 app.config["UPLOAD_FOLDER"], old_job.meta["filename"]),
-            results["filetype"], results["position"],
+            results["filetype"], os.path.join(os.getcwd(), "etc/strains.csv"),
+            app.config["REDIS_URL"], results["position"],
             additional_jobs_meta = {
                 "status": "Collecting Errors",
                 "filename": old_job.meta["filename"],
-                "filesize": old_job.meta["filesize"]})
+                "filesize": old_job.meta["filesize"],
+                "starting_line_number": results["line_number"]})
         return redirect(url_for("parse.parse_status", job_id=new_job.get_id()))
 
     return render_template("no_such_job.html", job_id=job_id)