Fix CSV request parsing to skip policy type prefix and trim whitespace

[Copilot]

The plugin incorrectly passed policy type prefixes (p, g, etc.) from CSV lines as request arguments, causing "expected N arguments but received N+1" errors when evaluating requests against the model definition.

Changes

• Added conditional policy prefix detection: Skip first field if it matches ^(p|g\d*)$ pattern
• Trim whitespace from all fields: Handle CSV formatting with spaces after commas
• Extracted extractRequestValues() helper: Consolidates field processing logic from process() and onNewContent()

Example

For model r = sub, obj, act expecting 3 arguments:

// Before: passes ["p", "alice", "data2", "read"] → 4 arguments, error
// After:  passes ["alice", "data2", "read"] → 3 arguments, correct

// Input: "p, alice, data2, read"
extractRequestValues(record.fieldList)
// Returns: ["alice", "data2", "read"]

// Also handles: "alice, data2, read" (no prefix)
// Returns: ["alice", "data2", "read"]

Supports both formats users might reasonably enter in the request editor.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• cache-redirector.jetbrains.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.lang.invoke=ALL-UNNAMED --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.base/java.nio.charset=ALL-UNNAMED --add-opens java.base/java.net=ALL-UNNAMED --add-opens java.base/java.util.concurrent.atomic=ALL-UNNAMED -XX:MaxMetaspaceSize=256m (dns block)
• www.jetbrains.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.lang.invoke=ALL-UNNAMED --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.base/java.nio.charset=ALL-UNNAMED --add-opens java.base/java.net=ALL-UNNAMED --add-opens java.base/java.util.concurrent.atomic=ALL-UNNAMED -XX:MaxMetaspaceSize=256m (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[bug] Reports incorrect arguments</issue_title>
<issue_description>I will use the RBAC example from casbin like

Model:

[request_definition]
r = sub, obj, act

[policy_definition]
p = sub, obj, act

[role_definition]
g = _, _

[policy_effect]
e = some(where (p.eft == allow))

[matchers]
m = g(r.sub, p.sub) && r.obj == p.obj && r.act == p.act

and Policy:

p, alice, data1, read
p, bob, data2, write
p, data2_admin, data2, read
p, data2_admin, data2, write
g, alice, data2_admin

if I evaluate request:
alice, data2, read

i will get an error saying it expected 3 arguments but received 4, but no error on https://casbin.org/editor (source code: https://github.com/casbin/casbin-editor)

build: Build #WS-251.25410.117, built on May 7, 2025
Version: webstorm 2025.1.1</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [bug] Reports incorrect arguments #13

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