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Adv 2.0 D&D Phase 9 SP4: mage spellbook cap + level-up nudge

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- Enforce per-level Mage known-spell cap in handleSpellsLearn; surface
  spellbook budget in renderSpellsList.
- Mage level-up DM now nudges with "Spells available to learn: N" via
  extracted buildLevelUpMessage.
- Extract halveSavedDamage and enemySpellSaveMod for clarity; document
  single-target AoE limitation in applySpellDamageSave.
- Add tests: mage learn cap, prepare flow, AoE behavior, spell save
  rounding, spells migration.
This commit is contained in:
prosolis
2026-05-08 09:10:05 -07:00
parent 01c70f5297
commit b53e516bf0
9 changed files with 870 additions and 13 deletions
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28
internal/plugin/dnd_xp.go
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@@ -142,12 +142,20 @@ func (p *AdventurePlugin) sendLevelUpDM(userID id.UserID, c *DnDCharacter, event
if p == nil || p.Client == nil {
return // tests construct AdventurePlugin{} without a Matrix client
}
if err := p.SendDM(userID, buildLevelUpMessage(c, events, dndLevelUpFlavorLine())); err != nil {
slog.Error("dnd: level-up DM failed", "user", userID, "err", err)
}
}
// buildLevelUpMessage formats the level-up DM. flavor is the optional flavor
// line (pass "" to skip). Pure function — exposed for tests.
func buildLevelUpMessage(c *DnDCharacter, events []LevelUpEvent, flavor string) string {
ri, _ := raceInfo(c.Race)
ci, _ := classInfo(c.Class)
var b strings.Builder
b.WriteString("✨ **LEVEL UP** ✨\n\n")
if line := dndLevelUpFlavorLine(); line != "" {
b.WriteString("_" + line + "_\n\n")
if flavor != "" {
b.WriteString("_" + flavor + "_\n\n")
}
if len(events) == 1 {
@@ -170,6 +178,17 @@ func (p *AdventurePlugin) sendLevelUpDM(userID id.UserID, c *DnDCharacter, event
b.WriteString(fmt.Sprintf("\nNext level: %d / %d XP.\n", c.XP, next))
}
// Mage spellbook budget: every level-up grants +2 leveled spells. Surface
// the headroom so the player knows to run `!spells learn`.
if c.Class == ClassMage {
count, _ := mageLeveledKnownCount(c.UserID)
cap := mageKnownSpellsCap(c.Level)
if avail := cap - count; avail > 0 {
b.WriteString(fmt.Sprintf("\n📖 _Spells available to learn: **%d** (run `!spells learn <name>`)._\n",
avail))
}
}
// Subclass selection cue: design doc specs a prompt at L5. Mechanics
// arrive in a future phase; for now the level-up DM mentions it so the
// player isn't surprised when it lands.
@@ -179,10 +198,7 @@ func (p *AdventurePlugin) sendLevelUpDM(userID id.UserID, c *DnDCharacter, event
break
}
}
if err := p.SendDM(userID, b.String()); err != nil {
slog.Error("dnd: level-up DM failed", "user", userID, "err", err)
}
return b.String()
}
// ── XP grant amounts ─────────────────────────────────────────────────────────