85 lines
2.6 KiB
Go
85 lines
2.6 KiB
Go
// This file is part of the happyDeliver (R) project.
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// Copyright (c) 2025 happyDomain
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// Authors: Pierre-Olivier Mercier, et al.
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//
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// This program is offered under a commercial and under the AGPL license.
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// For commercial licensing, contact us at <contact@happydomain.org>.
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//
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// For AGPL licensing:
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package analyzer
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import (
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"git.happydns.org/happyDeliver/internal/api"
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)
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// ScoreToGrade converts a percentage score (0-100) to a letter grade
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func ScoreToGrade(score int) string {
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switch {
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case score >= 97:
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return "A+"
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case score >= 93:
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return "A"
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case score >= 85:
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return "B"
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case score >= 75:
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return "C"
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case score >= 65:
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return "D"
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case score >= 50:
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return "E"
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default:
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return "F"
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}
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}
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// ScoreToReportGrade converts a percentage score to an api.ReportGrade
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func ScoreToReportGrade(score int) api.ReportGrade {
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return api.ReportGrade(ScoreToGrade(score))
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}
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// DeliverabilityScorer aggregates all analysis results and computes overall score
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type DeliverabilityScorer struct{}
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// NewDeliverabilityScorer creates a new deliverability scorer
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func NewDeliverabilityScorer() *DeliverabilityScorer {
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return &DeliverabilityScorer{}
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}
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// CalculateSpamScore calculates spam score from SpamAssassin results
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// Returns a score from 0-100 where higher is better
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func (s *DeliverabilityScorer) CalculateSpamScore(result *SpamAssassinResult) int {
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if result == nil {
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return 100 // No spam scan results, assume good
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}
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// SpamAssassin score typically ranges from -10 to +20
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// Score < 0 is very likely ham (good)
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// Score 0-5 is threshold range (configurable, usually 5.0)
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// Score > 5 is likely spam
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score := result.Score
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// Convert SpamAssassin score to 0-100 scale (inverted - lower SA score is better)
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if score <= 0 {
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return 100 // Perfect score for ham
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} else if score >= result.RequiredScore {
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return 0 // Failed spam test
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} else {
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// Linear scale between 0 and required threshold
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percentage := (score / result.RequiredScore) * 100
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return int(100 - percentage)
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}
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}
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