Bye bye Groovy, you won't be missed :(

src/main/java/io/kamax/mxisd/auth/AuthManager.java

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+/*
+ * mxisd - Matrix Identity Server Daemon
+ * Copyright (C) 2017 Maxime Dor
+ *
+ * https://max.kamax.io/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package io.kamax.mxisd.auth;
+
+import io.kamax.matrix.MatrixID;
+import io.kamax.matrix._MatrixID;
+import io.kamax.mxisd.ThreePid;
+import io.kamax.mxisd.UserIdType;
+import io.kamax.mxisd.auth.provider.AuthenticatorProvider;
+import io.kamax.mxisd.auth.provider.BackendAuthResult;
+import io.kamax.mxisd.config.MatrixConfig;
+import io.kamax.mxisd.invitation.InvitationManager;
+import io.kamax.mxisd.lookup.ThreePidMapping;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Service
+public class AuthManager {
+
+    private Logger log = LoggerFactory.getLogger(AuthManager.class);
+
+    @Autowired
+    private List<AuthenticatorProvider> providers = new ArrayList<>();
+
+    @Autowired
+    private MatrixConfig mxCfg;
+
+    @Autowired
+    private InvitationManager invMgr;
+
+    public UserAuthResult authenticate(String id, String password) {
+        _MatrixID mxid = new MatrixID(id);
+        for (AuthenticatorProvider provider : providers) {
+            if (!provider.isEnabled()) {
+                continue;
+            }
+
+            BackendAuthResult result = provider.authenticate(mxid, password);
+            if (result.isSuccess()) {
+
+                String mxId;
+                if (UserIdType.Localpart.is(result.getId().getType())) {
+                    mxId = new MatrixID(result.getId().getValue(), mxCfg.getDomain()).getId();
+                } else if (UserIdType.MatrixID.is(result.getId().getType())) {
+                    mxId = new MatrixID(result.getId().getValue()).getId();
+                } else {
+                    log.warn("Unsupported User ID type {} for backend {}", result.getId().getType(), provider.getClass().getSimpleName());
+                    continue;
+                }
+
+                UserAuthResult authResult = new UserAuthResult().success(mxId, result.getProfile().getDisplayName());
+                for (ThreePid pid : result.getProfile().getThreePids()) {
+                    authResult.withThreePid(pid.getMedium(), pid.getAddress());
+                }
+                log.info("{} was authenticated by {}, publishing 3PID mappings, if any", id, provider.getClass().getSimpleName());
+                for (ThreePid pid : authResult.getThreePids()) {
+                    log.info("Processing {} for {}", pid, id);
+                    invMgr.publishMappingIfInvited(new ThreePidMapping(pid, authResult.getMxid()));
+                }
+
+                invMgr.lookupMappingsForInvites();
+
+                return authResult;
+            }
+        }
+
+        return new UserAuthResult().failure();
+    }
+
+}

src/main/java/io/kamax/mxisd/auth/UserAuthResult.java

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+/*
+ * mxisd - Matrix Identity Server Daemon
+ * Copyright (C) 2017 Maxime Dor
+ *
+ * https://max.kamax.io/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package io.kamax.mxisd.auth;
+
+import io.kamax.matrix.ThreePidMedium;
+import io.kamax.mxisd.ThreePid;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class UserAuthResult {
+
+    private boolean success;
+    private String mxid;
+    private String displayName;
+    private List<ThreePid> threePids = new ArrayList<>();
+
+    public UserAuthResult failure() {
+        success = false;
+        mxid = null;
+        displayName = null;
+
+        return this;
+    }
+
+    public UserAuthResult success(String mxid, String displayName) {
+        setSuccess(true);
+        setMxid(mxid);
+        setDisplayName(displayName);
+
+        return this;
+    }
+
+    public boolean isSuccess() {
+        return success;
+    }
+
+    public void setSuccess(boolean success) {
+        this.success = success;
+    }
+
+    public String getMxid() {
+        return mxid;
+    }
+
+    public void setMxid(String mxid) {
+        this.mxid = mxid;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public void setDisplayName(String displayName) {
+        this.displayName = displayName;
+    }
+
+    public UserAuthResult withThreePid(ThreePidMedium medium, String address) {
+        return withThreePid(medium.getId(), address);
+    }
+
+    public UserAuthResult withThreePid(String medium, String address) {
+        threePids.add(new ThreePid(medium, address));
+
+        return this;
+    }
+
+    public List<ThreePid> getThreePids() {
+        return Collections.unmodifiableList(threePids);
+    }
+
+}

src/main/java/io/kamax/mxisd/auth/provider/AuthenticatorProvider.java

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+/*
+ * mxisd - Matrix Identity Server Daemon
+ * Copyright (C) 2017 Maxime Dor
+ *
+ * https://max.kamax.io/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package io.kamax.mxisd.auth.provider;
+
+import io.kamax.matrix._MatrixID;
+
+public interface AuthenticatorProvider {
+
+    boolean isEnabled();
+
+    BackendAuthResult authenticate(_MatrixID mxid, String password);
+
+}

src/main/java/io/kamax/mxisd/auth/provider/BackendAuthResult.java

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+/*
+ * mxisd - Matrix Identity Server Daemon
+ * Copyright (C) 2017 Maxime Dor
+ *
+ * https://max.kamax.io/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package io.kamax.mxisd.auth.provider;
+
+import io.kamax.mxisd.ThreePid;
+import io.kamax.mxisd.UserID;
+import io.kamax.mxisd.UserIdType;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class BackendAuthResult {
+
+    public static class BackendAuthProfile {
+
+        private String displayName;
+        private List<ThreePid> threePids = new ArrayList<>();
+
+        public String getDisplayName() {
+            return displayName;
+        }
+
+        public List<ThreePid> getThreePids() {
+            return threePids;
+        }
+    }
+
+    public static BackendAuthResult failure() {
+        BackendAuthResult r = new BackendAuthResult();
+        r.success = false;
+        return r;
+    }
+
+    public void fail() {
+        success = false;
+    }
+
+    public static BackendAuthResult success(String id, UserIdType type, String displayName) {
+        return success(id, type.getId(), displayName);
+    }
+
+    public static BackendAuthResult success(String id, String type, String displayName) {
+        BackendAuthResult r = new BackendAuthResult();
+        r.succeed(id, type, displayName);
+        return r;
+    }
+
+    public void succeed(String id, String type, String displayName) {
+        this.success = true;
+        this.id = new UserID(type, id);
+        this.profile = new BackendAuthProfile();
+        this.profile.displayName = displayName;
+    }
+
+    private Boolean success;
+    private UserID id;
+    private BackendAuthProfile profile = new BackendAuthProfile();
+
+    public Boolean isSuccess() {
+        return success;
+    }
+
+    public UserID getId() {
+        return id;
+    }
+
+    public BackendAuthProfile getProfile() {
+        return profile;
+    }
+
+    public BackendAuthResult withThreePid(ThreePid threePid) {
+        this.profile.threePids.add(threePid);
+
+        return this;
+    }
+
+}