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264 lines
8.5 KiB
264 lines
8.5 KiB
package de.srsoftware.widerhall.data; |
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import de.srsoftware.widerhall.Util; |
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import org.antlr.runtime.MismatchedTokenException; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import org.stringtemplate.v4.ST; |
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import java.sql.ResultSet; |
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import java.sql.SQLException; |
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import java.util.*; |
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import static de.srsoftware.widerhall.Constants.*; |
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import static de.srsoftware.widerhall.Constants.STATE; |
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/** |
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* @author Stephan Richter |
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* This class embodies the ListMembers table |
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*/ |
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public class ListMember { |
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public static final String TABLE_NAME = "ListMembers"; |
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public static final int STATE_OWNER = 1; |
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public static final int STATE_SUBSCRIBER = 2; |
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public static final int STATE_AWAITING_CONFIRMATION = 4; |
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private static final Logger LOG = LoggerFactory.getLogger(ListMember.class); |
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private static final String LIST_EMAIL = "list_email"; |
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private static final String USER_EMAIL = "user_email"; |
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private static final String STATE = "state"; |
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private MailingList list; |
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private User user; |
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private final String token; |
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private final int state; |
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/** |
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* create a new list member object |
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* @param list |
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* @param user |
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* @param state |
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* @param token |
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*/ |
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public ListMember(MailingList list, User user, int state, String token){ |
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this.list = list; |
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this.user = user; |
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this.state = state; |
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this.token = token; |
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} |
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/** |
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* tries to confirm the token: |
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* This method loads the list member, that is assigned with the token. |
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* If no db entry is found for the token, null is returned. |
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* If an entry is found, the respective User object is loaded. |
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* If no User object is assigned, null is returned. |
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* If a matching User object is present, the member's state is altered from AWAITING_CONFIRMATION to SUBSCRIBER and the token is dropped. |
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* @param token |
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* @return |
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* @throws SQLException |
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*/ |
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public static User confirm(String token) throws SQLException { |
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var rs = Database.open().select(TABLE_NAME).where(TOKEN,token).compile().exec(); |
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if (rs.next()){ |
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var lm = ListMember.from(rs); |
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rs.close(); |
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if (lm.user != null){ |
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int newState = lm.state ^ STATE_AWAITING_CONFIRMATION | STATE_SUBSCRIBER; |
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Database.open() |
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.update(TABLE_NAME) |
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.set(TOKEN,null) |
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.set(STATE, newState) //drop confirmation state, set subscriber state |
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.where(LIST_EMAIL,lm.list.email()) |
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.where(USER_EMAIL,lm.user.email()) |
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.compile() |
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.run(); |
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} |
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return lm.user; |
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} |
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return null; |
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} |
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/** |
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* Create a new list member entry in the database. |
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* If the member has the state AWAITING_CONFIRMATION, a token is assigned with the member, too. |
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* @param list |
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* @param user |
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* @param state |
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* @return |
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* @throws SQLException |
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*/ |
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public static ListMember create(MailingList list, User user, int state) throws SQLException { |
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String token = null; |
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if ((state & STATE_AWAITING_CONFIRMATION) > 0){ |
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token = Util.sha256(String.join("/",list.email(),user.email(),user.salt())); |
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} |
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return new ListMember(list,user,state,token).save(); |
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} |
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/** |
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* create the table for ListMember objects |
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* @throws SQLException |
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*/ |
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public static void createTable() throws SQLException { |
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var sql = new StringBuilder() |
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.append("CREATE TABLE ").append(TABLE_NAME) |
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.append(" (") |
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.append(LIST_EMAIL).append(" ").append(VARCHAR).append(", ") |
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.append(USER_EMAIL).append(" ").append(VARCHAR).append(", ") |
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.append(STATE).append(" ").append(INT).append(", ") |
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.append(TOKEN).append(" ").append(VARCHAR).append(", ") |
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.append("PRIMARY KEY (").append(LIST_EMAIL).append(", ").append(USER_EMAIL).append("));"); |
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Database.open().query(sql).compile().run(); |
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} |
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/** |
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* create a new ListMember object from a ResultSet |
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* @param rs |
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* @return |
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* @throws SQLException |
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*/ |
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public static ListMember from(ResultSet rs) throws SQLException { |
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return new ListMember( |
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MailingList.load(rs.getString(LIST_EMAIL)), |
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User.load(rs.getString(USER_EMAIL)), |
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rs.getInt(STATE), |
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rs.getString(TOKEN)); |
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} |
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/** |
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* test, if the current object has a given state |
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* @param testState |
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* @return |
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*/ |
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public boolean hasState(int testState) { |
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return (state & testState) > 0; |
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} |
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public boolean isOwner(){ |
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return hasState(STATE_OWNER); |
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} |
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/** |
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* return a set of list emails of MailingLists owned by the given user |
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* @param user |
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* @return |
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*/ |
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public static Set<String> listsOwnedBy(User user) { |
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var list = new HashSet<String>(); |
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try { |
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var request = Database.open().select(TABLE_NAME, LIST_EMAIL, STATE+" & "+STATE_OWNER+" as "+STATE); |
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if (!user.hashPermission(User.PERMISSION_ADMIN)) request = request.where(USER_EMAIL, user.email()).where(STATE, STATE_OWNER); |
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var rs = request.compile().exec(); |
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while (rs.next()) list.add(rs.getString(LIST_EMAIL)); |
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} catch (SQLException e) { |
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LOG.warn("Sammeln der Listen von {} fehlgeschlagen: ",user.email(),e); |
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} |
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return list; |
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} |
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/** |
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* load the list member specified by a MailingList and as User object |
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* @param list |
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* @param user |
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* @return |
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* @throws SQLException |
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*/ |
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public static ListMember load(MailingList list,User user) throws SQLException { |
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var rs = Database |
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.open() |
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.select(TABLE_NAME) |
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.where(LIST_EMAIL,list.email()) |
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.where(USER_EMAIL,user.email()) |
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.compile() |
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.exec(); |
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try { |
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if (rs.next()) return ListMember.from(rs); |
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} finally { |
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rs.close(); |
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} |
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return null; |
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} |
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public static Set<ListMember> of(MailingList list) throws SQLException { |
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var rs = Database.open().select(TABLE_NAME).where(LIST_EMAIL,list.email()).compile().exec(); |
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var set = new HashSet<ListMember>(); |
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try { |
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while (rs.next()) set.add(ListMember.from(rs)); |
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} finally { |
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rs.close(); |
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} |
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return set; |
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} |
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public Map<String,Object> safeMap(){ |
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return Map.of( |
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EMAIL,user.email(), |
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NAME,user.name(), |
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STATE,ListMember.stateText(state) |
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); |
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} |
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/** |
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* Save the current ListMember object to the database |
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* @return |
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* @throws SQLException |
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*/ |
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private ListMember save() throws SQLException { |
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var req = Database.open() |
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.insertInto(TABLE_NAME) |
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.set(LIST_EMAIL,list.email()) |
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.set(USER_EMAIL,user.email()) |
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.set(STATE,state); |
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if (token != null) req.set(TOKEN,token); |
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req.compile().run(); |
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return this; |
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} |
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/** |
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* convert state flag to readable text |
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* @param state |
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* @return |
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*/ |
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public static String stateText(int state) { |
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var words = new ArrayList<String>(); |
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if ((state & STATE_OWNER) > 0) words.add("Besitzer"); |
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if ((state & STATE_SUBSCRIBER) > 0) words.add("Abonniert"); |
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if ((state & STATE_AWAITING_CONFIRMATION) > 0) words.add("erwartet Bestätigung"); |
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return String.join(", ",words); |
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} |
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/** |
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* get the token of the current list member |
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* @return |
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*/ |
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public String token() { |
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return token; |
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} |
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/** |
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* unsubscribe a list member |
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* @param list |
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* @param user |
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* @throws SQLException |
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*/ |
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public static void unsubscribe(MailingList list, User user) throws SQLException { |
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var db = Database.open(); |
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var rs = db.select(TABLE_NAME) |
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.where(LIST_EMAIL,list.email()) |
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.where(USER_EMAIL,user.email()) |
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.compile() |
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.exec(); |
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while (rs.next()){ |
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int state = Util.unset(rs.getInt(STATE),STATE_SUBSCRIBER,STATE_AWAITING_CONFIRMATION); // drop subscription and awaiting flags |
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var req = state < 1 ? db.deleteFrom(TABLE_NAME) : db.update(TABLE_NAME).set(STATE,state).set(TOKEN,null); |
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req.where(LIST_EMAIL,list.email()).where(USER_EMAIL,user.email()).compile().run(); |
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} |
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} |
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public User user(){ |
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return user; |
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} |
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}
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