added get path
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@@ -6,10 +6,9 @@ import java.util.Vector;
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public class JodelPost {
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// id of the post
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private Long id;
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public Long id;
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// id of the author in db
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private Long authorID;
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// anonymized authorID
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public Long anonymousID;
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// title of the post
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@@ -53,8 +52,26 @@ public class JodelPost {
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}
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}
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// TODO: create constructor
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public JodelPost(long id) {
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this.authorID = id;
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// add a comment if it is really a comment
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public boolean addComment(JodelPost post, long parent) {
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// check if the post a direct comment
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if (parent == this.id) {
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// add the comment
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this.comments.add(post);
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// return success
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return true;
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}
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// recursively repeat this for all comments
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for (JodelPost comment : this.comments) {
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// return success if the post is a comment on a child
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if (comment.addComment(post, parent)) return true;
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}
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// return no success
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return false;
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}
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// constructor with private authorID
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public JodelPost(long authorID) {
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this.authorID = authorID;
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}
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}
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@@ -1,24 +1,123 @@
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package de.anxietyprime.swajodel;
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import com.fasterxml.jackson.databind.JsonSerializer;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.RestController;
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import java.sql.*;
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import java.util.Optional;
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import java.util.Vector;
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@RestController
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public class Routes {
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@GetMapping("")
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public JodelPost test() {
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// TODO: remove dec post
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JodelPost post = new JodelPost(100);
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@GetMapping("/posts/{longitude}/{latitude}")
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public Vector<JodelPost> getPosts(@PathVariable("longitude") float longitude, @PathVariable("latitude") float latitude) {
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// list of all posts (not comments) in range
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Vector<JodelPost> posts = new Vector<>();
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// calculate anonymous IDs for the post
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// DB connection and statement
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Connection c = null;
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PreparedStatement stmt = null;
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// try to get data from db
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try {
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// check for the driver
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Class.forName("org.postgresql.Driver");
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// get the connection with credentials from env variables
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c = DriverManager
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.getConnection("jdbc:postgresql://"+
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System.getenv("POSTGRES_IP")+"/"+System.getenv("POSTGRES_DB"),
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System.getenv("POSTGRES_USER"), System.getenv("POSTGRES_PASSWORD"));
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// disable auto commits
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c.setAutoCommit(false);
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// create a new statement
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stmt = c.prepareStatement("WITH RECURSIVE targets AS (\n" +
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" SELECT\n" +
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" id,\n" +
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" id AS parent,\n" +
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" author,\n" +
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" title,\n" +
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" content,\n" +
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" postdate,\n" +
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" postlocation[0] AS longitude,\n" +
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" postlocation[1] AS latitude\n" +
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" FROM\n" +
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" posts\n" +
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" WHERE\n" +
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" deleted IS NULL\n" +
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" AND sqrt(power(postlocation[0] - (?), 2) + power(postlocation[1] - (?), 2)) <= 10\n" +
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" AND id NOT IN (SELECT child FROM comments)\n" +
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" UNION\n" +
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" SELECT\n" +
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" com.child,\n" +
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" com.parent,\n" +
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" com.author,\n" +
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" com.title,\n" +
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" com.content,\n" +
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" com.postdate,\n" +
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" com.postlocation[0],\n" +
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" com.postlocation[1]\n" +
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" FROM\n" +
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" (SELECT * FROM comments inner join posts ON comments.child = posts.id) com\n" +
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" inner join targets ON targets.id = com.parent\n" +
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")\n" +
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"SELECT * FROM targets;");
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stmt.setObject(1, longitude);
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stmt.setObject(2, latitude);
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// query recursively for posts inside a 10km radius
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ResultSet rs = stmt.executeQuery();
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// for all the posts found
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while ( rs.next() ) {
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// create a post from the author id
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JodelPost post = new JodelPost(rs.getLong("author"));
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// add all other information to the post
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post.id = rs.getLong("id");
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post.title = rs.getString("title");
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post.content = rs.getString("content");
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post.date = rs.getDate("postdate");
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post.location = new Location(rs.getLong("longitude"), rs.getLong("latitude"));
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// get the posts parent
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long parent = rs.getLong("parent");
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// check if the parent is the own id
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// if it is, it is a post
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if (parent == post.id) {
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// add the post to the posts
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posts.add(post);
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}
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// else it is a comment
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else {
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// iterate over all posts
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for (JodelPost p : posts) {
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// try to add the post to a parent
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p.addComment(post, parent);
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}
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}
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}
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// close all connections to db
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rs.close();
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stmt.close();
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c.close();
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}
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// else log the error
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catch ( Exception e ) {
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System.err.println( e.getClass().getName()+": "+ e.getMessage() );
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}
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// calculate anonymous IDs for the posts
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posts.forEach(post -> {
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post.anonymize(Optional.empty());
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// return the post
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return post;
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});
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// return the posts
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return posts;
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}
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}
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