osm-io 0.3.0

Read and write OSM data
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160

use crate::osm::apidb_dump::read::relation_member_record::RelationMemberRecord;
use crate::osm::apidb_dump::read::relation_relation::RelationRelation;
use crate::osm::apidb_dump::read::relation_tag_record::RelationTagRecord;
use crate::osm::apidb_dump::read::table_def::TableDef;
use crate::osm::apidb_dump::read::table_reader::{TableIterator, TableReader};
use crate::osm::apidb_dump::read::table_record::TableRecord;

#[derive(Clone)]
pub(crate) struct RelationRelationsReader {
    relations_reader: TableReader,
    relation_members_reader: TableReader,
    relation_tags_reader: TableReader,
}

impl RelationRelationsReader {
    pub(crate) fn new(
        relations_def: &TableDef,
        relation_members_def: &TableDef,
        relation_tags_def: &TableDef,
    ) -> Result<RelationRelationsReader, anyhow::Error> {
        let relations_reader = TableReader::new(relations_def)?;
        let relation_members_reader = TableReader::new(relation_members_def)?;
        let relation_tags_reader = TableReader::new(relation_tags_def)?;
        Ok(
            RelationRelationsReader {
                relations_reader,
                relation_members_reader,
                relation_tags_reader,
            }
        )
    }
}

impl IntoIterator for RelationRelationsReader {
    type Item = RelationRelation;
    type IntoIter = RelationRelationsIterator;

    fn into_iter(self) -> Self::IntoIter {
        RelationRelationsIterator::new(&self).unwrap()
    }
}

pub(crate) struct RelationRelationsIterator {
    relations_iterator: TableIterator,
    relation_members_iterator: TableIterator,
    relation_tags_iterator: TableIterator,
    next_relation_member_record: Option<RelationMemberRecord>,
    next_relation_tag_record: Option<RelationTagRecord>,
}


impl RelationRelationsIterator {
    pub(crate) fn new(relation_relations_reader: &RelationRelationsReader) -> Result<RelationRelationsIterator, anyhow::Error> {
        let reader = relation_relations_reader.clone();
        let relations_iterator = reader.relations_reader.clone().into_iter();
        let relation_members_iterator = reader.relation_members_reader.clone().into_iter();
        let relation_tags_iterator = reader.relation_tags_reader.clone().into_iter();
        Ok(
            RelationRelationsIterator {
                relations_iterator,
                relation_members_iterator,
                relation_tags_iterator,
                next_relation_member_record: None,
                next_relation_tag_record: None,
            }
        )
    }
}

impl Iterator for RelationRelationsIterator {
    type Item = RelationRelation;

    fn next(&mut self) -> Option<Self::Item> {
        // ADD CONSTRAINT relation_members_id_fkey FOREIGN KEY (relation_id, version) REFERENCES public.relations(relation_id, version);
        // ADD CONSTRAINT relation_tags_id_fkey FOREIGN KEY (relation_id, version) REFERENCES public.relations(relation_id, version);
        if let Some(relation) = self.relations_iterator.next() {
            if let TableRecord::Relation { relation_record } = relation {
                let mut current_relation_tags = Vec::<RelationTagRecord>::new();
                if let Some(relation_tag_record) = self.next_relation_tag_record.take() {
                    if relation_tag_record.relation_id() == relation_record.relation_id() && relation_tag_record.version() == relation_record.version() {
                        current_relation_tags.push(relation_tag_record);
                        for relation_tag in self.relation_tags_iterator.by_ref() {
                            if let TableRecord::RelationTag { relation_tag_record } = relation_tag {
                                if relation_tag_record.relation_id() == relation_record.relation_id() && relation_tag_record.version() == relation_record.version() {
                                    current_relation_tags.push(relation_tag_record)
                                } else {
                                    self.next_relation_tag_record = Some(relation_tag_record);
                                    break;
                                }
                            } else {
                                panic!("Found incorrect record type, not a TableRecord:RelationTag");
                            }
                        }
                    } else {
                        self.next_relation_tag_record = Some(relation_tag_record);
                    }
                } else {
                    for relation_tag in self.relation_tags_iterator.by_ref() {
                        if let TableRecord::RelationTag { relation_tag_record } = relation_tag {
                            if relation_tag_record.relation_id() == relation_record.relation_id() && relation_tag_record.version() == relation_record.version() {
                                current_relation_tags.push(relation_tag_record)
                            } else {
                                self.next_relation_tag_record = Some(relation_tag_record);
                                break;
                            }
                        } else {
                            panic!("Found incorrect record type, not a TableRecord:RelationTag");
                        }
                    }
                }

                let mut current_relation_members = Vec::<RelationMemberRecord>::new();
                if let Some(relation_member_record) = self.next_relation_member_record.take() {
                    if relation_member_record.relation_id() == relation_record.relation_id() && relation_member_record.version() == relation_record.version() {
                        current_relation_members.push(relation_member_record);
                        for relation_member in self.relation_members_iterator.by_ref() {
                            if let TableRecord::RelationMember { relation_member_record } = relation_member {
                                if relation_member_record.relation_id() == relation_record.relation_id() && relation_member_record.version() == relation_record.version() {
                                    current_relation_members.push(relation_member_record)
                                } else {
                                    self.next_relation_member_record = Some(relation_member_record);
                                    break;
                                }
                            } else {
                                panic!("Found incorrect record type, not a TableRecord:RelationMember");
                            }
                        }
                    } else {
                        self.next_relation_member_record = Some(relation_member_record);
                    }
                } else {
                    for relation_member in self.relation_members_iterator.by_ref() {
                        if let TableRecord::RelationMember { relation_member_record } = relation_member {
                            if relation_member_record.relation_id() == relation_record.relation_id() && relation_member_record.version() == relation_record.version() {
                                current_relation_members.push(relation_member_record)
                            } else {
                                self.next_relation_member_record = Some(relation_member_record);
                                break;
                            }
                        } else {
                            panic!("Found incorrect record type, not a TableRecord:RelationMember");
                        }
                    }
                }

                Some(
                    RelationRelation::new(
                        relation_record,
                        current_relation_members,
                        current_relation_tags,
                    )
                )
            } else {
                panic!("Found incorrect record type, not a TableRecord:Relation");
            }
        } else {
            None
        }
    }
}