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structs.go
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structs.go
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package main
// -------- JSON Responses --------- //
// DetailResponse struct is a simple JSON response
// struct used to send detail messages usually
// concerning errors or generic single model responses.
type DetailResponse struct {
Detail string `json:"detail"`
}
// -------- Data Structures -------- //
// Singly Linked List //
// Node implements the base block of
// the List structure element for
// holding variable - type data.
type Node struct {
next *Node
value interface{}
}
// List struct is used as a simple data
// structure for easy insertions and
// traversing elements in rows.
type List struct {
len uint32
head *Node
tail *Node
}
// Adds an element to the list.
func (l *List) append(value interface{}) {
// Create node with empty value.
node := Node{value: value}
// If length of l is 0, then head
// and tail are the same node.
if l.len == 0 {
l.head = &node
l.tail = &node
} else {
// If there are some elements in list
// then make the tail point to the new
// node and change the tail to said node.
tail := l.tail
tail.next = &node
l.tail = &node
}
// Increment length.
l.len++
}
// Converts node to uint32 slice for
// easier usage and traversal.
func (l List) toUint32Slice() []uint32 {
s := make([]uint32, l.len)
for e, i := l.head, 0; e != nil; e, i = e.next, i+1 {
s[i] = e.value.(uint32)
}
return s
}
func (l List) toArticleSlice() []Article {
s := make([]Article, l.len)
for e, i := l.head, 0; e != nil; e, i = e.next, i+1 {
s[i] = e.value.(Article)
}
return s
}
func (l List) toStringSlice() []string {
s := make([]string, l.len)
for e, i := l.head, 0; e != nil; e, i = e.next, i+1 {
s[i] = e.value.(string)
}
return s
}
// -------- Models -------- //
// Article model structure used for storing
// Article database objects to be serialized into
// JSON responses utilized by DetailResponse.
type Article struct {
ID uint32 `json:"id"`
Tags []string `json:"tags"`
Slug string `json:"slug"`
Draft bool `json:"draft"`
Topic string `json:"topic"`
Title string `json:"title"`
Author string `json:"author"`
Content string `json:"content"`
Thumbnail string `json:"thumbnail"`
Timestamp string `json:"timestamp"`
Objectivity int64 `json:"objectivity"`
}
// Inserts the username of an Author from the provided ID
// into the pointer of the Article structure.
func (article *Article) insertAuthorUsernameFromAuthorID(id uint32) {
article.Author, _ = getAuthorUsernameFromId(id)
}
// Inserts the topic of an Article from the provided ID
// into the pointer of the Article structure.
func (article *Article) insertTopicNameFromTopicID(id uint32) {
article.Topic, _ = getTopicNameFromId(id)
}