chore: fixed some issues reported by nimalyzer

FossilOrigin-Name: ae52daa9c190f6944af89606c79ecf7aaaf8305d9b693810da02915ec08eeb38

src/history.nim

@@ -49,11 +49,20 @@ type
     ## * lastUsed - the time when the command was recently excute
     ## * amount   - how many times the user executed the command
     ## * path     - the full path in which the command was executed
-    command*: string
+    command: CommandName
     lastUsed: DateTime
-    amount: int
+    amount: int32
     path: Path
 
+proc command*(entry: HistoryEntry): CommandName {.sideEffect, raises: [], tags: [],
+    contractual.} =
+  ## The getter of a field of HistoryEntry type
+  ##
+  ## * entry - the HistoryEntry object which field will be get
+  ##
+  ## Returns the value of the selected field
+  entry.command
+
 using
   db: DbConn # Connection to the shell's database
   arguments: UserInput # The arguments for a command entered by the user
@@ -78,7 +87,7 @@ proc historyLength*(db): HistoryRange {.sideEffect, raises: [], tags: [
       return HistoryRange.low
 
 proc newHistoryEntry(command: CommandName = ""; lastUsed: DateTime = now();
-    amount: Positive = 1; path: Path = "".Path): HistoryEntry {.raises: [],
+    amount: int32 = 1; path: Path = "".Path): HistoryEntry {.raises: [],
     tags: [], contractual.} =
   ## Create a new data structure for the shell's commands' history entry.
   ##
@@ -182,7 +191,7 @@ proc getHistory*(historyIndex: HistoryRange; db;
   body:
     try:
       type LocalEntry = ref object
-        command: string
+        command: CommandName
       var entry: LocalEntry = LocalEntry()
       # Get the command based on the historyIndex parameter
       if searchFor.len == 0:
@@ -294,9 +303,9 @@ proc showHistory(db; arguments): ResultCode {.sideEffect, raises: [],
           e = getCurrentException(), db = db)
     try:
       type LocalEntry = ref object
-        command: string
+        command: CommandName
         lastUsed: DateTime
-        amount: int
+        amount: int32
       var entries: seq[LocalEntry] = @[LocalEntry()]
       db.rawSelect(qry = "SELECT command, lastused, amount FROM history ORDER BY " &
           historyOrder & " LIMIT 0, ?", objs = entries, params = amount)
@@ -347,7 +356,7 @@ proc findInHistory(db; arguments): ResultCode {.raises: [], tags: [
           db = db)).parseInt
       var currentRow: Natural = 0
       type LocalEntry = ref object
-        command: string
+        command: CommandName
       var entries: seq[LocalEntry] = @[LocalEntry()]
       db.rawSelect(qry = "SELECT command FROM history WHERE command LIKE ? ORDER BY lastused DESC, amount DESC",
           objs = entries, params = "%" & searchFor & "%")

src/types.nim

@@ -124,18 +124,18 @@ type
     dirs = "Directories only", files = "Files only",
     dirsfiles = "Directories and files", commands = "Commands",
     custom = "Custom", none = "Completion for the selected command should be disabled"
-  CompletionCommand* = string
-    ## Used to store the command to which completion will be added
   CompletionValues* = string
     ## Used to store the values of the selected completion
+  CommandName* = string
+    ## Used to store the name of a command
   Completion* {.tableName: "completions".} = ref object of Model
     ## Data structure for the shell's commands' completion
     ##
     ## * command - the command for which the completion is set
     ## * cType   - the type of completion for the command
     ## * values  - the proper values of completion if the completion's type is
     ##             set to the custom type
-    command* {.unique.}: CompletionCommand
+    command* {.unique.}: CommandName
     cType*: CompletionType
     cValues*: CompletionValues
   Plugin* {.tableName: "plugins".} = ref object of Model
@@ -174,8 +174,6 @@ type
     description*: VariableDescription
   ResultCode* = distinct Natural
     ## Used to store result code from commands entered by the user
-  CommandName* = string
-    ## Used to store the name of the user's command
   DbString* = string
     ## Used to store some text related to database
   OutputMessage* = string